ELECTRIC FLIGHT U.K. - British Electric Flight Association - Ef-uk.net
ELECTRIC FLIGHT U.K. - British Electric Flight Association - Ef-uk.net
ELECTRIC FLIGHT U.K. - British Electric Flight Association - Ef-uk.net
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<strong>ELECTRIC</strong> <strong>FLIGHT</strong> U.K.<br />
ISSUE No. 76 SPRING 2004<br />
THE MAGAZINE OF THE<br />
BRITISH <strong>ELECTRIC</strong><br />
<strong>FLIGHT</strong> ASSOCIATION
http://www.ezonemag.com<br />
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Showcase of manufacturers’ electric offerings<br />
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<strong>Electric</strong> <strong>Flight</strong> - U.K. Issue 76 - Spring 2004<br />
"To Encourage and Further all Aspects of <strong>Electric</strong> Model <strong>Flight</strong> in<br />
the <strong>British</strong> Isles and Elsewhere" - B.E.F.A. Constitution<br />
CONTENTS<br />
BEFA Committee 2003/4 ........................... 4<br />
Chairman's Chatter .................................. 5<br />
Current Lines ........................................... 6<br />
AGM 2004 News ....................................... 6<br />
World Championships Update ................... 7<br />
New-2-U ................................................... 9<br />
Mini 3D flying with LiPo cells ...................18<br />
Safety with LiPo batteries ........................22<br />
<strong>Electric</strong> RTP ............................................23<br />
A Thrust Measuring System ....................28<br />
Index to EF-UK Issues 60 to 76 ................33<br />
World Championships Trophies Appeal ....41<br />
Sniff the Dope! .........................................43<br />
Man Carrying Balloons & <strong>Electric</strong> <strong>Flight</strong> .. 52<br />
KAN 1050 NiMH Cells .............................54<br />
Event Calendar .......................................59<br />
For Sale / Wanted .....................................67<br />
New to <strong>Electric</strong> <strong>Flight</strong> Start Here ............69<br />
BEFA Sales .............................................70<br />
Advertisers Index .....................................70<br />
Cover Photo: On the cover this month is David Perrett’s Mini Laser 3D aerobatic<br />
model. It features a Hacker B20-15L motor with 4:1 gearbox, a 9” x 4½” APC<br />
<strong>Electric</strong> propeller and a Thunderpower 2000 3S1P Lithium Polymer battery pack.<br />
See page 18 for more information.<br />
NEXT ISSUE. The copy date for the Summer 2004 issue is 31 May 2004, with the<br />
magazine due for publication 30th June 2004.<br />
DISCLAIMER<br />
B.E.F.A. and <strong>Electric</strong> <strong>Flight</strong> U.K. wish to point out that the content, techniques and opinions<br />
expressed in this magazine are those of the individual authors and do not necessarily represent the<br />
views of either the Editor of this magazine or B.E.F.A. and its committee.<br />
© All information in this magazine is copyright of the authors. Any request to use information<br />
from this magazine is to be made to the editor (contact details overleaf).<br />
All reasonable care is taken in the preparation and compilation of the magazine, but B.E.F.A. and<br />
its committee cannot be held liable for any error or omission in the content of this magazine or any<br />
subsequent damage or loss arising howsoever caused.<br />
To allow proper appreciation of the photographs used, colour copies of them will be posted on the<br />
B.E.F.A. website after publication of this magazine. If you can, check them out at www.befa.org.<strong>uk</strong><br />
E.F.-U.K. 3
4<br />
BEFA Committee 2004/5<br />
Chairman<br />
Robert Mahoney<br />
123 Lane End Road, High Wycombe, Bucks. HP12 4HF<br />
EMail: befa@rlmahoney.co.<strong>uk</strong><br />
Secretary<br />
Peter Turner<br />
37 Church Street, Horsley, Derbyshire. DE21 5BQ<br />
Email: peter@alport.fs<strong>net</strong>.co.<strong>uk</strong><br />
Membership Secretary David Andrews<br />
2 Gainsborough Road, Kibworth Harcourt, Leicester. LE8 0SG<br />
Email: david@kibworth.fs<strong>net</strong>.co.<strong>uk</strong><br />
Treasurer<br />
Bob Smith<br />
1 Lynwood Avenue, Tollesby, Middlesborough, Cleveland. TS5 7PD<br />
Email: bobsmith@ntlworld.com<br />
EF-UK Editor<br />
Jan Bassett<br />
111 Plantage<strong>net</strong> Chase, Yeovil, Somerset. BA20 2PR<br />
Tel. 01935 472743, E-mail: editor@befa.org.<strong>uk</strong><br />
EF-UK Printer<br />
Brian Boughton<br />
'Red Roofs', Vicarage Road, Thetford, Norfolk. IP24 2LH<br />
Events Co-ordinator Terry Stuckey<br />
31 Dysart Avenue, Kingston-upon-Thames, Surrey. KT2 5QZ<br />
Email: terrystuckey@blueyonder.co.<strong>uk</strong><br />
Competition Secretary David Beavor<br />
34 Chestnut Close, Brampton, Huntingdon, Cambs.<br />
Midlands Representative Roger Winsor<br />
14 Butler Gardens, Market Harborough, Leics. LE16 9LY<br />
Email: Rogerwinsor7@aol.com<br />
Northern Representative Bob Smith, details as Treasurer<br />
Southern Representative Dave Chinery<br />
251 Station Road, Hayes, Middx. UB3 4JD<br />
Email: DavidDchinery@aol.com<br />
South West Representative Jan Bassett, details as Editor EF-UK<br />
Indoor & Free-<strong>Flight</strong> Rep. Gordon Tarling<br />
87 Cowley Mill Road, Uxbridge, Middx. UB8 2QD<br />
Email: gordon.tarling@ntlworld.com<br />
Technical Liaison Officer Alan Bedingham<br />
17 Highcliffe Close, Wickford, Essex. SS11 8JZ<br />
Email: bbba18333@blueyonder.co.<strong>uk</strong><br />
Public Relations Officer Dave Perrett<br />
10 High Lees, Sharnford, Leicester. LE10 3PW<br />
Tel: 01455 272297, Email: d.l.perrett@btinter<strong>net</strong>.com<br />
Webmaster<br />
Jan Bassett, details as Editor EF-UK - (www.befa.org.<strong>uk</strong>)<br />
Safety Adviser<br />
Stan Rose<br />
Tel: 01636 525029, Email: rose@elston4.freeserve.co.<strong>uk</strong><br />
Please enclose an SAE with all correspondence to the committee.<br />
E.F.-U.K.
Chairman’s Chatter<br />
Dear members,<br />
We are now approaching the fourteenth year since being formed. In the last year<br />
I have attended the Dortmund Intermodellbau, and at the BMFA AGM with Peter<br />
Turner, promoting our <strong>Association</strong> to flyers from all flying disciplines.<br />
This year I succeeded in getting Jean-Paul Schlösser (JePe) to come over to the<br />
Middle Wallop event for a second time. The sights and sounds of his models said<br />
SPEED, and in a big way! Jean-Paul said (by email) that Middle Wallop was the<br />
best event that Team JePe had ever flown at.<br />
Your committee is now getting ready for the round of Exhibitions that we display<br />
our wears at, and in the organising of our Fly-Ins that have been announced on<br />
the web site and in this issue of EF-UK. The web site is updated regularly include<br />
the most up to date news that we have on flying events throughout the year. For<br />
those that can’t remember the web site address it is www.befa.org.<strong>uk</strong><br />
Some additional news about our Middle Wallop Fly-In is that we have been granted<br />
permission (by Lt. Col (Retd) RJ Thayer) for our weekend again this year. This is<br />
due to your Fly-In crew leaving the airfield as we found it (or better) and the way<br />
that David Beavor runs the flight line.<br />
We have also been informed that JePe is attending again this year, for the third<br />
consecutive year. If you want to see the phenomenal performance of his ducted fan<br />
and propeller powered models, you better come along to the Middle Wallop event<br />
this year.<br />
Remember: You will need an “A” CERTIFICATE<br />
to fly at a BEFA event this year.<br />
The “A” Certificate has to be in a related discipline, i.e. any class of Fixed Wing<br />
certificate for Fixed Wing models, and a helicopter certificate for helicopters.<br />
I would like to thank the committee on your behalf for the hard work they have<br />
done during the past twelve months.<br />
You are probably aware that 2004 is the year of the <strong>Electric</strong> World Championships<br />
to be held in the UK. The events will be held on the York Race Course over the<br />
period 9th to 15th August. More information on the World Championships can be<br />
found in this issue starting on pages 7 and 41.<br />
All the best for the 2004 flying season, KEEP THE WATTS UP and SAFE FLYING!<br />
Robert Mahoney<br />
AGM APOLOGY<br />
On behalf of the BEFA committee I would like to apologise to David and Will<br />
Beavor and Gordon Whitehead for not presenting their awards at the AGM. Your<br />
committee is updating their procedures to ensure it does not happen again.<br />
Robert Mahoney, Chairman on behalf of the BEFA Committee<br />
E.F.-U.K. 5
6<br />
Current Lines<br />
from the Editor<br />
It seems like five minutes since I was editing the last issue, doesn’t time fly when<br />
you’re having fun. I have just been re-elected as the Editor for the next 2 years so<br />
there is plenty more to come from me.<br />
I pass on my thanks to the contributors in this issue, but I am still struggling to<br />
get sufficient articles for each issue. I even had to resort to writing a little myself<br />
this time. I really have enough work to do in editing the magazine, without having<br />
to write it as well.<br />
Everyone reading this can contribute something, even if only<br />
a photograph of a model and the relevant details.<br />
All material for EF-UK should be sent to me, EF-UK Editor, at the address on<br />
page 4. If you are in any doubt over whether to submit something, or in what<br />
format, contact me to discuss it.<br />
In the centre of this issue you will find an update to the index that was published<br />
in issue 59. You will find the whole index (issues 28 to 76) on the website under<br />
the EF-UK page. If you don’t have inter<strong>net</strong> access and want a print of the whole<br />
index, send an C5 size S.A.E. and £2 to me at the address on page 4.<br />
Best wishes for the 2004 season, I do hope to see lots of you at the Fly-Ins.<br />
Regards<br />
Jan Bassett<br />
AGM 2004 News<br />
by Jan Bassett<br />
There is very little of significance to report from the AGM, but the following is an<br />
extremely short summary of the key points:<br />
• As usual half the committee officers had served their term of election. No<br />
nomination had been received for any post, and the current incumbents were all<br />
unanimously re-elected to serve another term.<br />
• A £1 increase in the membership subscription was agreed, making the UK<br />
subscription £21, Europe £22 and the Rest of the World £28.<br />
• It was also suggested from the membership that the option to donate money to<br />
the BEFA be included on the membership form. This was discussed and the<br />
membership agreed that this was reasonable. You will therefore find a new line<br />
added stating that any additional monies sent will be added to the BEFA funds.<br />
• The next AGM will be held at Royal Leamington Spa on 20 March 2005.<br />
E.F.-U.K.
World<br />
Championships<br />
Update<br />
by Bob Smith<br />
We first announced these championships in Issue 73 of EF-UK (Summer 2003) so<br />
this is an update of the situation regarding the organisation of the Championships.<br />
If you wish to keep yourself up to speed with the preparations then the best<br />
source is the website http://ewc2004.users.btopenworld.com<br />
One of the major additions to the arrangements is the final Sunday when the<br />
BEFA have agreed to organise a Fly-in along the same successful lines as we use<br />
for Leamington and Middle Wallop. This will be a chance for all of our members to<br />
say that they flew at a World Championship meeting.<br />
Remember also that the Open and the Sunrise-Sunset events at the start of the<br />
period are also "open" to all entries. The full programme of events is currently as<br />
follows:-<br />
Fri. 6th August<br />
Sat. 7th to Mon. 9th<br />
Mon. 9th<br />
Tues. 10th to Sat. 14th<br />
Fri. 13th<br />
Sat. 14th<br />
Sat. 14th evening<br />
Sun. 15th<br />
Sunrise-Sunset competition, Overall Registration<br />
Open Events, F5B, F5D, F5F, 7-cell F5B<br />
World Championship model processing<br />
Opening ceremony and briefings<br />
F5B and F5D World Championship rounds<br />
World Championship rounds, spare time (rain), Tours<br />
Final rounds, spare time (rain), Prizegiving<br />
Banquet<br />
BEFA <strong>Electric</strong> Fly-in<br />
Entries into the Championships are going well although the numbers are based<br />
upon preliminary indications. At the moment, we have 12 teams of 3 flyers plus 8<br />
individuals entered in F5B and 7 teams of 3 plus 1 individual in F5D.<br />
E.F.-U.K. 7
These numbers are at the moment higher than those for the last championships<br />
held in Switzerland 2002 so we are hopeful of a tremendous event.<br />
With the whole event lasting 10 days visitors may want to stay for more than just<br />
a day trip and if you are considering finding accommodation there is a fair range<br />
available. The site has excellent camping/caravanning facilities immediately adjacent<br />
to the flying area. Toilets, washing, and shower facilities are directly adjacent.<br />
There is hostel accommodation at the Racecourse Centre (2 mins walk) and at<br />
York University (10/15 mins drive).<br />
A vast amount of accommodation is available in and around York. It is an historic,<br />
walled city and is visited by many tourists in the summer months, because of this<br />
accommodation should be booked reasonably early if visitors wish to have a good<br />
choice.<br />
Parking at any inner-city hotel could be a problem and competitors should check<br />
carefully what parking is available. Out of town parking at any hotel should<br />
present no problem but checking is advisable. Typical hotels include -<br />
Holiday Inn *** (3 mins walk to flying site)<br />
Novotel York *** (5 mins drive)<br />
Wheatlands Hotel ** (3 mins drive)<br />
Grimston House Hotel (10/15 mins drive)<br />
Many local Guest Houses offer Bed & Breakfast accommodation.<br />
Full details of all the accommodation in and around York can be found at<br />
www.visityork.org<br />
One last piece of information for <strong>Association</strong> members. The operation of a<br />
Championship of this size needs a lot of manpower. Not only do we need people to<br />
operate the courses in the form of marshals, turn judges, etc., but we need<br />
individuals who are happy to help in the less romantic jobs like helping in<br />
Transmitter control and in the refreshment tent.<br />
If you are able to find time to attend the WCs for any period and you are willing to<br />
help with the operation then we would like to hear from you. Please drop me (or<br />
anyone else on the organising committee) a note, email, phone call, pigeon post,<br />
or whatever. We would be very pleased to hear from you and you will have a once<br />
in a lifetime chance to see the best electric flyers in the world from close-up.<br />
8<br />
E.F.-U.K.
New-2-U<br />
A Brief Round-up of New Items of Interest.<br />
If you are a manufacturer or retailer that has something new they want to<br />
share with the readers, please send details to the Editor (addresses on page 4).<br />
Announcing the new POWERMAX 40 motor from Fanfare.<br />
Nigel Hawes (of Tucano fame) was instrumental in initiating the development of<br />
this high wind ferrite motor. His previous experience with the Fanfare 20 turn<br />
motor and the 3.33:1 MPJ gearbox was assessed "as good as the brushless motor"<br />
that he had used with the model.<br />
In collaboration with Glyn Ward (Fanfare's motor maker) the possibility of a<br />
ferrite motor, without the gearbox, equalling the brushless motor, was explored.<br />
The 40 turn Powermax is the result - Probably the first "buggy" motor DESIGNED<br />
for electric flight.<br />
Sample test figures:-<br />
Cells Propeller RPM Amps<br />
7 11" x 8½" 5600 25A<br />
8 11" x 5½" 7200 25A<br />
10 9" x 6" 9500 25A<br />
All figures are DIRECT DRIVE!<br />
“The buggy motor that thinks it's<br />
a brushless", the POWERMAX 40<br />
turn motor is obtainable from:-<br />
Fanfare,<br />
18 Hillside Road,<br />
Tankerton,<br />
Whitstable,<br />
Kent.<br />
CT5 3EX.<br />
Tel: 01227 771331.<br />
Email: john.swain1@virgin.<strong>net</strong><br />
Website: www.fanfare.f9.co.<strong>uk</strong><br />
Price £38.00 +P&P<br />
E.F.-U.K. 9
Fancy something unusual, then the GWS Merlin (aka Magician) could be for you.<br />
The EPS350C powered version is shown above, and it is also available in a slightly<br />
smaller IPS version (shown below). Both versions are colour printed on both<br />
sides , come complete with the relevant power system and feature rudder, elevator<br />
and throttle control.<br />
Order No. GW/MAGICIAN-IPS GW/MAGICIAN-EPS350C<br />
Length 94 cm (37.0”) 105 cm (41.3”)<br />
Hat (Wing) Span 42 cm (16.5”) 46 cm (18.1”)<br />
Hat Area 13.9 dm 2 (215 sq. in.) 16.6 dm 2 (257 sq.in.)<br />
Flying Weight 170 - 250 g 280 - 330 g<br />
(6.0 - 8.8 oz.) (9.9 - 11.6 oz.)<br />
Hat Loading 12 - 18 g/dm 2 17 - 20 g/dm 2<br />
(4 - 6 oz./sq. ft.) (5½ - 6½ oz./sq. ft.)<br />
Power System IPS EPS350C<br />
Propeller 8” x 4.3” or 8” x 6” 10” x 4.7” or 9” x 7”<br />
Min. Battery 6 or 7 300 mAh NiMH 7 AAA 730 mAh NiMH<br />
10<br />
E.F.-U.K.
Model Airplane Engineering have<br />
recently introduced the Nemesis 3D-II.<br />
It is a simple, yet sophisticated, confinedarea,<br />
highly manoeuvrable park flyer.<br />
Suitable for both indoor and outdoor<br />
flying, the N3D-II is not a beginner’s<br />
plane but is suitable for intermediate to<br />
advanced flyers. The model & kit feature:<br />
• Premium laser cut balsa & ply.<br />
• Ultra light & designed for strength<br />
• Interlocking construction for “goof<br />
proof” assembly<br />
• Carbon Tube thru-the-wing fuselage<br />
“backbone”<br />
• Full-size CAD drawn plans<br />
• Picture enhanced instruction book<br />
• Flexible brushed and brushless<br />
power options<br />
• Alternate servo mounting locations<br />
• Excellent flight characteristics<br />
Span:<br />
27” (69 cm)<br />
Area: 200 sq. in. (12.9 dm 2 )<br />
Weight: 4½ - 6½ oz. (128 - 184g)<br />
Motors:<br />
Batteries:<br />
Price:<br />
Website:<br />
Email:<br />
IPS-DXA-D,<br />
M100,<br />
PJS-300,<br />
Razor,<br />
Astro <strong>Flight</strong> 010<br />
2S E-tec 700mAh Li-Poly,<br />
2S Kokam 340mAh Li-Poly,<br />
3S Kokam 340mAh Li-Poly<br />
$43.95 + P&P<br />
www.m-a-e.com<br />
M-A-E@att.<strong>net</strong><br />
The MAE on-line ordering system will<br />
only work for the USA, other orders have<br />
to be by email.<br />
E.F.-U.K. 11
Above is the Graupner MICRO STAR 400 (Part No. 4441), a miniature electric<br />
helicopter which boasts all the performance and handling of much larger models.<br />
The MICRO STAR 400 can be flown in quite strong winds without problems, in<br />
spite of its diminutive size. The flight time in Graupner’s experience is around 15<br />
minutes under normal conditions with the recommended LiPo battery. The roll,<br />
pitch and collective pitch controls are mechanically mixed, so the model can be<br />
flown using a simple 4 channel radio (motor & collective coupled using a Y-lead).<br />
A transmitter with helicopter functions offers advantages. The model's strong,<br />
lightweight chassis consists of nylon components, while the tail boom, boom braces<br />
and skids are made of anodised aluminium. The tail rotor is driven by means a<br />
single-stage gearbox with an integral auto-rotation freewheel via a ball-raced carbon<br />
fibre shaft. The instructions are in German, English and French and the model is<br />
largely factory-assembled with pre-fitted motor and a decal sheet. The MICRO<br />
STAR 400 is supplied in a cardboard box (with carrying handle), which can later<br />
be used transport the model (after removing the main rotor blades).<br />
Dimensions (LxHxW, no rotors) 58 x 20.5 x 9 cm<br />
Main / tail rotor ø<br />
63 / 14 cm<br />
<strong>Flight</strong> weight<br />
495 g<br />
Gear ratios Main/Tail 13.2:1 / 4:1<br />
Also recently introduced is an NH90 body shell expansion kit for the JetCat<br />
mechanics (shown below) which features 4-bladed main and tail rotor assemblies,<br />
which are available separately for your own scale projects. The NH90 kit is intended<br />
to represent the Combat SAR version and includes vacuum-moulded bodywork<br />
components and dummy GRP auxiliary fuel tanks (The drop tanks are designed<br />
to be installed permanently, but can be made jettisonable by radio).<br />
12<br />
E.F.-U.K.
Left and below is the Graupner<br />
Mosquito, a miniature model<br />
for 250 motors are 2 to 3 LiPo<br />
cells of about 240 mAh capacity.<br />
It is a quick build kit<br />
consisting of ready-made<br />
parts & linkage hardware<br />
pack. The wing is solid<br />
balsa machined to airfoil<br />
section, while the fuselage<br />
is based on a vacuummoulded<br />
top section with<br />
integral canopy.<br />
Span 58 cm<br />
Area 4.3 dm 2<br />
Weight 90g<br />
Rudder, Elevator &<br />
throttle control<br />
The kit contains instructions in German, English & French. One-piece profilemachined<br />
wing of lightweight solid balsa. Die-cut sheets for fuselage / tail parts,<br />
vacuum-moulded fuselage top, small items, decal sheet, linkage hardware pack.<br />
Left and above is the<br />
Graupner Nemesis (seems<br />
to be a popular name). It<br />
is virtually a scale model<br />
of the original American<br />
F1 racing aircraft. The model comes out of the packaging as a one-piece moulding.<br />
The power and RC systems are installed via the removable fuselage top section,<br />
and a tailor-made well is provided for each component. Finishing just means<br />
applying the decals, producing a beautiful micro RC model which even makes an<br />
eye-catching decoration on a shelf in the living room.<br />
Dimensions: Span 45 cm, Area 3.54 dm 2 , Weight 120g<br />
Controls: Ailerons, Elevator & Speed Controller.<br />
E.F.-U.K. 13
This page shows the 3 variants of the<br />
Ikarus Shock Flyers range of profile 3D<br />
aerobatic models.<br />
The Shock Flyers come in three versions,<br />
"Super Star" (red & white - top left),<br />
"Extra 330S" (red & white - middle right)<br />
and "Edge 540" (blue & white - bottom<br />
right). The top right picture shows the<br />
kit contents for the Super Star model.<br />
These are lightweight foam models with<br />
carbon fibre reinforcement. Equip them<br />
the way thy recommend for EXTREME<br />
performance: hand launch is a release to<br />
a wild climb; knife-edge loops - wild<br />
aerobatics that you hope you can keep<br />
up with.<br />
Kits come pre-printed with colourful<br />
graphics and only require a few hours to<br />
assemble. Glue and hinge tape included.<br />
Have good instructions with drawings<br />
and photos.<br />
<strong>Flight</strong> times exceed 15 minutes with<br />
Lithium batteries. You could fly these<br />
planes on a standard 4 channel radio but<br />
it is recommend the radio has mixing<br />
functions, exponential, and end point adjustments for much better control.<br />
Kit come with a specifically designed 3D geared motor (300 size), CAD/CAM designed<br />
propeller and more than enough power for hovering & vertical climbs. A lower<br />
priced alternative kit is available without the power system<br />
Developed for the latest generation in Lithium-Polymer batteries, but can also be<br />
used with 7 x 350 mAh AA NiCd cells.<br />
Span is 31½” (80cm), wing area: 225 sq. in. (14.5 dm 2 ) and weight 8 oz. (225g).<br />
14<br />
E.F.-U.K.
Two new models brought<br />
out by Aero-Naut are<br />
improved versions of<br />
models previously sold by<br />
Ikarus.<br />
The “Twinspeedy” (top -<br />
electric powered) and the<br />
“Sailspeedy” (glider).<br />
Twinspeedy is an electric<br />
glider that is highly<br />
prefabricated and consists<br />
of high-density foam<br />
parts.<br />
Additional strengthening<br />
members from carbon<br />
fibre in the fuselage and<br />
carbon fibre spars in the<br />
wing produce a very<br />
strong airframe.<br />
They is designed for three-axis control (ailerons, elevator, rudder) plus speed control<br />
for the Twinspeedy. They offer superb flying characteristics and straightforward<br />
handling thanks to its low weight and V-tail.<br />
The Twinspeedy is designed to accept 2 Race 400 (Speed 400) electric motors and<br />
Günther propellers. They operate in pusher mode and are very effective, giving<br />
the model a high airspeed with good pushing power. Battery of 6 to 7 cells provide<br />
a powerful climb performance to bring the model up to thermal-hunting altitude.<br />
The model is equally capable of impressive high-speed passes.<br />
Wing Span: 121 cm (47.6”), Area 17 dm 2 (264 sq. in.) and a weight of 730 to 780g<br />
(25.7 to 27.5 oz.) for the Twinspeedy and around 350g (12.3 oz.) for the Sailspeedy.<br />
The kit (shown below) is supplied as Styrofoam fuselage, wing and tail parts and<br />
hardware pack. The “Twinspeedy” additional requires the 2 motors. The<br />
E.F.-U.K. 15<br />
recommended price for both versions is • 79.90 (approx. £55).
9” x 4½” APC <strong>Electric</strong> prop. I had also indulged in a Thunderpower 2000 3S1P<br />
Lithium Polymer Following the success of his previous title, Andrew Gibbs has<br />
now released a new 44 page User Friendly Guide covering NiCd and NiMH batteries.<br />
The guide retains the same handy A5 size format, is clearly written and easy to<br />
understand. It covers a wide range of topics including charging, discharging,<br />
current limits, testing & maintenance, memory effect and much more besides.<br />
Four useful charging graphs are also featured. The guide will prove useful to any<br />
modeller using batteries from beginner to expert.<br />
The User Friendly Guide to Nickel Cadmium and Nickel Metal Hydride Batteries<br />
is available from leading retailers or direct from Andrew. Cheques for £6.75<br />
(including P&P) should be sent to:<br />
Andrew Gibbs, 14 Atherley Court, Hill Lane, Southampton, SO15 7NG<br />
Tel: 07973 627 738<br />
Email: 16 mrandrewgibbs@yahoo.com E.F.-U.K.
Recently released by Buzzflight are 2 new electric control line models for more<br />
experienced pilots.<br />
First is the Hummingbird<br />
AEROBATIC Kit, with a<br />
645mm (25") wingspan. This is<br />
the model for those who already<br />
fly I/C aerobatic control-line or<br />
those who have trained on the<br />
Junior or Intermediate<br />
Hummingbird and want to add<br />
to their flying skills! It flies on<br />
6 m (20 ft.) lines. Requires a<br />
12V Sealed Lead Acid Battery<br />
(SLAB) and a 6V SLAB linked<br />
in series. The pilot carries the<br />
batteries in a small haversack<br />
The Buzzflight Hummingbird AEROBATIC<br />
(not supplied) when flying.<br />
Kit contents: CNC cut parts in balsa and plywood, electric motor (direct 400<br />
series), Günther propeller, undercarriage wire, wheels, control line / power wire,<br />
on-off switch, all electrical connectors, sundries, building instructions, full size<br />
plan of the model and the control line handle, price £39.99 + £2.95 P&P. If you<br />
have a Buzzflight control line set-up with 6m lines, an alternative kit is available<br />
without these for £34.99 + £2.95 P&P.<br />
Second is the Hummingbird<br />
FIGHTING, which utilises the same<br />
wing configuration as the Aerobatic<br />
Hummingbird but with a profile<br />
fuselage. It will be interesting to see<br />
what Combat competitors will do with<br />
this little speedster.<br />
With the added dynamic of the on/off<br />
switch to slow down the model<br />
(unheard of with I/C powered models),<br />
new fighting tactics will surely be<br />
developed.<br />
The kit contents, options are prices<br />
are the same as for the Hummingbird<br />
The Buzzflight Hummingbird FIGHTING<br />
AEROBATIC.<br />
More information on these and the models in the Buzzflight range is available at<br />
www.buzzflight.co.<strong>uk</strong> Contact them by email at sales@buzzflight.co.<strong>uk</strong> on<br />
telephone 01332 601 693 or by mail at 167 Duffield Road, Derby, DE22 1AJ.<br />
E.F.-U.K. 17
Mini 3D flying with LiPo cells<br />
by Dave Perrett<br />
My main electric flying has been with Electroslot models, but I have built and<br />
flown the Pico-Jet, an electric Lazy Bee and David Theunissen's Bubbles (the plan<br />
downloaded from his website). The last three have flown well enough but have<br />
not been capable of 3D flight which the Americans in particular seem to have<br />
perfected with electric models, but I had not come across anything suitable.<br />
However at a trade show I came across the Mini-Laser 3D. It has a 31 in. wing<br />
span, 551 sq. in. of wing area and a <strong>net</strong> weight of about 10 oz. (you can see how<br />
old I am because I have to convert everything to pre-decimal figures - Editor: for<br />
the younger readers, span 79 cm, area 35.5 dm 2 and weight 285g).<br />
It can be bought ready built or as a kit. Surprisingly the kit is manufactured in<br />
Belgium. At the trade show the kit was on offer second hand but untouched at<br />
£40. It comes complete with a 300 motor, 3.75:1 gearbox, propeller and a very<br />
complete manual. Colin Prior was at the show and told me it flies quite well on<br />
the standard motor and 7 Sanyo 500AR cells.<br />
I had noticed that Hacker's advert suggested using the Hacker B20-15L brushless<br />
motor and 4:1 gearbox for this model. I already had the motor so money changed<br />
hands rapidly at the show for the kit.<br />
18<br />
The new motor mount for the Hacker B20 - 15L and gearbox<br />
E.F.-U.K.
On getting home I examined the kit. The CNC cutting is superb. I defy anyone to<br />
cut out the relatively small tags and slots with a modelling knife to anything like<br />
the same precision. Everything slots together perfectly and can be secured with a<br />
few spots of cyano. The standard motor simply screws to the front bulkhead. I<br />
was able to fabricate a thin ply mount for the Hacker (photo on previous page)<br />
which can be attached by the same screws making it simple to swap motors.<br />
Having completed the model in fairly quick time I was unable to try it out until<br />
this month (March). I wanted to check it out with the standard motor and seven<br />
cells To my amazement it took off quite rapidly from our grass strip, thanks<br />
probably to the sheep who had chewed the grass to bowling green level. Then<br />
disaster! The model was all over the place with a pronounced radio problem. You<br />
can imagine how pleased I was to get it down again after 20 secs. more by luck<br />
than judgement..<br />
I took it home , changed the receiver, the crystals and rerouted the flight battery<br />
leads away from the receiver. Unfortunately in doing so I had to move the battery<br />
pack back which meant adding some lead to the front of the motor-you can see it<br />
crudely attached with tape in the photo.<br />
The original 300 motor and gearbox, with taped on ballast<br />
Back to the field and try again. This time it flew perfectly and was capable of loops<br />
and rolls but lacked the power to climb vertically and the flight time was less than<br />
3 mins., even with reduced throttle from time to time. So, time to try the Hacker.<br />
Home again, in with the Hacker and a 9” x 4½” APC <strong>Electric</strong> prop. I had also<br />
indulged in a Thunderpower 2000 3S1P Lithium Polymer (LiPo) battery. As you<br />
will be aware you cannot charge LiPos with a standard NiCd / NiMH charger.<br />
E.F.-U.K. 19
Fortunately I have a Schulze 330d charger which I was able to upgrade to the<br />
latest version, which will cope with LiPos. Heeding all the warnings I carefully<br />
set it up to charge outside my shed and in a safe location where I could observe it<br />
from the kitchen window. Nothing burst into flames and I installed it in the battery<br />
tray under the wing.<br />
The battery tray on the underside of the Mini Laser 3D<br />
The battery pack is capable of pulling 6C, i.e. 6 times 2000 mAh = 12A. The 9” x<br />
4½” was pulling about 11A at full throttle so that should be no problem.<br />
So back to the field. The Mini Laser leapt into the air and climbed vertically. I am<br />
sure it will be capable of hovering but I shall need lots of practice. Thunderpower<br />
suggest the first flight should be limited to six minutes which was when I brought<br />
her in. The battery was barely warm and it only took about 60 mAh to restore it<br />
to full charge. I had two more flights of about five to six minutes without<br />
recharging but with only intermittent full throttle. At the end there was no apparent<br />
loss of power and the battery was still barely warm . It only took about 80 mAh to<br />
restore it to full charge.<br />
I am using the Hacker Master 18-3P speed controller which has no facility for<br />
altering the cut-off point to 2.5V/cell, below which Li-poly cells should not be<br />
taken on load (3V per cell when not on load). I have a Kontronik Jazz controller<br />
which has this facility but which is too large to fit comfortably into this model.<br />
It means I shall have to adopt an American practice to limit my flight times, but<br />
so far experience suggests that with my style of flying I could fly comfortably for<br />
ten to twelve minutes without problems.<br />
20<br />
E.F.-U.K.
I am chuffed to bits with the Mini-Laser in this set up. I am sure it can do all that<br />
anyone could require of it. My brief flights so far have been in pretty calm weather<br />
but it should cope in reasonable wind conditions. Throttled back it can be flown<br />
in a pretty small space but with full throttle it is quite fast and can do with a bit<br />
of space. Small enough to sling complete in the back of a car but do take care of<br />
that battery pack!! It is also a pretty model as I think the accompanying photos<br />
should show.<br />
E.F.-U.K. 21
Safety with LiPo Batteries<br />
by Jan Bassett<br />
Despite what a number of people may tell you Lithium Polymer (LiPo) batteries<br />
are not fundamentally unsafe, but they need to be treated with more care than<br />
NiCd or NiMH. If abused sufficiently LiPo cells can catch fire and this fire can be<br />
difficult to extinguish. The following precautions should help you enjoy using<br />
LiPo batteries without having a major incident.<br />
• The minimum safe discharge voltage is 2.5V per cell when under load, or 3.0V<br />
per cell when not on load.<br />
• When more than 2 cells in series are used, a controller with an adjustable<br />
cutout should be used and it should be set at or above 2.5V/cell.<br />
• Only charge LiPo batteries on a charger specifically design for LiPo batteries.<br />
• Always ensure you use the correct charging voltage for the cell count.<br />
• The maximum charge rate should be 1C, e.g. 0.7A for a 700 mAh cell. For best<br />
charging, low charge rates should be used where possible.<br />
• Check the charge voltage (or cell count) and current a second time.<br />
• Never leave charging LiPo batteries unattended (at any charge rate).<br />
• It is best to charge LiPo cells in an open space on a non-flammable surface<br />
(such as a brick or quarry tile) and away from flammable materials.<br />
• For long term storage it is recommended that cells are fully charged and then<br />
discharged to between 50% and 60% of their capacity.<br />
• Use connectors that can not be short circuited, or use silicon fuel tube to<br />
protect exposed connections.<br />
• Have a dry powder fire extinguisher or a bucket of dry sand within reach.<br />
• If a pack is involved in a crash or is otherwise damaged:<br />
Remove the pack from the model.<br />
Inspect the pack for damage to the wiring or connections.<br />
If necessary, disassemble the pack and dispose of any damaged cells.<br />
• Disposal of LiPo batteries:<br />
Put the pack in a safe open area and connect a moderate resistance across<br />
the c ell terminals until the cell is completely discharged.<br />
CAUTION: The pack may get extremely hot during the discharge.<br />
Puncture the plastic envelope and immerse in salt water for several hours.<br />
22<br />
E.F.-U.K.
<strong>Electric</strong> RTP<br />
by Simon Chaddock<br />
"That's not flying - it's just an electric motor whizzing round on the end of a wire".<br />
Well yes it is, but it can be so much more. Let me explain.<br />
I started investigating electric RTP nearly 30 years ago because I want to fly<br />
when I wanted rather than when the fickle UK weather allowed and as I didn't<br />
live in a baronial hall I needed models that could be flown in a normal living i.e.<br />
lines of 6' or even less!<br />
Flying on such short lines means that unless you fly pretty slowly the radial<br />
forces become significant and these forces make it very hard to fly much above the<br />
height of the centre pylon unless you have a lot of lift & power.<br />
To make matters worse if you speed up to generate the lift, the radial forces go up<br />
as well. So for successful flight on short lines I reasoned you needed small, light,<br />
control line electric RTP models.<br />
Obviously this makes the centre pylon mechanism a bit more complicated but on<br />
the plus side slow and controlled flying is, for the most part, very gentle on the<br />
models. In fact from a design point of view their construction is more like full size<br />
practice in that you try to make things strong enough to handle the flight loads<br />
but any stronger is just excess weight. In small model sizes this is actually quite<br />
difficult to do and requires much ingenuity to find light construction methods<br />
that are sufficiently rigid.<br />
The final element is gearing. Small (~1 oz. / 28g) electric motors tend to have a<br />
high 'maximum power' speeds so gearing is necessary on even a small 6" propeller.<br />
So what did I end up with A scale 'display cabi<strong>net</strong>' quality model but one that flies<br />
as well!<br />
The Fokker Triplane<br />
The Fokker DR-1 Triplane<br />
E.F.-U.K. 23
The triplane was just about the ultimate design for a compact aeroplane built<br />
around a big engine. It has a generous wing area for its span, proper cantilever<br />
wings (no rigging!) and a huge propeller! Just about perfect for a short line model.<br />
This 16" (405 cm) span, 2¼ ounce (64g) model is built to scale both inside and out<br />
(1mm (0.04”) round balsa for the fuselage steel tubing) with bungee (elastic cotton)<br />
sprung undercarriage and tail skid.<br />
The control surfaces are separate and are<br />
correctly cabled (with sewing cotton) to the<br />
stick and rudder pedals in cockpit. Of course<br />
only the elevator is free to move so the control<br />
line bell crank is simply linked to the stick,<br />
the cotton cables do the rest. Pretty cool!<br />
The motor is geared 2.5:1 to a scale (in both<br />
diameter and pitch) carved balsa propeller and<br />
as a final touch the nine cylinder Oberursel<br />
inside the cowling goes round with it!<br />
The nose section & dummy motor<br />
The Martin Baker MB5<br />
Just to complete the picture it also flies very<br />
well and can 'hang on its prop' just like the<br />
original. And yes, control line RTP is gentle.<br />
This most delicate of models was built in 1969,<br />
flown at that year's Model Engineer Exhibition<br />
in London and its still flies 34 years on!<br />
Not many people are even aware that Martin Baker (of ejection seat fame) built<br />
aircraft. Their final design was an impressive looking fighter with short broad<br />
wings and a Rolls Royce Griffon turning a 6-blade contra-rotating propeller.<br />
24<br />
The Martin Baker MB5<br />
E.F.-U.K.
Clearly this could not be scale construction but to look right it had to be all sheet<br />
covered (except the elevator and rudder which were fabric covered on the original!).<br />
The fuselage consists of 1/32 (0.8mm) planking over 'skeleton' frames. The wing is<br />
similar with 1/32 sheet ribs. The balsa wing spar was really only required for<br />
construction as the skin takes all the loads.<br />
Double curve planking in such thin sheet is not for the faint hearted but the final<br />
result looks great and is remarkably strong and light. With two motors, one for<br />
each prop, this 24" (61cm) span models still weighs only 4½ ounces (128g) all up.<br />
Compared to the Triplane it<br />
flies quite fast (only about<br />
12 mph but on 6’ lines it<br />
feels fast) It is also<br />
remarkable noisy as the<br />
hollow sheet monocoque<br />
acts as a sounding board for<br />
the gears, it sounds like a<br />
turboprop. It certainly turns<br />
a few heads.<br />
Of course landing requires<br />
great care just to keep all<br />
those blades clear of the<br />
ground. I have recently<br />
added springing to the<br />
undercarriage to ease the<br />
landing shocks but never<br />
The Contra-Rotating drive system of the MB5 the less the MB5 is now over<br />
25 years old!<br />
Not all my models are as complex, here are just a few:<br />
A sort of Liberator.<br />
It looks very<br />
impressive in the<br />
air but has to be<br />
stored carefully to<br />
ease the load on<br />
the wings.<br />
Each of its four<br />
motors weighs<br />
more than the<br />
whole airframe!<br />
E.F.-U.K. 25
The sort of Liberator<br />
Flying Brick.<br />
For a display I gave at a local school I designed this twin-engined transport to<br />
carry a full size house brick (or rather a very light replica) and drop it in flight. A<br />
3rd motor works the rear door and the full span flaps. The rear view shows its<br />
cavernous interior.<br />
Fairy Gan<strong>net</strong><br />
A model built for carrier deck landing. By careful selection of the arrestor system<br />
it is possible within the space of a 8 foot 'deck' marked out on the floor, to land &<br />
pick up the wire, stop, let the wire pull the model back to the start, drop the wire<br />
and take off again. It's very impressive!<br />
<strong>Electric</strong> RTP has not been my only form of aeromodelling but over the years, I<br />
have had great fun designing, building and flying many different types. Of course<br />
I have had my fair share of failures but I hope this encourages people to have a go.<br />
Unfortunately I do not prepare any detailed construction plans for these models<br />
however I will try to answer any queries. My email address is<br />
simon_chaddock@hotmail.com<br />
26<br />
E.F.-U.K.
E.F.-U.K. 27
A Thrust Measuring System<br />
by Malcolm Mackenrick<br />
This is based on the design shown by Bob Smith in his talk at the last BEFA<br />
Technical Workshop.<br />
The only modification I have built in is to have the horizontal bar variable in<br />
length. This allows the horizontal bar to be adjusted so that it is the same length,<br />
from the pivot, as the height of the propeller(s) above the pivot. Thus the thrust<br />
reading given on the scale does not need to be compensated for the length difference<br />
as the scale reads true trust.<br />
The inner arm can be a solid bar or a tube if it is sufficiently rigid. Each of the<br />
rods must be sufficiently strong to withstand the maximum thrust you want to<br />
measure without any significant deflection.<br />
Whatever the bend the weight of the model moves relative to the axle and this will<br />
affect the result, if the is too large the error can be significant. The outer tube is<br />
best cut at the end to allow it to clamp the inner rod without too much force.<br />
28<br />
Above and Top Right: Drawings of the Thrust Testing Rig (drawn by Jan Bassett)<br />
E.F.-U.K.
The drawing shows a “penny” washer at the end so that the distance from the<br />
pivot can be set accurately. If using a tube it is best filled with a car body filler or<br />
epoxy and micro-balloons. A hole is drilled in the end a self tapping screw inserted.<br />
Immediately Above and Overleaf: Models being tested<br />
E.F.-U.K. 29
The model mounting platform has 4 hooks at the lower corners and a length of<br />
bungee cord is thread through. This allows the model to be very easily strapped<br />
on to the platform. If a large number of “turns” of cord are used there should be<br />
no excessive pressure on the model. Some foam padding can also be affixed to the<br />
platform to prevent damage to the lower sides of the model.<br />
If the scales move too much during the test, the weight of the model will again<br />
move relative to the axle. Therefore it is recommended to use an electronic scale<br />
as they move a minimal amount when the load is applied. These also have the<br />
advantage of a settable zero point (tare) which means that you don’t have to use<br />
a counterbalance or deduct the initial weight displayed. Ideally the arm be horizontal<br />
as it rests on the scales.<br />
The main axle is suspended at each end by a ball race, which must have relatively<br />
low friction or it will affect the results. If the ball races you have are packed with<br />
thick grease this will need to be soaked out before use. If you wish a light oil can<br />
be used to prevent rust, as long is it doesn’t thicken.<br />
The easiest way to get the horizontal distance the same as the vertical is to tie a<br />
piece of cord around the axle. The slider clamp is released and the string is held<br />
upright and the position of the thrust line marked (with your fingers). The string<br />
is then laid flat and the slider adjusted to the same position and the clamp tightened.<br />
It is wise to put a block under the rear of the horizontal arm to prevent the whole<br />
thing tipping backwards if knocked, and potentially dinging the tail of the model.<br />
30<br />
E.F.-U.K.
E.F.-U.K. 31
MAIL ORDER MODEL SUPPLY<br />
GOLD PLUGS Ideal for Speed 400/600<br />
2mm plug 75p; cuts into two giving one plug/socket<br />
2mm solder socket 43p. 2mm plug and a 2mm socket £1.15<br />
Lightweight 2mm plug and socket 55p; Max 15A motor current draw<br />
Spares. 2mm light plug 40p. 2mm light socket 20p<br />
Pack of red/black shrink: 3.2mm or 4.8mm 50p<br />
GOLD PLUGS 600 or larger motor<br />
4mm plug 90p; cuts into plug/socket. Very low resistance<br />
4mm hollow plug and a separate 4mm solder socket £1.15<br />
Spares. 4mm hollow plug 85p. 4mm solder socket 43p<br />
Lightweight 4mm plug and socket 75p; Max motor current 35A suggested<br />
Spares. 4mm light plug 55p. 4mm light socket 25p<br />
Pack of red/black shrink: 6.4mm £1.25: 4.8mm 75p<br />
Providing that you bear in mind the suggested amp ratings all the 2mm and 4mm plugs are<br />
interchangeable. All fit any of the same size.<br />
EXTRA FLEXIBLE WIRE. 0.5mm 2 , 129 strands, Max 10A, 35p/metre<br />
Red or Black or White. Park Flyers etc. or servo extensions.<br />
EXTRA FLEXIBLE WIRE<br />
Supplied in packs of 1 metre of red and 1 metre of black, i.e. 2 metres of wire<br />
0.75mm 2 , 196 strands; ideal for weight saving, Max 15A, £1.00/pack<br />
1.00mm 2 , 258 strands; ideal for weight saving for speed 400, Max 19A, £1.40/pack<br />
1.50mm 2 , 378 strands; ideal for speed 400, £2.00/pack<br />
4mm 2 , 1036 strands; £3.50/pack<br />
SILICONE INSULATED WIRE. Pack of 1 metre of red and 1 metre of black<br />
1.5mm 2 , 378 strands. £2.50<br />
2.5mm 2 , 651 strands. £3.00<br />
All wire can be cut off the roll, in longer lengths if required.<br />
CELL HEATSHRINK metre lengths<br />
25mm 50p; suits single AAA or AA cells or any same size<br />
48mm 75p; suits single sub C cells/sticks or packs of dumpy 600<br />
65mm 85p; suits 1700 or 2000 packs, also RC oblong sticks etc.<br />
94mm 95p; suits double deck packs (1700 etc.)<br />
All sizes layflat width, supplied in clear. 48mm available in opaque blue also.<br />
WIRE HEATSHRINK metre lengths<br />
1.6mm 50p; 2.4mm 60p; 9.5mm £1.00. Black only<br />
3.2mm 75p; 4.8mm 80p; 6.4mm 95p. All in red or black.<br />
ALL ORDERS PLUS POSTAGE: 60p UK; £1.10 Europe; £1.70 World<br />
M. E. DONKIN, 37 WYDALE ROAD, OSBALDWICK, YORK, YO10 3PG<br />
Tel/Fax 01904 414738. Mobile 0771 202 8329.<br />
E-mail: michael@moms63.freeserve.co.<strong>uk</strong><br />
32<br />
All messages - an attempt will be made to contact you. (I work shifts)<br />
Computer faxes must send start signal before my fax will respond!<br />
E.F.-U.K.
Index of EF-UK Issues 60 to 76<br />
Originally compiled by Maurice Brett & updated by Jan Bassett<br />
The BEFA and EF-UK is indebted to Maurice Brett for the many hours which<br />
he devoted to compiling the original index for the benefit of all our members.<br />
We hope Please note that many back issues of the magazine are no longer<br />
available - please see the current issue of EF-UK for the latest list.<br />
If you specifically require an article from a back issue that is unavailable, then<br />
a re-print of the article MAY by contacting the Editor EF-UK using the contact<br />
details in the latest EF-UK or via email at editor@befa.org.<strong>uk</strong><br />
Subject<br />
Title Author(s) Issue Pages<br />
Aerial Photography<br />
Aerial Photography follow-up Franz Stockinger 67 24 - 27<br />
Aerial Photograpy - My Way John Price 75 53 - 59<br />
EPPRA - <strong>Electric</strong> Powered Photo Recce Aircraft Don Stanley 65 53 - 54<br />
ROCCA - Remote Control Camera Carrying Aircraft Mike Pitchers 71 72 - 76<br />
Airships<br />
MB-1 Blimp Dick Comber 65 27 - 33<br />
Batteries<br />
KAN 1050 NiMH Cells Jan Bassett 76 54 - 55<br />
New Cells Tested The Editor 60 62<br />
Non-rechargeable Lithium Cells & Park Flyers Dick Comber 68 16 - 17<br />
Sanyo Nickel Metal Hydride Cells analysed Gordon Tarling 63 37 - 43<br />
BEFA General<br />
AGM 2000 Report Bob Smith 63 06 - 07<br />
AGM 2001 Report Bob Smith 65 15 - 16<br />
AGM 2002 Report Bob Smith 68 07 - 09<br />
AGM 2003 News Jan Bassett 72 06 - 07<br />
AGM 2004 News Jan Bassett 76 06<br />
BEFA / EF-UK Survey Results BEFA Committee 61 66 - 70<br />
Index of EF-UK Issue 60 to 76 Maurice Brett & Jan Bassett 76 33 - 40<br />
Survey Results The Editor 60 10<br />
Your New Techie Alan Bedingham 68 10 - 11<br />
Book Reviews<br />
Last Talons of the Eagle by Hyland & Gill Eddie Wild 60 21 - 22<br />
Building Techniques<br />
Experimenting with alternative Modelling Materials John Norman 65 18 - 20<br />
Gravity, the Enemy Eric Leadley 63 56 - 57<br />
Sniff the Dope! David Theunissen 76 43 - 51<br />
E.F.-U.K. 33
Building Techniques (continued)<br />
Wing Stress Neil Stainton 72 33<br />
Competitions<br />
BEFA League 1999 The Editor 60 75 - 76<br />
BEFA League 2003 Dave Perrett 73 74 - 75<br />
BEFA Leagues 2000 - Results The Editor 64 35 - 36<br />
BEFA Leagues 2001 - Report Bob Smith 65 16 - 17<br />
BEFA Leagues 2001 - Results Bob Smith 67 18 - 19<br />
BEFA Leagues 2002 - Report Dave Perrett 70 62 - 63<br />
BEFA Leagues 2002 - Results Dave Perrett 72 32<br />
BEFA Leagues 2003 David Perrett 75 31 - 35<br />
<strong>Electric</strong> World Championships Bob Smith 73 50 - 51<br />
Electroslot League, Middle Wallop 2001, Report John Brinkler 66 56 - 63<br />
Fun-Fly Competition Idea John Bowerman 72 28 - 31<br />
Rules for Electroslot and E400 league - 2001 Season Robert Mahoney 64 30 - 35<br />
Stand-off Scale <strong>Electric</strong> Dave Chinery 61 32 - 38<br />
World Championships Trophy Appeal Bob Smith 76 41 - 42<br />
World Championships Update Bob Smith 76 07 - 08<br />
Ducted Fan Models<br />
EDF - The Way Ahead! Chris Golds 69 13 - 19<br />
EF-UK<br />
EF-UK Index - Part 2 Maurice Brett 60 63 - 68<br />
<strong>Electric</strong>s<br />
Automatic Battery Discharger Design Jan Bassett 63 44 - 45<br />
Measurement of high values of electric current Nick Fitton 67 08 - 13<br />
Simple Current-Measuring Shunt John Bunting 63 23 - 24<br />
Electronics<br />
Measuring In-flight Prop & Gearbox performance - Pt 1 Don Stanley 62 59 - 63<br />
Measuring In-flight Prop & Gearbox performance - Pt 2 Don Stanley 63 46 - 50<br />
Multi-Outlet Trickle Charger - building project Ed Martin 60 51 - 53<br />
Fly-In<br />
Aspach 1999, Adventure to Gordon Tarling 61 10 - 25<br />
Bath SpaRCS Colerne <strong>Electric</strong> Fly-In 2002 Jan Bassett 70 52 - 59<br />
Bath SpaRCS <strong>Electric</strong> Fly-In 2001 at Colerne Airfield Jan Bassett 67 20 - 23<br />
Blackpool & Fylde 1999 John Norris 60 57 - 61<br />
BMFA Northern Area / Pandas Fly-In 2003 John Thompson 75 48 - 51<br />
BMFA Northern Area Indoor Fly-In John Thompson 73 44<br />
BMFA Southern Area 2000 Andy Palmer 63 53 - 55<br />
BMFA Southern Area 2001 Eddie Cowes 67 32 - 35<br />
BMFA Southern Area 2002 Jan Bassett 69 57 - 60<br />
34<br />
E.F.-U.K.
Fly-In (continued)<br />
Inter-Ex 1999 - Nederweert (14th) Steve Webb 60 26 - 34<br />
Inter-Ex 2000 - Ostrach Steve Webb 64 21 - 23<br />
Leamington Spa 1999 The Editor 60 15<br />
Middle Wallop 2001 John Brinkler 66 29 - 45<br />
Middle Wallop 2003 Jan Bassett 74 63 - 66<br />
NEAT Fair 2000 John Anderson 64 08 - 12<br />
NEAT Fair 2001 John Anderson 67 59 - 69<br />
NEAT Fair 2002 John Anderson 71 54 - 61<br />
NEAT Fair 2003 John Anderson 75 36 - 45<br />
North London <strong>Electric</strong> Open Day Brian Boughton 74 45 - 56<br />
Phoenix MFC All <strong>Electric</strong> Fly-In 2002 Andy McQuat 70 13 - 19<br />
Pillerton Hersey 2000 - the Millenium Year Robin Andrew 65 13 - 14<br />
Pillerton Hersey 2001 Robin Andrew 68 49 - 50<br />
Pillerton Hersey Fly-In 2003 Robin Andrews 75 22 - 26<br />
Porz Scale Weekend 2002 Brian Lawrence 70 21 - 25<br />
Traunreut 2002 David Theunissen 69 42 - 56<br />
Various 2000 - Millenium Roundup - Colour The Editor 61 39 - 46<br />
Wizard Prang! (Dambusters event) David Chinery 73 52 - 62<br />
Woburn Abbey Fly-In 2003 Jan Bassett 74 67 - 69<br />
Helicopters<br />
Piccolo, Living with the John Jackson 72 17 - 22<br />
Indoor Flying<br />
Flying in Indy Rom Muryn 73 38 - 40<br />
Inter<strong>net</strong><br />
On-Line Scene The Editor 60 56<br />
Meetings<br />
BEFA Technical Workshop 2000 Dave Chinery 64 25 - 29<br />
BEFA Technical Workshop 2001 Bob Smith 67 46 - 51<br />
Dortmund 2000 Über Ales! Dave Chinery 65 06 - 10<br />
Meters<br />
Thrust Measuring System Malcolm Mackenrick 76 28 - 31<br />
Miscellaneous<br />
Diary of 2 complete beginners' and a beautiful summer Nick Chudley 75 17 - 21<br />
<strong>Electric</strong> Conversion, An John Norman 74 25 - 28<br />
Proposed Silent <strong>Flight</strong> "A" Test for <strong>Electric</strong> Gliders Robert Mahoney 64 05 - 07<br />
Model Kits<br />
Blue Max, The John Stennard 72 64 - 65<br />
Chorus Gull - conversion to <strong>Electric</strong> Trevor Hewson 70 41 - 46<br />
Electro Arco-Wotto Ray Donno 70 50 - 51<br />
E.F.-U.K. 35
Model Kits (continued)<br />
Elipstik from Modelair-Tech John Digby 62 51 - 59<br />
F.F.X. Park Fighter Ian Savage 68 12 - 15<br />
Fokker D VII from Foamworks - Part 1 Jan Bassett 68 51 - 55<br />
IFO Mk 3 Review Neil Stainton 62 26 - 30<br />
Little Hor<strong>net</strong> - Review Robert Rauer 62 31 - 33<br />
Modification to a DB <strong>Electric</strong> Moth John Warman 61 50 - 53<br />
Mouse by Andrea Braun Modelltecknik - Review Gordon Tarling 62 13 - 22<br />
Mouse Reviews Neil Stainton 62 22 - 26<br />
Multiplex Cargo Review Jan Bassett 65 24 - 26<br />
Need a handy, tough little Park Flyer Join the Cub! Brian Rawnsley 72 39 - 43<br />
RBS Kits Microbipe - Review David Jowers 62 34 - 43<br />
RCS Technik Tiger Moth Robin Tuff & Dick Comber 67 52 - 58<br />
Ripmax Hellcat Slim - Review John Anderson 60 11 - 15<br />
Robbe Aero Commander Dick Comber 63 15 - 22<br />
Sky Rider Toy Glider - Conversion to <strong>Electric</strong> John Digby 60 35 - 38<br />
Thunderbolts are GO! Dave Chinery 65 34 - 44<br />
T-IFO, Introducing the John Stennard 68 30 - 33<br />
Xtra-Wot - Conversion to <strong>Electric</strong> Paul Cook 71 31 - 36<br />
Zagi-FiXX, A Rom Muryn & Jan Bassett 73 45 - 49<br />
Model Plans<br />
And Now (Free Plan) David Theunissen 68 34 - 38<br />
Birdy (free plan) Mick Payne 71 37 - 46<br />
<strong>Electric</strong> Hovercraft (Free Plan) Nick Hughes 67 36 - 45<br />
FlexiFlyer Jan Bassett 68 25 - 29<br />
Marti<strong>net</strong>, The Stuart Ord 72 58 - 59<br />
Meet the Airtimers (Free Plan) Tony Long 70 34 - 40<br />
Purple Lark (Free Plan) Mick Payne 63 30 - 36<br />
Models<br />
400 line of Models Chris Golds 71 11 - 21<br />
Airco D.H.2 - Part 1 Jan Bassett 66 19 - 21<br />
Airco D.H.2 - Part 2 Jan Bassett 67 28 - 30<br />
Airco D.H.2 - Part 3 Jan Bassett 70 20<br />
Airco D.H.2 - Part 4 Jan Bassett 71 22 - 24<br />
B-24D Liberator Robin Fowler 71 28 - 30<br />
Bigtimer Tony Long 74 43 - 44<br />
Brian's Blenheim Brian Leadley 61 54 - 57<br />
Dakota Tales Trevor Hewson 69 23 - 34<br />
Different "FlexiFlyer" Bernie Winters 70 48 - 49<br />
<strong>Electric</strong> Eighty (enlarged Super 60) Brian Squelch 71 62 - 68<br />
36<br />
E.F.-U.K.
Models (continued)<br />
<strong>Electric</strong>-Powered Gliders - Pt 1 Bob Smith 63 09 - 15<br />
<strong>Electric</strong>-Powered Gliders - Pt 2 Bob Smith 64 13 - 18<br />
<strong>Electric</strong>-Powered Gliders - Pt 3 Bob Smith 65 45 - 52<br />
<strong>Electric</strong>-Powered Gliders - Pt 4 Bob Smith 66 22 - 28<br />
Fun with a B-29 Mike Smallridge 73 30 - 35<br />
Gibberwing, Wringlet, Flying Circlus & Boob Toob Steve Webb 60 42 - 50<br />
Inspiration - models from the 2002 shows Jan Bassett 72 66 - 72<br />
Ivan's Lanc - part 1 Mikie Pirie 74 57 - 62<br />
Killer Diller John Norman 70 60 - 61<br />
Making of Sally B, The Ivan Goodchild 74 29 - 36<br />
Mini 3D flying with LiPo cells David Perrett 76 18 - 21<br />
Park Flying - A whole new way to start the day Brian Rawnsley 66 52 - 55<br />
Parky, A Rob Ireland 69 20<br />
Pico-Stick developments Brian Rawnsley 72 60 - 61<br />
Sunday Flyer, Electrifying the Mike Pirie 69 61 - 62<br />
Tale of a Pig's Ear Baden Austin 63 27 - 29<br />
Wattage F-22 Raptor Rob Ireland 75 46 - 47<br />
Worker Bee Trevor Hewson 61 57 - 62<br />
Models - Ducted Fan<br />
FanJet Trainer & Vampire John Stennard 72 51 - 52<br />
Messerschmitt Me 262 Schwalbe Christian Hoffman 72 44 - 50<br />
Motor Mounting<br />
Simple Motor Mount System, A M D Mackendrick 72 62 - 63<br />
What to do with your Motor Tony Long 60 23<br />
Motors<br />
Haggle of Hackers Bob Smith 66 46 - 51<br />
Maxi AXI David Chinery 73 63 - 69<br />
Mighty Midget - indoor motors Bob Smith 61 26 - 30<br />
Model Motors MV2020/20 Bob Partington 72 36 - 38<br />
TorqueMax LRK DIY Brushless Motors Jan Bassett 68 39 - 48<br />
Trials on Speed 400 Motors Malcolm Mackendrick 75 52<br />
Personal Experiences<br />
I Join the ATA (Ancient & Tatty Aeromodellers) Nick Fitton 60 16 - 20<br />
Ill-fated career of a Me 109 John Norman 72 53 - 57<br />
Man Carrying Balloons & <strong>Electric</strong> <strong>Flight</strong> Alan Cole 76 52 - 53<br />
Novice's Tale Mike Christensen 64 19 - 20<br />
Starburst, Flying the Nick Fitton 69 35 - 41<br />
Propellers<br />
Ramoser varioPROP Jan Bassett 68 21 - 24<br />
E.F.-U.K. 37
Radio<br />
Channel 64 - A problem Gordon Tarling 66 09 - 12<br />
Tip to Save your Fingers Eric Leadley 60 22<br />
Readers' Models<br />
A10 Warthog Ivan Goodchild 73 24<br />
Aerobatic foamies Joel Trotter 74 17<br />
AFF Alpha Jet EDF Jan Bassett 73 28<br />
Aqua Sport Floatplane Rich Flinchbaugh 71 26<br />
B-24 Liberator Robin Fowler 66 14<br />
Bae Hawk John Anderson 73 19<br />
Balsacraft Bristol Blenheim Mike Pirie 72 13 - 14<br />
Bear in the Air Adrian Burge 67 16<br />
Black Magic Mike Sharp 62 68 - 69<br />
Black Magic Eric Leadley 67 15<br />
Black Magic - enlarged to 84" Colin Boast 66 17<br />
Bora - 61" Hubert Fehenberger 69 22<br />
Bristol Beaufighter (shots by Graeme McFarlane) Ivan Goodchild 75 10<br />
Britton-Norman Trislander R H Fowler 68 18<br />
Comper Swift Bill MacLeod 74 24<br />
Comper Swift (1/4 scale) Denis Bannister 75 09<br />
Crossfire David Jowers 61 47 - 48<br />
Crossfire Jan Bassett 65 23<br />
CSD Switchblade Jan Bassett 75 16<br />
DB Sopwith Pup Adrian Burge 67 16<br />
DB Tinker Adrian Burge 67 17<br />
de Havilland DH-104 Devon Robin Fowler 66 13<br />
Dreamboat seaplane Rich Flinchbaugh 73 14<br />
Drunie Trubulent (1/3 scale) Anthony Hill 73 17<br />
Electroglide Dick Godden 60 73<br />
Elfi Bill MacLeod 74 23<br />
Estes T-25 Centurian Jan Bassett 75 15<br />
Flair Bristol F2B Fighter Anthony Hill 73 16<br />
Flair Fokker D VII Denis Bannister 75 09<br />
Flair Magnitilla Ken Nixon 60 71 - 73<br />
Flair Me 110 - 65" David Jowers 60 74<br />
FlexiFlyer Bernie Winters 73 15<br />
Flying Wing Dick Godden 72 11<br />
Flying Wings Eric Leadley 66 16<br />
Four-Star 40 Bill MacLeod 74 22 - 23<br />
GAF Nomad Rob Ireland 66 15<br />
38<br />
E.F.-U.K.
Readers' Models (continued)<br />
Grumman Wildcat Rob Ireland 73 20 - 21<br />
Hangar Rat Bernie Winters 73 15<br />
Heinkel He111 (shots by Graeme McFarlane) Trevor Standard & John Ranson 75 11 - 12<br />
Henschel 129B Anthony Hill 73 17<br />
Hercules Bill Macleod 73 22 - 23<br />
Hergt Monoplane Bill MacLeod 74 21<br />
Hovercraft (free plan in EF-UK) Mike Pirie 74 18<br />
Hurricane - 35" John Miller 60 69 - 70<br />
Little Tiny Jan Bassett 66 18<br />
Luscombe Monocoupe 218 Mike Moore 74 19<br />
Macro Blaster (enlarged) Bob Brown 65 21<br />
Me 109 John Anderson 73 19<br />
Mosquito FB VI - 128" 1/5th scale Franz Schmid 67 14<br />
Mulitplex Twin-Jet Mike Pirie 72 12<br />
Multiplex Cargo finished as a B-17B Martyn Lea 68 20<br />
Multiplex Kranich powered glider Jan Bassett 73 29<br />
Multiplex Pico Cub - highly modified Richard Haywood 66 15<br />
Multiplex Twin-Jet - modified Jan Bassett 65 21 - 23<br />
Mystic Ivan Goodchild 73 26<br />
Nano Gnat Stuart Ord 72 15<br />
Nemesis Stuart Ord 72 16<br />
Partenavia P-68 Victor (from the Radio Modeller plan) Colin Boast 66 18<br />
Piaggio P-136 L2 Seaplane Rich Flinchbaugh 71 27<br />
Pico-Jets Martyn Lea 68 19<br />
Pico-Stick Mark Christensen 74 24<br />
Pushy Galore (enlarged) Franz Stockinger 71 25<br />
RAF SE5a (1/4 scale) Anthony Hill 73 16<br />
REM Eagle Ornithopter Jan Bassett 75 14<br />
Royal Gull seaplane Rich Flinchbaugh 73 14<br />
Short Scion - 45" John Miller 60 70 - 71<br />
SIG Cub (1/4 scale) Ivan Goodchild 73 27<br />
Simprop Taube ARTF Bill MacLeod 74 21<br />
Smooth-E Stuart Ord 72 15<br />
Sortakhoi Bill MacLeod 74 20<br />
Spartan John Anderson 73 18<br />
Spitfire (shots by Graeme McFarlane) Jogn Ranson 75 13<br />
Stearman Ivan Goodchild 73 25<br />
S<strong>uk</strong>hoi 26SP - 32" Chris Wright 60 74<br />
Taylorcraft Floatplane Rich Flinchbaugh 71 27<br />
E.F.-U.K. 39
Readers' Models (continued)<br />
Twin-Jets Martyn Lea 68 19<br />
V1 flying bomb (shot by Graeme McFarlane) Ivan Goodchild 75 12<br />
Veron 'Deacon' Dennis Coe 61 48 - 49<br />
Viking (vintage) Stuart Ord 72 16<br />
Voster Hercules Mike Pirie 72 14<br />
Wattage "Reno Racer" Stan Rose 75 14<br />
XP-27 Twinshooter John Anderson 73 18 - 19<br />
ZAGI Converson Peter Bragg 62 64 - 67<br />
RTP<br />
<strong>Electric</strong> RTP Alan Cole 76 23 - 26<br />
Safety<br />
It's a Breakthrough - Comment on <strong>Flight</strong>line Safety Alan Bedingham 60 39 - 41<br />
Lead-Acid Battery Safety David Andrews 73 07<br />
Safety and Frequnecy Control The Editor 62 08<br />
Safety with LiPo Batteries Jan Bassett 76 22<br />
Speed Controllers<br />
Preset Speed Controller for Free-<strong>Flight</strong> models, A John Bunting 72 73 - 75<br />
Sudden 'ush (Multiplex Rondo) David Chinery 73 36 - 37<br />
Techniques<br />
<strong>Electric</strong> Piggyback (glider carrying) John Stennard 71 69 - 71<br />
Rolled ply fuselages Mike Payne 62 70 - 73<br />
Stiffer Foam - Balsa Wings John Hunt 61 75<br />
Tips<br />
Battery Cooler John Anderson 69 21<br />
Günther Propeller Adaptor The Editor 64 24<br />
Make your IFO or Mini-IFO more crash resistant Dr Allan Levi 67 31<br />
Make your own Safety / Charging System John H Price 61 71 - 74<br />
Plastic Wheel retaining washers John Thompson 68 11<br />
Sanding Sponges Mike Donkin 63 43<br />
TLC from your TLO Alan Bedingham 70 26 - 28<br />
TLC from your TLO Alan Bedingham 71 47 - 51<br />
TLC from your TLO Alan Bedingham 72 23 - 27<br />
TLC from your TLO Alan Bedingham 73 70 - 73<br />
TLC from your TLO Alan Bedingham 74 37 - 42<br />
TLC from your TLO Alan Bedingham 75 27 - 30<br />
Note: This index only covers EF-UK issues 60 to 76 and is additional to the index<br />
for issues 28 to 59, printed in EF-UK issue 59. The full index is available as an<br />
Acrobat file (.pdf) in the EF-UK page on the BEFA Website (www.befa.org.<strong>uk</strong>).<br />
Hard copies available from the Editor, please send a C5 S.A.E. and £2.<br />
40<br />
E.F.-U.K.
World<br />
Championship<br />
Trophies Appeal<br />
by Bob Smith<br />
I would think that most <strong>Association</strong> members are by now aware that the World<br />
Championships for <strong>Electric</strong> <strong>Flight</strong> in the F5B and F5D categories are to be held<br />
this year in the U.K., specifically in York on the 6th to the 15th August.<br />
In fact, you will find a brief article elsewhere in this edition giving fuller details of<br />
the event and ways in which members might volunteer to help the organisers.<br />
I am wearing 2 hats with regard to this matter as I am both Treasurer of BEFA<br />
and Chairman of the World Championship Organising Committee. It is in this<br />
latter role that the BEFA Committee has given permission to write in our magazine.<br />
All aeromodelling world championships are held under the auspices of the hosting<br />
National Governing Body (in our case the BMFA), and the International<br />
Aeromodelling Commission (CIAM).<br />
The formal awards to Championship winners and to second and third place<br />
competitors (both individual and team) take the form of medals and certificates<br />
which are FAI/CIAM awards but are actually purchased by the Championship<br />
Organisers and the costs included in the overall budget.<br />
With regard to World Championship Perpetual Trophies, these are often of some<br />
historical significance, for example, the Wakefield Trophy for the F1B category,<br />
but electric flight is a very recently established category and no such trophies<br />
exist at present.<br />
BEFA would like to correct this situation, and I have been given authority to<br />
start an appeal amongst our membership with the express purpose of funding the<br />
purchase of two trophies.<br />
If the appeal is successful the trophies will be donated, on your behalf, to CIAM<br />
and will be known as the <strong>British</strong> <strong>Electric</strong> <strong>Flight</strong> <strong>Association</strong> F5B World<br />
Championship Trophy and the <strong>British</strong> <strong>Electric</strong> <strong>Flight</strong> <strong>Association</strong> F5D World<br />
Championship Trophy.<br />
This, of course, is a one-off appeal. Any funds raised will be put towards the<br />
purchase of a suitable trophy for the F5B event in the first place. If sufficient<br />
funds are raised then an additional trophy will be purchased for the F5D event. If<br />
insufficient funds are raised to purchase either trophy then the balance will be<br />
placed into the BEFA General Account and used for the benefit of the membership.<br />
E.F.-U.K. 41
So how can you contribute to this appeal<br />
I will gratefully receive anything you would like to contribute in whatever way<br />
you find most convenient, but the best and simplest way is to send me a cheque for<br />
whatever sum you consider appropriate.<br />
There is a submission form on the centre pull-out pages which I would like you to<br />
complete for our records. My address is also given there.<br />
If you wish then a photocopy or a handwritten copy will be fine. I will publish<br />
details of the success (or otherwise) of the appeal both in EF-UK and on our<br />
website and will also publish a full list of subscribers and subscriptions on<br />
completion of the appeal. Anyone who indicates on the form that they wish their<br />
name or their subscription sum to be anonymous will have their wish respected.<br />
I do hope that you will be able to support us in this matter. It is an opportunity to<br />
place the name of our <strong>Association</strong> in permanent international record, and although<br />
it is asking for additional financial support, this is a unique opportunity to get<br />
BEFA to the forefront of the International <strong>Electric</strong> <strong>Flight</strong> scene.<br />
Thank you for your consideration on behalf of the BEFA Committee, the World<br />
Championship Organising Committee, and all participants in the 2004 <strong>Electric</strong><br />
<strong>Flight</strong> World Championships.<br />
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Enquiries & overseas sales: mrandrewgibbs@yahoo.com<br />
E.F.-U.K.
Sniff the Dope!<br />
By David Theunissen<br />
I'm building a new nine foot wingspan model called a Hurricane. Mine is the RAE<br />
version, not the famous WWII Hawker Hurricane. Never heard of the RAE version<br />
Well they only built one in their spare time eighty years ago so perhaps it's no<br />
surprise!<br />
This story is not so much about the plane but its covering. Silk is the Queen of<br />
covering materials. I've used it before on my '1938' vintage Dragon Fly and I still<br />
love it. Being a scale model, I wanted the Hurricane to have an authentic fabric<br />
skin. Although Solartex is easy to use it is also quite heavy, not entirely waterproof<br />
and a bit flexible. Since the original had fabric which was apparently 'doped silver',<br />
silk and dope seemed the right way to go. I also wanted to know the weight of this<br />
type of covering.<br />
Its been some time since I did the Dragon Fly and can't remember any of the tricks<br />
I had to master then. So this time I thought I would record some of my trials and<br />
tribulations so that I could remind myself never to use silk and dope again! Just<br />
kidding (or perhaps not!); read on…<br />
E.F.-U.K. 43
Step 0: Build a small test structure (e.g.: a small 'elevator' with 3 ribs with<br />
similar spacing to that on your model). Now follow all subsequent steps using<br />
this item so that you learn the technique. If you don't think you have time to do<br />
this, then give up now! These instructions should help you get it right first time<br />
but if not, peel the silk off and start again. I've only covered two planes in silk in<br />
my whole life but I can't remember how many times I covered my test piece until<br />
I was happy with the process! 'Practice makes perfect' holds true here.<br />
Step 1: Acquire some nice silk. How do you know it is nice It should be light,<br />
delicate, have a close weave and no pattern or obvious imperfections. I bought a<br />
100% silk called 'Habutae Paj' from Fabric Land in Reading (0118 9594951). It is<br />
90cm wide and cost £3.59 a linear meter. For this nine foot (2000 sq. in. wing<br />
area) model, I used most of a 10m length which would be similar for any covering.<br />
I also needed just over a litre of dope and probably used about three litres of<br />
thinners.<br />
Step 2: Reinforce the structure. If you use shrinking dope, the shrinkage can<br />
be quite severe and weak structures distort. You don't have to build in excessive<br />
strength, just a few extra balsa diagonals and the like. Things which are 'square'<br />
tend to stay that way. Things that are at an angle (e.g.: the ailerons on the Hurri)<br />
tend to compress and change shape. Things that are like step ladders can curve in<br />
the least expected ways (as did my wings where the leading/trailing edges bowed<br />
forwards leaving a curved aileron hinge line).<br />
Step 3: Prepare the model for covering. You need to apply dope to all exposed<br />
surfaces, lots of it. You do this for two reasons; one is to waterproof the framework<br />
(you apply the silk wet with water) and the other is to saturate the surface of the<br />
wood with dope. I painted one coat but this was woefully insufficient. Although it<br />
looked fine before I painted it, in reality the silk which came in contact with the<br />
wood ended up being very dry.<br />
On reflection this should come as no surprise as the doped silk is only 0.05mm<br />
thick while the balsa sheet is 1.5mm. Silk over 3mm liteply suffered the most from<br />
being too dry. I can't tell really you how many coats you need but would suggest<br />
two or three on fine-grained wood (e.g. balsa) and an additional one or two on<br />
more open grained wood (eg: liteply). I would use neat dope for this step. It is<br />
normal to sand these surfaces lightly between coats to remove the fuzz.<br />
Step 4: Prepare your materials.<br />
• Cut the silk slightly oversize; an extra inch or so all round should do. Always<br />
orientate the weave as 'square' to the structure as possible to reduce the chance of<br />
distortion. My wing was rather large so I chose to cover each half with four<br />
pieces; one pair (top and bottom) from the root to the start of the aileron and the<br />
others for the rest of the wing. This approach worked OK but I had to take extra<br />
care with the joins. More on this later. See photo below.<br />
• Dilute a quantity of dope at this time. I chose one part shrinking dope to two<br />
44<br />
E.F.-U.K.
parts thinners. Buy 5 litres of thinners from a car paint shop if you want to save<br />
some money (this can cost less than 500ml from the local DIY store). My dope is<br />
labelled 'cellulose shrinking dope' so I bought 'cellulose thinners'. The thinned<br />
solution is extremely runny and has a very low dope content (33%) which is what<br />
you want as I will explain later. All future references to 'dope' will mean this<br />
thinned solution.<br />
• I bought a 'dope' brush from a model shop. The bristles are about 10mm wide,<br />
3mm thick and 30mm long. Anything similar should do. You should only need one<br />
and you never have to clean it! Simply soak a dry stiff brush in the thinned dope<br />
solution (or neat thinners) and it will loosen up quite quickly.<br />
Step 5: Spread the silk over the framework being covered. Only do one side<br />
at a time. Align the weave as 'square' to the structure as possible. Now spray the<br />
silk with water from a (clean) detergent type bottle. The water makes the silk<br />
stick to the structure and stay in place while you stretch it. Silk is a natural fibre<br />
so it does not stretch in quite the same way as more porous substances do.<br />
However, the water can dilute or soften some natural chemicals and certainly the<br />
weaving process introduces considerable slackness. Although not apparent when<br />
dry, you will quickly see how much the silk 'expands' when you wet it. The water<br />
lubricates the fibres and helps you pull everything taught in the next step. You<br />
E.F.-U.K. 45
don't wanting it dripping but don't be too shy with the water either.<br />
Step 6: Stretch the wet silk. This is probably the most important step. You will<br />
find that you have to tug on the silk all the way round the circumference a number<br />
of times. A surprising amount of force can be required when pulling over sheeted<br />
areas. You need to pull the silk taught but at the same time retain the same<br />
tension everywhere. You want to try to keep the weave straight in all directions.<br />
You may need to spray more water if it starts to dry out. Of course at this time<br />
you can simply lift the silk and start again if it looks like the weave is becoming<br />
distorted. Try to eliminate all wrinkles. The better you do this step, the less<br />
distortion you should have later.<br />
Step 7: Adhere the edges of the silk to the structure with dope. Simply<br />
paint the dope onto the silk all the way round the perimeter. Move on to the next<br />
component while you wait for the water and dope to dry. Despite your best efforts,<br />
once the silk has dried it may have a few wrinkles. You probably don't have to<br />
worry about these as shrinking dope should come to the rescue. At this time you<br />
will normally have one half of a component covered (eg: the bottom of an elevator),<br />
the edges should be secured but the one inch excess will be flapping in the breeze.<br />
The rest of the silk will not have been doped yet.<br />
Step 8: Neaten up the edges.<br />
46<br />
E.F.-U.K.
• You typically want 8-12mm overlaps. Trim unneeded excess off neatly with<br />
scissors. Make perpendicular cuts as you would with film covering if needed<br />
to wrap around complex curves. Apply dope to these edges so that they are<br />
all completely attached, flat and no have no air bubbles. If necessary, press<br />
them down with your fingers or a rag to force them to lie flat and stick.<br />
You should now have one half covered and all edges neatly stuck down.<br />
• I mentioned earlier that I covered each side of each half wing with two<br />
pieces of silk joined along the rib where the ailerons start. Each of these<br />
were attached one at a time and allowed to dry as described in the previous<br />
steps before starting the next one. These joins need special attention when<br />
there is only a small amount of underlying structure to support the join<br />
(eg: 6mm wide cap strips in this case).<br />
• The following diagram illustrates how to do this. The edge of the first<br />
piece of silk (where it ends at the 'joining' rib) was folded in and doped to<br />
the side of the rib. If the second layer has a nice neat edge (the woven edge<br />
is best) it can overlap the first layer by as much as you want (eg: the 8-<br />
12mm suggested above). Obviously you cannot fold the outer edge of the<br />
second layer down the side of the joining rib. This is OK because the first<br />
layer of silk will support it.<br />
Step 9: Cover the rest of each component in the same way. You do this piece<br />
by piece, one at a time. You should end up with each component fully covered with<br />
dry silk and all edges sealed with dope.<br />
• When overlapping the edges of the second/top layer of silk, try to avoid<br />
fraying the edges too much and in particular letting fibres stray too far. A<br />
single fibre appears extremely insignificant at this time but is hard to<br />
sand off later and shows up more than you would like if you spray the<br />
model with a colour.<br />
• For the join in the centre of the wing (where multiple pieces are used for<br />
each side), you may find it easiest to bond the second piece of silk to the<br />
'joining' rib and letting this dry before trying to stretch the wet silk taught<br />
E.F.-U.K. 47
in other directions. If you don't do this then it tends to slip while you are<br />
tugging on the wet silk to stretch it.<br />
Step 10: Start doping the rest of the silk. Sheeted areas are easy. Simply<br />
slosh the dope on and spread it evenly. Open areas need more care. The dope<br />
serves two primary purposes. The first is to pull the silk taught and the second is<br />
to seal the weave. To achieve the first the best, the silk needs to be fully saturated,<br />
inside and out. The thinned dope is very effective in this regard. To fill the weave<br />
your instinct might be to use the dope neat (undiluted) or even to add a filler.<br />
However, the problem with these approaches is that it is too easy to 'pool' or run<br />
beneath the silk. These then leave very thick layers of dope in places which pull<br />
much tighter than other areas and leave unsightly marks and distortions when<br />
dry. Do not do this! The trick is to use the diluted dope and to paint it on while<br />
holding the silk/component vertically (see photo).<br />
Start at the top and allow the dope to run down the silk as you work your way<br />
down. Most of the excess will be absorbed by the dry silk and yield a fairly consistent<br />
coat. It does not do this entirely on its own. You need to help the dope spread by<br />
working it with the brush left and right and up and down to encourage it to<br />
spread. Try to make 'runs' disappear. This technique may yield a few runs and<br />
distortions, but at least you know they are only 33% solutions instead of 100% so<br />
the effect is much less. Once this first coat on the first half is dry, do the same to<br />
48<br />
E.F.-U.K.
the other half. You need to keep applying dope to both sides one after the other so<br />
that they pull evenly against each other. You would normally let the one side dry<br />
before doing the other.<br />
Step 11: Under-cambered airfoils. The first coat of dope should have helped to<br />
taughten the silk but may result in a gap on under-cambered wings. Force the silk<br />
to follow the 'hollow' with weights (eg: strips of wood parallel with and between<br />
pairs of ribs).<br />
Paint neat dope on the silk where it needs to adhere to the rib/cap strip. This will<br />
increase the concentration of dope at these points and should keep the silk in<br />
place during subsequent steps.<br />
Step 12: Apply the second and third coats. The second coat on each side<br />
needs to be applied in the same way as described in step 10. The weave will not<br />
have been filled by the first coat. The third coat can usually be applied with the<br />
silk flat (horizontal) as most of the weave should be filled by the second coat.<br />
Allow the dope to dry significantly between each coat (i.e.: it must look dry).<br />
However, although you should not try to rush things, it does not have to be bone<br />
dry because the next coat is always going to soften earlier ones anyway.<br />
Step 13: Add any detailing / correct any problems which may be appearing.<br />
• I made a frame and stretched some silk over one side and treated it with<br />
four coats of dope as described in the above steps. This gave me a pretreated<br />
('sized') piece of silk which I could use for patches and other things.<br />
• I mentioned that my wing bowed forwards. I added a balsa fillet along the<br />
hinge line at this time (on top of the silk) to straighten this edge. I then<br />
used the extra pre-treated silk to cover this repair. This meant that the<br />
'new' silk was at a similar state to that on the wing already and would not<br />
leave dry spots. This worked very well.<br />
• I also cut rib tapes from this silk using pinking shears. My model is a 40%<br />
scale so a 'double cut' with the shears gave me a near perfect pitch. The<br />
dope did an excellent job of holding the fibres together even when working<br />
it quite aggressively to remove air bubbles.<br />
• One wing had a slight twist so a coat of thinners on the bottom surface<br />
was sufficient to give me enough slack to bend it straight. If you need to<br />
do this, paint the thinners on quickly and try not to work the silk too<br />
hard (with the brush) or you are likely to disturb the dope seal between<br />
the weave. Correct the twist by hand and hold it while it dries. A heater<br />
can help the thinners vent off quicker.<br />
• I also peeled back parts of the aileron covering to trim some distorted<br />
balsa and simply painted the same silk back with the thinned dope.<br />
• Apply extra dope to areas that have not pulled properly taught.<br />
E.F.-U.K. 49
• Sand off any dust or stray fibres with 600 grit 'wet and dry'. Try not to<br />
expose bare silk. However, if you do, simple dope over it now or cover it<br />
well in the next step.<br />
Step 14: Apply remaining coats. The fourth coat will probably still be revealing<br />
'pin holes' in the silk. I stopped after this coat but when I painted the silk it<br />
revealed that some areas had not been completed sealed. A fifth coat is advisable<br />
when the items are to be painted or you want better waterproofing. You might<br />
like to use non-shrinking dope if things are taught enough after step 12.<br />
Other matters<br />
Well, that's about it. If you are not going to paint the dope then your job is largely<br />
done. Note that it takes a few days for the thinners to evaporate off enough to<br />
stop smelling badly. Talking of smell, the vapours are not pleasant and you must<br />
do this in a well ventilated area. The fumes will probably make you unwell if done<br />
inside a house as you will continue to breath them in for days.<br />
I experimented with adding aluminium powder to the dope to try to avoid the need<br />
for painting. However, the concentration needed seemed too high and I gave up. I<br />
thought grey dye (powder) might also be a good idea but in reality it is made up of<br />
many different colours which looked weird and did not dissolve properly in the<br />
dope. In the end I just painted the model with Blackfriars paint from my local DIY<br />
50<br />
E.F.-U.K.
shop. This is a White Spirits based emulsion and appears to have bonded well to<br />
the thinners based dope. I did not use any undercoat to save weight. The finish is<br />
by no means perfect but I think it is adequate for this model. Time will tell if this<br />
approach is durable.<br />
You may notice when you paint your first dope onto the edges of the wet silk that<br />
the doped silk turns white when it dries. This is normal and will become clear<br />
again when you dope over it with subsequent coats. The main lesson here is that<br />
wet weather has a similar effect.<br />
Dope applied in damp conditions (even onto silk which is dry) yields a white/<br />
milky finish. This is no problem if you intend painting over it but looks terrible if<br />
you intend it to be clear. So you should only dope in dry conditions if you want the<br />
'natural' finish.<br />
Weights<br />
My silk weighs about 20g per square meter (0.6 oz./sq. yard) dry. Preparation and<br />
four (thinned) coats of dope added about 32g/m 2 (0.95 oz./sq. yd.) on average, and<br />
my two coats of Silver paint added another 17g/m 2 (0.5 oz./sq. yd.).<br />
The final finish on my model and comparisons with some other options follow:<br />
Material g/m 2 oz. / sq. yd.<br />
White So'Lite 31 0.91<br />
Silver Litespan (excl. Balsaloc) 37 1.09<br />
Clear SolarFilm (no pigment) 42 1.24<br />
Silk and dope (4 coats) 52 1.53<br />
Silver SolarFilm 54 1.59<br />
Silk, dope and Silver paint 69 2.04<br />
Red Solartex 103 3.04<br />
I am pleased that it ended up being lighter than Solartex, but it really needed<br />
another coat of dope. I should probably have also used an undercoat, so it is all a<br />
bit heavier than I had hoped for. In total the covering applied the whole model<br />
weighs 290g (10oz).<br />
As you can probably tell from this marathon description, silk and dope is a great<br />
deal of work. It did not turn out as light as I had hoped but it is a nice finish and<br />
is very rigid. I will leave you to decide if it is appropriate for your models.<br />
There must be loads of people with more experience that I. My research has revealed<br />
that there are many approaches to doping silk but the approach described worked<br />
well for me and I am happy with the outcome.<br />
E.F.-U.K. 51<br />
Please let the editor know if you have more suggestions or comments. As always
Man Carrying Balloons &<br />
<strong>Electric</strong> <strong>Flight</strong><br />
by Alan Cole<br />
There is a connection between man carrying balloons & electric flight. The building<br />
which housed the Balloon School of the Royal Engineers, built 1907, is still<br />
standing. Suspended from the ceiling in one room in that building is an electric<br />
aircraft. The aircraft is not as old as the building - more like 24 than 94 years.<br />
The building stands near the main road in Farnborough, Hampshire, and after its<br />
use by the Balloon School, it became the first Headquarters of the Royal Flying<br />
Corps. Lord Trenchard had his office there for a few months. It remained RAF<br />
property until 1946 when it was transferred to the Royal Aircraft Establishment<br />
(RAE), later housing the Establishment's Museum. It was sold by the Ministry of<br />
Defence, along with the rest of the RAE Factory site and is now leased by its new<br />
owners to Farnborough Air Sciences Ltd.<br />
This historic building houses the operating headquarters of the Farnborough Air<br />
Sciences Trust (FAST) as well as their Museum. The formal RAE Museum is now<br />
in storage with the Science Museum. The one now in the Balloon School building<br />
is the work, principally, of a number of dedicated volunteers who think that the<br />
large slice of the aeronautical history of the world that was the RAE should not<br />
all be destroyed to make way for yet another office park.<br />
The aircraft hanging from the ceiling is not as big as the model of the Sally B<br />
which featured in Issue 74 of this magazine. It is about 5 ft. 6 in. (1.67 m) long<br />
with a span of 8 ft. (2.44 m). It was one of a family of Unmanned Aircraft built in<br />
the late 1970s at the RAE to investigate their use in reconnaissance - the same<br />
function as that of the Balloons of the early 1900s. Similar work had been carried<br />
on at RAE for many years - perhaps the best known example (to one of my<br />
generation) was the de Havilland "Queen Bee", based on the Tiger Moth, although<br />
there are records of much earlier work - but not electrically powered.<br />
The first models in the 1970s series were powered by 15cc Webra engines but the<br />
noise drew attention to them and the need for "Silent <strong>Flight</strong>" led to the model now<br />
on show. The motor and gearbox were developed in conjunction with Thorn-EMI<br />
and it was fitted with a 4-bladed 9” x 6” hand carved propeller. Lithium Hydride<br />
batteries were used to power the drive motor at some 160V - a large and very<br />
heavy pack which occupied most of the fuselage around the position of the C of G.<br />
A catapult or bungee launch system was used and the aircraft could be flown out<br />
of sight using radar tracking and computer control. <strong>Flight</strong>s in excess of 30 minutes<br />
were achieved. A separate NiCd pack was used for the radio control system and<br />
the payload - a video camera and transmitter. The aircraft was recovered by landing<br />
on skids on its underside.<br />
52<br />
E.F.-U.K.
From the accompanying photograph you will see that the overall layout is a pod<br />
and boom fuselage, with the wing mounted half way up the pod and the motor on<br />
the pod top driving a pusher prop - its a not dissimilar layout to that used for<br />
today's "buy this morning, fly this afternoon" models.<br />
I suppose that sort of performance could be achieved now at much less cost and by<br />
us 'amateurs', but I found it an interesting example of how things were. The FAST<br />
Museum is open to the public at weekends and houses many other items of<br />
aeronautical interest - there is part of the control system for the aforementioned<br />
"Queen Bee". Entrance is free so if you are in the area, do call in and see this early<br />
example of electric flight of model proportions, as well as the many reminders of<br />
how aeronautics developed in this country - from the days of balloons and man<br />
carrying kites. If not in the area - make a special journey, I think you'll enjoy it.<br />
E.F.-U.K. 53
KAN 1050 NiMH Cells<br />
by Jan Bassett<br />
Following discussions with Nick Kemp of Ampower (www.ampower.co.<strong>uk</strong>), I<br />
was offered the chance to test a pack of 7 KAN 1050 cells. These cells the same<br />
diameter as the Sanyo 500AR cells, are about 1.3 mm longer and around 3g per<br />
cell heavier. They are wrapped in a plain light green sleeve, which is marked with<br />
the cell type and date of manufacture. Thus the completed 7 cell pack was around<br />
4 mm longer than my 500AR packs and weighed 23g more.<br />
A standard configuration 7 cell pack of KAN 1050 cells<br />
OK, so the pack is a little bigger and heavier, but what power can I extract from<br />
it. They are rated at 15A+, so I decided that my pylon racer would be a good test<br />
bed. It is a CSD Switchblade (27” span, 118 sq. in. wing area, and a flying weight<br />
of 17 oz. with a 7 Sanyo 500AR pack) fitted with a Hacker B40-16 Short motor,<br />
Jeti JES 30 3P controller and a 4.7” x 4.7” Graupner CAM Speed propeller. The<br />
pylon racer weighs increases to 511g with the KANs, a modest 4.7% growth.<br />
The best option is to perform a direct comparison between the old (500AR) cells<br />
and the new (KAN 1050) cells. I charged a pack and ran it in motor until the<br />
initial power cutout. I then put it on discharge to find out what capacity was left<br />
in the battery pack. The average results from a couple of tests were:<br />
Cell Count & Type Max RPM Time to Cut Remaining Capacity<br />
7 Sanyo 500ARs 16800 96s 150 mAh<br />
7 KAN 1050s 17100 234s 150 mAh<br />
The first impressions from the tests were very good, no better than that excellent.<br />
The KAN cells produced a run time increase of 143% for an aircraft weight gain of<br />
only 4.7% and gave a slight power increase as well.<br />
I also ran a series of tests increasing the motor speed in 1000 RPM steps. This<br />
showed a slightly higher voltage (and corresponding) reduction in current with<br />
the KANs. They are very promising so far.<br />
I also put the packs through a 2A discharge cycle using my Schulze charger<br />
connected to my computer and plotted the graphs above. As can be seen the KAN<br />
54<br />
E.F.-U.K.
Comparision of discharge voltage vs time for 7 cell 500AR and KAN 1050 packs at 2A<br />
cells had a noticeably higher voltage and twice the duration as expected from the<br />
static tests. Interestingly enough the voltage drop-off as the KAN cells near full<br />
discharge is much rounder than the 500AR cells.<br />
I wondered whether some of this difference was due to the discharge rate for the<br />
KAN cells being 2C, where it was 4C for the 500AR cells. I tested the 500AR pack<br />
at 2C (1A discharge) and the drop-off was less pronounced, but only by a small<br />
amount and still much quicker than the KAN pack.<br />
The next stage was to flight test them to see if the performance is as good as the<br />
ground tests promised. The Switchblade was launched with the 500AR pack first<br />
as I was familiar with the handling of the model with this pack. I flew a typical<br />
flight of fast passes and large aerobatic manoeuvres and checked the flight time<br />
on landing - 2 mina and 35 secs, which is about average.<br />
I then launched with the 7 KAN 1050s. The model dipped a little on the launch, it<br />
needs a bit more airspeed due to the increased weight, but it didn’t present any<br />
problems - mental note - throw faster. Initial impressions were that the model was<br />
achieving the same level flight speed on full throttle. I flew a similar flight to the<br />
previous one, except I had to repeat the manoeuvres a number of times. I checked<br />
the timer on landing - a flight of 6 mins 37 secs - WOW over 2½ times duration!<br />
It was noticeable that the motor speed dipped towards the of the flight, due to<br />
profile of the discharge curve, however, I’d already been flying for 5 minutes or<br />
twice the duration I achieved with the 500AR pack.<br />
I was thoroughly impressed by this pack, which I will be testing in an electric<br />
glider in the near future.<br />
KAN cells and packs are available from Ampower Batteries with current prices<br />
for the KAN 1050 of £1.59 for single cells and £16.77 for a 7 cell pack. For more<br />
information or to order, see www.ampower.co.<strong>uk</strong>, email nick@ampower.co.<strong>uk</strong><br />
E.F.-U.K. 55
56<br />
E.F.-U.K.
E.F.-U.K. 57
58<br />
E.F.-U.K.
<strong>Electric</strong> <strong>Flight</strong> Calendar<br />
If you would like details of your event to appear in these pages please send full<br />
details to the Editor EF-UK, contact details on page 4. Please bear in mind that<br />
this magazine is quarterly so ensure that the details are sent in good time.<br />
For last minute information on events please check out the events list on the<br />
BEFA website (www.befa.org.<strong>uk</strong>).<br />
Dates, times and, even, locations of events can change at the last minute. You are<br />
strongly advised to check on events with the given contacts before setting out on<br />
your journey to any event.<br />
All BEFA flying events require proof of BMFA or equivalent insurance<br />
to fly. Additionally, all flying models must have been satisfactorily test<br />
flown prior to the BEFA event - NO TEST <strong>FLIGHT</strong>S ON THE DAY. As from<br />
this year it is a BEFA requirement for all pilots flying at our fly-ins to have a<br />
minimum of an ‘A’ certificate. For flying fixed wing models, any of the fixed wing<br />
‘A’ certificates are acceptable. For helicopters, a helicopter ‘A’ certificate will be<br />
required. For more details contact the Chairman, details on page 4.<br />
April 2004<br />
25th BEFA East Anglia Fly-In organised and hosted by the Phoenix<br />
Model Flying Club, Pakefield, Lowestoft. Details of the event, site<br />
and directions to it can be found on the Phoenix MFC website at<br />
www.phoenix-mfc.freeserve.co.<strong>uk</strong>/site.htm<br />
25th BEFA League event at Pillerton Hersey. The first of this years BEFA<br />
Electroslot and E400 league events. For more information contact<br />
David Perrett at d.l.perrett@btinter<strong>net</strong>.com or tel: 01455 272 297.<br />
May 2004<br />
1st<br />
9th<br />
National Indoor Arena Fly-In, see page 64 for details.<br />
Bickley MFC <strong>Electric</strong> Meet 2004, North Kent, Nr Jct 3 of the<br />
M25. For more information contact Kevin Saunders on 01732 840120<br />
or kevinsaunders@yahoo.co.<strong>uk</strong> or Brian Gaskin on 01322 865701.<br />
16th<br />
BEFA League event at Billesden, Leicester, comprising Electroslot<br />
and E400 league events. For more information contact David Perrett<br />
at d.l.perrett@btinter<strong>net</strong>.com or tel: 01455 272 297.<br />
22nd / 23rd Sandhays Scale Gliding <strong>Association</strong> 1st All <strong>Electric</strong> Fly-in,<br />
near Glentham, Lincolnshire. Grass runway (cut short). Proof of<br />
BMFA membership required. Site info and location on the SSGA<br />
website at www.ssga-online.co.<strong>uk</strong>. Camping on site available if<br />
required. Contact Gordon Veal on 01673 842581 or e-mail<br />
wgveal@global<strong>net</strong>.co.<strong>uk</strong><br />
E.F.-U.K. 59
June 2004<br />
6th<br />
13th<br />
20th<br />
60<br />
Hayes & DMAC 2004 <strong>Electric</strong> Fly In, Cranford Park, Hayes. Just<br />
Off Jct 3 of the M4. For more details contact Dave Chinery on 0208<br />
573 4687 or DavidDChinery@aol.com<br />
BEFA League event at Leamington Spa with Electroslot and E400<br />
league events. For more information contact David Perrett at<br />
d.l.perrett@btinter<strong>net</strong>.com or tel: 01455 272 297.<br />
The Chester MFC "Chas Filtness Memorial Meeting" at the<br />
Roodee (Chester Racecourse). Fun flying - all day from 9:30am to<br />
about 4pm. Vintage & Scale competitions (informal, won't interfere<br />
with sport flying). See www.chestermodelflyingclub.co.<strong>uk</strong> for<br />
more information or contact Stuart Ord on 01244 671417.<br />
20th BMFA Southern Area <strong>Electric</strong> Fly In at the Winchester MAC.<br />
Off the A272 between Winchester and Petersfield. See page 65 for<br />
more information.<br />
26th / 27th Wings & Wheels Model Spectacular at North Weald Airfield, Essex.<br />
See the advertisement on page 63 for more information.<br />
27th<br />
BEFA Float Fly by kind invitation of the Telford Model Boat Club,<br />
at Priorslee Lake, Telford, Shropshire (Adjacent to Jct 4 of the M54).<br />
The water will be shared with the Telford Model Boat Club, but there<br />
is lots of space and there are no restrictions on frequencies. Overnight<br />
camping is available, with toilets and water. More details to follow,<br />
but get cracking on those floats! For more details contact Gordon<br />
Tarling on 01895 251551.<br />
July 2004<br />
3rd BEFA League event at Middle Wallop (provisional date). Electroslot<br />
and E400 league events sharing the site with the Fun-Fly. Therefore<br />
only ODD 35MHz channels will be available, and unused<br />
channels will be returned to the fun-fly. For more information contact<br />
David Perrett at d.l.perrett@btinter<strong>net</strong>.com or tel: 01455 272 297.<br />
3rd / 4th<br />
BEFA Fly-In at Middle Wallop. We have received confirmation that<br />
JePe is to attend this fly-in again this year (for the 3rd year running).<br />
On the Saturday the site will be shared with the League event, thus<br />
only even 35MHz channels can be assured. However, it is planned<br />
that the odd channels not in use will be also available for the fly-in.<br />
On the Sunday all 35MHz frequencies will be available. See note<br />
below on competitions. As preparation continues, more information<br />
will be available on the website (www.befa.org.<strong>uk</strong>) and in the next<br />
issue of EF-UK.<br />
E.F.-U.K.
July 2004<br />
18th<br />
18th<br />
25th<br />
25th<br />
August 2004<br />
1st<br />
BEFA League event at Billesden, Leicester with Electroslot and E400<br />
league events. For more information contact David Perrett at<br />
d.l.perrett@btinter<strong>net</strong>.com or tel: 01455 272 297.<br />
BMFA Northern Area <strong>Electric</strong> Fly In at the PANDAS Club,<br />
Pontefract Racecourse, M62 Jct 32. See the poster on page 66 for<br />
more information. John Thompson can be contacted on 01924 515595<br />
or by email at johnty99@ntlworld.com<br />
Bath SpaRCS All <strong>Electric</strong> Fly-In, at RAF Colerne, Wiltshire. A<br />
large airfield site with grass & tarmac runways available. No<br />
competitions will be held. Proof of BMFA membership required.<br />
Regret there are no facilities for spectators. Pilots briefing at 10am.<br />
For more information contact Bob Partington on 01225 891 441 or<br />
email at bob.partington@<strong>uk</strong>online.co.<strong>uk</strong><br />
BMFA Midland Area Festival of <strong>Flight</strong>. R/C Scale. Other Events<br />
TBC but should be F/F Scale, R/C Pylon, R/C <strong>Electric</strong>, R/C Aerobatics,<br />
IMAC Aerobatics, C/L Speed, Team Race, Aerobatics and Combat.<br />
Barkston Heath, Nr Grantham. Contact Alf Tunnicliffe on 01773<br />
520494 or Eric Clark on eric.clark3@ntlworld.com<br />
BEFA Fly-In at the North Leamington School, Leamington Spa.<br />
See note below on competitions. As preparation progresses, more<br />
information will become available on the website (www.befa.org.<strong>uk</strong>)<br />
and will be included in the next issue of EF-UK..<br />
6th - 15th The BMFA and CIAM run World Championship Competitions,<br />
assisted by the BEFA, in F5B (<strong>Electric</strong> Motor Glider) and F5D (<strong>Electric</strong><br />
Pylon Racing) at York Racecourse. For more information see page <br />
and the website at ewc2004.users.btopenworld.com<br />
28th - 30th BMFA Silent <strong>Flight</strong> Nationals. This event will contain a<br />
Electroslot and E400 league event. For more information contact the<br />
BMFA at admin@bmfa.org or telephone them on 0116 244 0028.<br />
September 2004<br />
11th<br />
12th<br />
BMFA Northern Area Pudsey Swapmeet and Indoor Flying at<br />
the Pudsey Civic Hall, Nr Leeds. Swapmeet 8.30am - 1pm. Flying for<br />
Scale, Living Room Stick, Butterfly, Foam 200, Gyminie Cricket, Dart.<br />
Contact Gordon Warburton on 0113 285 2947 or Gwrb@aol.com<br />
BEFA Electroslot and E400 League event at York. Contact David<br />
Perrett at d.l.perrett@btinter<strong>net</strong>.com or tel: 01455 272 297.<br />
E.F.-U.K. 61
18th<br />
19th<br />
28th<br />
October 2004<br />
2nd<br />
2nd<br />
9th<br />
17th<br />
November 2004<br />
7th<br />
13th<br />
20th<br />
21st<br />
Lancing Indoor R/C Meeting at the Lancing Manor Leisure<br />
Centre, West Sussex. Contact Tom Gaskin on 01903 531653 or<br />
tom.gaskin@btopenworld.com<br />
The 20th Annual Pillerton Hersey <strong>Electric</strong> Fly-In at Home Farm,<br />
Pillerton Hersey, Warwick, CV35 0QJ. John has asked that you please<br />
come and join in the celebrations. Contact John Lewthwaite for more<br />
details on 01789 740 688.<br />
BEFA League event at Pillerton Hersey with Electroslot and E400<br />
league events. For more information contact David Perrett at<br />
d.l.perrett@btinter<strong>net</strong>.com or tel: 01455 272 297.<br />
Potters Bar Fun Fly Indoor Free <strong>Flight</strong> at the Furzefield Sports<br />
Centre, Potters Bar (M25 Jct 24). 6pm to 10pm. For more details<br />
contact Brian Downham on 0208 363 7528.<br />
Lowestoft Indoor Meeting at the Waveney Leisure Centre,<br />
Lowestoft. Mainly F/F but R/C up to 3oz. 7.30 to 10.30pm. Contact<br />
Harry Shimwell on 01502 716583.<br />
Lancing Indoor R/C meeting. See 18 September for more info.<br />
OFMAC Sunday Indoor F/F Meeting at the Castle Leisure Centre,<br />
Wallingford, Oxon. F/F Only. 10 am – 6 pm. For details contact Dave<br />
Dobson on 01491 837789.<br />
BEFA Technical Workshop at the Royal Spa Centre, Royal<br />
Leamington Spa, Warwickshire. More details to follow in due course.<br />
North London MFC Indoor R/C Meeting at the Furzefield Sports<br />
Centre, Potters Bar (J24, M25), 6pm to 10pm. For more details contact<br />
Ken on 01908 605818.<br />
Lancing Indoor R/C meeting. See 18 September for more info.<br />
OFMAC Sunday Indoor F/F Meeting. See 17 October for info.<br />
Competitions at this years BEFA Fly-Ins.<br />
In light of recent poor entries to fly-in competitions, the BEFA Committee has<br />
considered what to do this year.<br />
• The informal Scale competition will continue<br />
• The Vintage competition and AULD will not be held (the AULD is now too<br />
long, especially with the wider use of Li-Poly batteries).<br />
• An E400 mini-event will be held instead of the AULD. It will flown to the<br />
normal E400 league rules. Note: these rounds will not count to the BEFA<br />
E400 league results and awards will be presented on the day.<br />
62<br />
E.F.-U.K.
JUNE 26TH & 27TH 2004<br />
9.30 pm - 5.30 pm<br />
at North Weald Airfield, Essex<br />
(Just off Junction 7 - M11 motorway)<br />
Possibly the Best Model Show in the UK<br />
<strong>Electric</strong> Model Display Pilots welcome, Pre booking essential.<br />
Please contact us if you are interested in displaying your model.<br />
Continuous Model Flying Displays both days.<br />
Commentary by Dave Bishop (DB Sound)<br />
Over 70 Model Trade Stands<br />
Large Model Boat Pool,<br />
Model Car displays,<br />
Gigantic Modellers Bring & Buy,<br />
Bar, Refreshments<br />
Picnic Area<br />
Saturday Night Entertainment.<br />
plus lots more!!<br />
Weekend Camping / Caravans welcome<br />
Advanced Daily Tickets and Caravan / Camping Bookings available now.<br />
(Contact details below)<br />
See all about the 2003 Show on our web site<br />
www.wingsnwheelsspectacular.com<br />
Tel/Fax ++44 (0)1480 462265<br />
email: wingsnwheels@dial.pipex.com<br />
Designaction Limited, Wings & Wheels, PO Box 284, HUNTINGDON. PE28 9AE<br />
E.F.-U.K. 63
Indoor Flying<br />
at the<br />
Birmingham<br />
National Indoor Arena<br />
1st May 2004<br />
6.30 pm - 9.30 pm<br />
£7.00 per Person<br />
Flying will be arranged in Time Slots<br />
All Models over 10 ounces (285g) will be checked<br />
by the Safety Officer before flying.<br />
All BMFA Membership Cards MUST<br />
be presented at booking in.<br />
All Helicopters will fly on 35 MHz<br />
using channel 80 and above.<br />
To ensure this event is a success, we would like an idea<br />
on people taking part so we can cover hall costs.<br />
Please make sure if using a car battery for charging it<br />
MUST be in a plastic container to use at the venue.<br />
Please confirm if you wish to enter!!!<br />
ALL planes & helicopters are welcome<br />
To get your Space booked now<br />
call Alan on 07899 032 944<br />
64<br />
E.F.-U.K.
E.F.-U.K. 65
66<br />
E.F.-U.K.
FOR SALE / WANTED<br />
Member's Sales & Wants<br />
For Sale by Trevor Wain a Puffin Models "Elegant", 2.6m glider / electric glider.<br />
Completed and flown twice before other interests took over. Excellent condition,<br />
no servo's or motor cost £170, offers around £130 to trevorwain@tiscali.co.<strong>uk</strong><br />
or telephone him on 01332 792508.<br />
For Sale the following items from Dave Chinery. Contact him on telephone 0208<br />
573-4687 or at DavidDChinery@aol.com.<br />
• Kontronik Drive 500 (Fun 500 motor & controller combo for around<br />
14 cells and a 12" x 8" propeller). Has been flown, but is as new and in<br />
boxes - £160 o.v.n.o.<br />
• Aveox 1409-2Y motor with a Robbe Pla<strong>net</strong>a Pro gearbox and an<br />
Aveox H260, 6-32 cell, 60A sensored controller. Well flown but in Very<br />
Good Condition - £160 o.v.n.o.<br />
• Sanwa RD6000 computer TX/RX combo and charger. Not PCM but<br />
three model memories and usual mode/mixing functions. 6-channel Mode<br />
2 NiCd'd TX. Dual-conversion RX. Nearly new in box with all literature<br />
- used only twice - £100 o.n.o.<br />
• Robbe moulded foam "combat" Spitfire (painted version) complete<br />
with motor, controller, Hitec RX and servos. Flown and crashed but<br />
repaired and complete ready to fly - £100 o.n.o<br />
For Sale by Jan Bassett (jan.bassett@ef-<strong>uk</strong>.<strong>net</strong>), models from the estate of Sqn<br />
Ldr Ken Woods MBE, being sold on behalf of the family:<br />
• Goldberg Electra powered sailplane (78” span single-piece 663 sq.<br />
in. wing). Fitted with 1x Hitec HS-80 and 1x Futaba S143 servos. The<br />
motor tube is designed for a Keller 22/12 motor, but would fit a Speed 600<br />
motor & compact gearbox with little or no modification. Covered in red,<br />
white and yellow SolarFilm. Intended for 7 Sub-C cells, but would take 8<br />
x Sub-C or 10 x 4/5 Sub-C (not supplied). Only £20.<br />
• Goldberg Electra powered sailplane as above but with a Keller 22/<br />
12 motor, Graupner 10” x 6” folding propeller, Fleet FPS-24A speed<br />
control, Micron Mini Rx and 2 x Fleet FPS-18 mini servos. Covered<br />
overall in Fibafilm - fuselage, elevator & rudder in white - wings, tailplane<br />
& fin in red. Intended for 7 Sub-C cells, but would take 8 x Sub-C or 10 x<br />
4/5 Sub-C (not supplied). All this for only £35.<br />
E.F.-U.K. 67
For Sale a Kyosho T-33 Shooting Star. Fully modified with improved ducts,<br />
splitter plates and tube, lowered aileron linkage, etc, as per article in EFI January<br />
2000. Flies much better than standard with original AP29L motor and fan unit<br />
on 7 cells. Low hours and has not been damaged. Requires two micro servos and<br />
small RX. Complete with instruction sheet, surplus decals and (static) tip tanks.<br />
These modifications give at least 8 cell performance without the extra weight and<br />
excessive brush wear. Reason for selling is that I need room for new projects.<br />
Price £110 o.n.o. Contact Gareth Hodges at gareth.hodges@btopenworld.com<br />
or telephone 07866 661269, please leave a message if there is no answer.<br />
For Sale by Jan Bassett, 2 Astro-Power Leisure (Australia) '4076' Neodymium<br />
motors. These are a specialised high wind 540 buggy motor fitted with an integral<br />
4:1 gearbox and mounting plate. They are designed for use on 12 - 14 cells, up to<br />
25A and power levels up to 400W. These motors have been little used and are<br />
being sold to make room for other projects. Price £35 each or £60 the pair. More<br />
information and dimensions can be seen at www.alphalink.com.au/~mkbuck/<br />
or contact Jan at jan.bassett@ef-<strong>uk</strong>.<strong>net</strong> or on 01935 472 743.<br />
Wanted by the Editor (contact details on page 4) any of the following:<br />
• General or Technical Articles.<br />
• Product Reviews.<br />
• New products.<br />
• <strong>Electric</strong> <strong>Flight</strong> Event write-ups.<br />
• Hints and Tips.<br />
• Photographs of your models (with dimensions, equipment installed and<br />
flight performance please).<br />
• New items of interest for inclusion in this magazine.<br />
• Photograph prints (6” x 4” or larger please) supplied will be returned if<br />
you supply a return address, unless you specify otherwise.<br />
• Digital photographs should be at least 1000 pixels wide (preferably as<br />
large as possible), in colour and uncompressed (wherever possible) or<br />
low compression . They can be emailed or posted on a CD.<br />
Requests for inclusion in the For Sale & Wanted pages can be made by email, post<br />
or by telephone, to the Editor using the contact details on page 4. Entries can also<br />
be submitted on-line from the For Sale & Wanted page on the BEFA website at<br />
www.befa.org.<strong>uk</strong><br />
If you wish to have pictures included with your for sale or wanted entry, post<br />
photographs, or email graphic files, to the Editor. Graphic files should be in colour<br />
and uncompressed were possible.<br />
Adverts will be included in both E.F.-U.K. and on the BEFA Website unless<br />
instructed otherwise.<br />
68<br />
E.F.-U.K.
New to <strong>ELECTRIC</strong> <strong>FLIGHT</strong><br />
START HERE . . . . .<br />
You may be taking up <strong>Electric</strong> <strong>Flight</strong> for the first time, you may be converting<br />
from another discipline. Whatever your situation, help and advice is available.<br />
BEFA has prepared an information sheet which details further sources of<br />
information which you may find useful when just joining the hobby. To receive a<br />
copy, please send a Stamped Addressed Envelope (S.A.E.) to Robert Mahoney,<br />
address on page 4.<br />
BEGINNER'S GUIDE<br />
A Beginner’s Guide to <strong>Electric</strong> <strong>Flight</strong> is available, which explains many of the<br />
'Mysteries' of <strong>Electric</strong>s’ and will, hopefully, set you off on the right foot. Please<br />
send £3.00, per copy required, to The Editor of EF-UK at the address on page 4.<br />
Please add £1.00 extra for overseas postage and remit in Sterling, cheques payable<br />
to BEFA.<br />
TECHNICAL HELP SERVICE<br />
Technical help is now available again for the use of all members. We regret that<br />
no telephone service is available, but all questions in writing (or email) will be<br />
answered by our new Technical Liaison Officer (TLO). Please refer your queries<br />
to our TLO, to the postal or email address on page 4. Please ensure that you<br />
include an S.A.E. for a reply.<br />
CONNECTIONS SERVICE<br />
Requests are frequently received from members who wish to be put in contact<br />
with other members living in the same area. The easiest method of doing this is<br />
to place a free 'wanted' advert in the classified section of this magazine.<br />
Alternatively, a request may be made IN WRITING to the Membership Secretary<br />
who is allowed to divulge such information to members ONLY. Please supply as<br />
much information about your location as possible and please remember to include<br />
an S.A.E. for your reply.<br />
B.E.F.A. MEMBERSHIP<br />
Membership of the <strong>Association</strong> is open to all members of the BMFA. Those who<br />
are not members of our national controlling body may only subscribe to EF-UK<br />
with no other benefits of membership. Overseas members are very welcome and<br />
will be classed as full members if they belong to their own national controlling<br />
body.<br />
CONTACT<br />
For full details, please send an S.A.E. to the Membership Secretary (address on<br />
page 4) requesting a membership application form. Those with Inter<strong>net</strong> access<br />
may visit the B.E.F.A. website at www.befa.org.<strong>uk</strong> where you will find all the<br />
membership application form & information you should require.<br />
E.F.-U.K. 69
70<br />
B.E.F.A. Sales<br />
BEFA Round, Coloured Rub-down Decals - 50p each<br />
EF-UK Back Issues - No's 38, 40, 41, 44, 52, 53, 55 to 63 (inclusive) at £1.00<br />
each for BEFA members, or £2.00 each to non-members. Issues 64 to 73 are also<br />
available to BEFA members at £3.00 each, or £5.00 each to non-members. These<br />
prices include UK P&P, overseas rates on application.<br />
Please Note these are the ONLY back issues now available and stocks are very<br />
limited of several issues.<br />
EF-UK Index. A comprehensive index of EF-UK from issue 28 to 59 is available<br />
by sending a £1 coin to cover copying and postage cost.<br />
Binders:- are available to hold eight issues of <strong>Electric</strong> <strong>Flight</strong> U.K. Produced in<br />
dark blue with gold lettering on the spine, these cost £4.50 each including U.K.<br />
postage. Please add £1 for European postage and £2 for Worldwide postage.<br />
Sweat Shirts & Tee-Shirts: Stock of these is now almost all gone - please<br />
contact Robert Mahoney regarding remaining stock, sizes and prices.<br />
Please send all orders to Robert Mahoney at the address on page 4.<br />
PLEASE REMIT IN STERLING ONLY,<br />
WITH ALL CHEQUES MADE PAYABLE TO B.E.F.A.<br />
Advertisers Index<br />
Andrew Gibbs .............................................................. 42<br />
Aurorra ........................................................................ 27<br />
BEFA Sales .................................................................. 70<br />
E-Zone ...............................................Inside Front Cover<br />
Fanfare ............................................... Inside Back Cover<br />
For Sale / Wanted ........................................................ 67<br />
ImporTekniK ............................................................... 56<br />
Mail Order Model Supply............................................ 32<br />
New-2-U ........................................................................ 9<br />
Spot-On Models ........................................................... 58<br />
Traplet ............................................. Outside Back Cover<br />
Wings & Wheels .......................................................... 63<br />
EF-UK advertising rates are £25 per inside or outside cover, £20 per full page,<br />
£10 per half page, all per issue. Contact the EF-UK Editor for more details (see page 4).<br />
E.F.-U.K.
– MAIL ORDER –<br />
SPORTS <strong>ELECTRIC</strong> <strong>FLIGHT</strong><br />
FANS AND GEARBOXES<br />
www.fanfare.f9.co.<strong>uk</strong><br />
FANS<br />
Morley ‘Jet Elec’ Fan .............................. £15.00<br />
WeMoTec Micro-Fan (280/300/330) ..... £14.00<br />
WeMoTec Mini-Fan (400/480) ............... £28.00<br />
WeMoTec Midi-Fan (540/ 600/930) ....... £38.00<br />
MOTORS<br />
WEP Turbo 10 ........................................ £55.00<br />
Fanfare Silver 16T & 20T ...................... £34.00<br />
Fanfare Powermax 40T ........................ £38.00<br />
Speed 600 8.4v BB SP .......................... £17.00<br />
Speed 600 8.4v Race ............................ £22.00<br />
Speed 650 9.6v BB Race ...................... £33.00<br />
Speed 700 Neodym ............................... £38.00<br />
RE 380 / Rocket 400 ................................ £5.00<br />
Speed 480 BB ........................................ £21.00<br />
Pro 400 .................................................... £5.00<br />
Pro 480 HS ............................................... £6.00<br />
Pro 480 HS BB ......................................... £8.00<br />
MAXCIM BRUSHLESS<br />
Max Neo 13Y 1430 rpm/v ................... £160.00<br />
Max Neo 13D 2470 rpm/v .................... £160.00<br />
Maxu 35D, 21 Cell Controller ............... £140.00<br />
Maxu 35C, 25 Cell Controller ............... £180.00<br />
Superbox 1.6 to 4.28:1 ......................... £50.00<br />
Monsterbox 4 to 6.8:1 .......................... £60.00<br />
Motor Mount ........................................... £12.00<br />
CHARGERS<br />
Speed 1 Pulse / Pk<br />
Det 4-8 cells ........................................... £27.00<br />
Speed Ex Digital<br />
as above with discharge ...................... £55.00<br />
Simprop 25 cell .................................... £100.00<br />
Wheels, Wire, Servos, Fuses, Caps,<br />
Powerpole, 4mm & 2mm gold conns.<br />
GEARBOXES<br />
Master Airscrew - 2.5, 3, 3.5:1 ............................. £18.00<br />
MP Jet Pla<strong>net</strong>ary - 3.33 & 3.8:1 - 400 / Pro 480 ...... £28.00<br />
MP Jet Pla<strong>net</strong>ary - 3.33 & 3.8:1 - Speed 480 ........ £28.00<br />
MP Jet Pla<strong>net</strong>ary - 3.33 & 3.8:1 - 540 / 600 ............ £28.00<br />
MP Jet Plastic BB - 4 & 5:1 - 280 / 300 ...................... £8.00<br />
MP Jet Plastic BB - 3, 3.5 & 4:1 - 400 / Pro 480 ......... £8.00<br />
MP Jet Plastic BB - 2.33, 3.5 & 4:1 - Speed 480 ..... £10.00<br />
MP Jet Plastic BB - 1.75, 2.33 & 2.8:1 - 540 / 600 .. £15.00<br />
Mini Olympus ............................................ £8.00<br />
Olympus ................................................. £12.00<br />
MOTORS / GEARBOXES<br />
Speed 400 FG3 ..................................... £17.00<br />
SpeedGear 400 4:1 Inline ...................... £38.00<br />
SpeedGear 480 3.45:1 .......................... £55.00<br />
SpeedGear 600 2.8:1 ............................ £52.00<br />
SpeedGear 700 2.7:1 9.6v .................... £70.00<br />
SpeedGear 700 Neo .............................. £92.00<br />
Mini-Olympus & RE380 .......................... £12.00<br />
Olympus & 540 ...................................... £19.00<br />
Jamara 600 2.9:1 ................................... £24.00<br />
Jamara 650 2.9:1 ................................... £26.00<br />
PROPS<br />
M.A. Folding 12x8 ................ £14.00<br />
15x12 .............. £15.25<br />
M.A. Wood <strong>Electric</strong> 10x6/10x8 ......... £4.00<br />
11x7/11x9 ......... £4.25<br />
12x8/12x10 ....... £4.50<br />
13x8/13x10 ....... £5.00<br />
Carbon Folders 7x4 .................... £6.00<br />
(Perkins) 8x4 .................... £6.00<br />
11x8 .................. £9.00<br />
Slimprops 8x4, 8x6, 9x6 .... £3.50<br />
APC <strong>Electric</strong> 5½” - 12” dia . £3 to £4<br />
(full range available) 13 ” - 20” dia.£5 to £15<br />
Selection of Graupner & Aeronaut<br />
folding & fixed props.<br />
FANFARE • 18 HILLSIDE ROAD • TANKERTON • WHITSTABLE • KENT • CT5 3EX<br />
‘Sports <strong>Electric</strong>’ Helpline - Phone / Fax: (01227) 771331 - E-mail: john.swain1@virgin.<strong>net</strong><br />
Now online at - www.fanfare.f9.co.<strong>uk</strong>