Prowler VT950 Study Plans A4 - Schionning Designs

STUDY PLANS

2CONTENTSPAGE 4PAGES 6/7PAGES 8/9PAGES 10-12PAGE 13PAGE 14PAGES 15/16PAGE 17PAGE 18DESIGN OVERVIEW & SPECSPHOTO’SLAYOUT & PROFILECONSTRUCTION OVERVIEWMATERIAL LISTNOTES FROM THE DESIGNERBASIC ELEMENTS OF GOOD DESIGNSCONSTRUCTION PLANSHOW TO ORDER

3Hello and thank you for showing interest in our Design.Schionning Marine is a family based Australian business, we are verypassionate about our designs and continually strive to offer the bestoptions to get you out there and make your dream a reality.Choosing the right design can be a real challenge, there are so manyoptions and variations and purposes a boat needs to meet. We will helpyou to determine which design will best suit your lifestyle and purpose,also your budget. We have plenty of options!These Study plans contain a lot of information directed at the “OWNERBUILDER”, the aim being to show you how simple and achievable itreally is and to help you determine whether you will be able to do ityourself. Be assured, hundreds of absolute novices have and are doingit so if you really want to build a boat, go for it, we will help you all theway.If you are NOT an owner builder and would like to buy one of ourdesigns, we work closely with several excellent boat building yards inAustralia and overseas. Using one of these builders to build a customboat for you, rather than buying a molded production boat is veryrewarding, you can get exactly what you want and you’ll be surprisedjust how well priced this can be too. Later re-sale value is high and thequality of a hand build composite boat, built by a recommended builderfar out strips any production process in terms of strength, quality andlightness (therefore performance).We look forward to hearing from you once you’ve studied the followingpages. We have not included kit pricing due to the many variations andoptions so please email or call us and we’ll furnish these on request.Good luck with your research and project.Jeff, Lorraine, Brett and Ben Schionning& Rob Shenn.

4DESIGN OVERVIEWFor such a small waterline the ‘VT950’ offers space and living areas notseen in a multihull this length.Open living areas and a sense of lightflow through the interior design ofthis boat expanding on the alreadygenerous space. A galley and saloonthat offers a 360 degree view, andhulls with massive width mean openplan living, instead of the usual’stuffiness’ that comes with a boat.The secret behind this is mainly herunusual underwater hull shape. Wehave managed to achieve a blend ofcharacteristics that has not, untilnow, been possible to achieve in apower cat.The VT design carries forward all thegood points of the Prowler lineage...· High bridge deck clearance atspeed· Exceptional seaworthiness· Soft ride in rough conditions· Easy beaching· Fully protected motors.But there is one big difference; thisamazing boat has the ability to plane.The new underwater shape as well asopening the space in the hulls allowsthe boat to have enough surface areto propel it on to the plane, offeringhigh speeds and great fuel efficiency.In addition, she offers full privacywith easy access to hulls from insidethe saloon with soft steps and noLOABOADraftHeadroom/ BridgedeckHeadroom/ HullsCruising RangeBridgedeck ClearanceDisplacementPayloadMotor OptionMotor Speed—CruiseMotoring Speed—TopFuel CapacityWater Capacity9.50 Metres5.50 Metres0.600 Metres2.00 Metres2.00 Metres300 nm+0.665 Metres4,000 Kilograms1500 Kilograms2 x 140HP Outboards17 Knots28 Knots600 Litres400 Litreshead bumping. The hulls have fullheadroom adding to the idea of space,two queen size berths in forward cabinswith exceptional headroom and loads oflocker space.Two single bunks in the port hull takesthe onboard accommodation to 6.The cockpit is big and wide with greatoutdoor entertaining abilities. This flowsinto the saloon with a large single door,bring the out doors in. The largecomfortable saloon and galley withlofted ceiling gives an awesome feelingof space and headroom and alsoremoves heat through the ceilinghatches. Windows right around thesaloon sides give a very airy feel andaccentuate the 360 degree aspect ofthis boat.. A small breakfast bar andstools extend the galley area aft intothe cockpit With two steering stations

5you have the choice to enjoy thesunshine on the fly bridge or escapethe weather in the saloon. The middlewindow forward at the saloonsteering station is a flat panel windowgiving great clear vision forward.Outside we have good, safe,uncluttered side decks. The forwarddeck is large and flat with notrampolines. With plenty of lockerstorage for the toys up front.The fly bridge is a great area with thetarga bar raised to offer full sittingheadroom under a fold out bimini.Between the targa legs we haveadded a full width seat for morecomfort. Hatches into the loftedceiling area allow drinks etc. to behanded up from the galley area.MOTORS:The new hull form has the addedability to use more power to achievemore speed. While tank testingsuggests we could use similar motorsto the Prowler 9000 the new hull caneasily run faster than the Prowler9000 which has a max speed of 21knots.The VT allows for a very wide rangeof choice in fittings and options. Youhave the option to add luxury items,then simply use the motor size togive the required performance. Theresult will affect the fuel economy ofthe boat but this is not always apriority. 90hp Outboard motors areideal for the lighter boats going up to150hp for customers looking forspeeds above 30 knots or who chooseto load on extra weight. Dieselmotors are also an option as thereis plenty of room under the cockpitfloor to house them.The motors sit off centre leaving alarge boarding area for easy accessfrom the marina or a dinghy. Thisarea will also accept the swimmingladder. The dinghy is stored on davitsaft of the cockpit seat. Construction isPre-cut DuFlex (balsa cored) flatpanels and West system epoxyproducts. All DuFlex panels beingpre-cut for ease of constructionmakes this design exceptionally quickto build.The Prowler 950VT is designed tosuit a very wide range of applications.Due to her payload and ability tohandle weight, she can accommodatea luxurious fit-out or be built to aspartan weekender. She makes aperfect sports fishing boat or roughwork-horse for commercial fishing infresh and live products.

INSIDE...6

7OUTSIDE...Courtesy Paul Tyler

LAYOUT PLAN8

PROFILE9

10Kit Construction Sequence1.This design is initially assembled upside down. With this in mind, a level strong back is assembled that encompasses theflat deck area. Note the turn up in the bow sections. The strong back is built to reflect this.2.Once the flat decks are in position, the bulkheads are stood on station along the flat deck. Note the aft bulkheadsuspended beyond the flat deck area. Bulkheads must be appropriately braced so they are square and plumb.3.Once the bulkheads are in place and secured, forward webs and stiffeners are glued into position. The sole of theanchor locker is glued in place before the webs that are positioned between bulkheads 2 & 3. Note the web inbetween bulkhead 3 and 4, this is the area between the forward doubles and the anchor locker sole in purple.

114.Bridgedeck panel in place. To bend the panel over the forward ‘D’ sections and webs, kerf panel. The bulkheads are bracedand secured into position with a ‘spine’ and brace making sure they remain plumb, as before.5.The V section of the hull is glued in place. The next panels are then attached, forming the bottom hull chine which createsthe spray rails forward and the flat planing sections aft.6a.Explanation continued overleaf...

126b.Chamfer and hull side panel is glued into position. Whilst upside down, fare the finished hull sections before turning (6a).Turn the whole platform using a small crane (6b).7.Once upright and positioned correctly in cradles, all the intermediate V Webs are glued in. Note: Chamfer panel andoutside V hull panel has been removed to illustrate.8.The cockpit floor, seating, coaming and side deck steps are now installed.

139.All internal furniture is installed (using honeycomb Featherlite panels) into the hulls. All parts that join to the outside hullpanels are left off for ease of access, ventilation and working light.10.11.The saloon seating and galley area on the bridgedeck are fitted.Cabin sides are now fitted, ready for the installation of the windows.

1412.The pre‐cut fly‐bridge is built separately, ready for installation once complete. Note that radial kerfing is required to createsome of the complex shapes using the Duflex panels.13.14.The completed flybridge is fitted into place on the cabin top.The main hull panels are inserted and fitted. The pre‐cut targa bar is constructed separately, and installed.

1515.The windows are inserted, and the transom area, swim step and outboard wells are finished. The structural shell is nowcomplete and ready to be painted!...And you’re on the water!

16CONSTRUCTION1.2.3.4.5.6.

17MATERIAL LISTDurakore Planks - 2400 x 300mm13 13mmDuflex Balsa - 1 x 600gm Biax each side 2400x1200mm116 13mm13mm includes 0 Non Routed14 25mm25mm includes 0 Non Routed26Featherlight Interior Paper H/Comb 1 x 600gm 16 mm2400x1200mmFeatherlight includes 0 non routedWest R105/206 Resin & Hardener 5:1 by volume2 200 litre West System Resin4 20 litre West System Hardener SlowTechniglue HP Toughened System 100:26 by weight1 4kgToughened Epoxy Resin RB 51 1kg Toughened Epoxy Hardener HB 5Powder Modifiers8 20lt Microspheres (411)12 20lt Microfibres (403)2 6.5 kg Microlight (410)Fibreglass Cloth (Colan Products)47 450 g Double Bias ( 47 kg roll) kgFibreglass Cut Strips (Colan Products)48 450 g D/bias 105 mm ( 4.00 kg tape) kg48 450 g D/bias 155 mm (6.00 kg tape) kg12 450 g Unidirectional 105mm (4.00 kg tape) kgPlywood - Gaboon 2440 x 1220mm1 25mmKlegecell Foam 80 kg 2175 x 1220mm 2.65m2 / sheet5.3 40mm sheet - per m2 pricing1 Precutting & Scarfing Prowler VT9500 Balsa1 Precutting & Scarfing Prowler VT 9500 Featherlight

18NOTES FROM THEDESIGNER….The success of our designs I feel, stems fromthe practical commonsense approach of a boatbuilder, coupled with many years of live aboardexperience and 50 - 60,000 sea miles in someof the worst conditions in the world. Thisexperience makes one aware of the power ofthe sea and the need for a boat to be able tosurvive these conditions, protect her crewphysically and psychologically as well as beinga fast comfortable vehicle for all the goodtimes. I am sure you will find our designsreflect our sailing and live-aboard experienceand will give you the offshore confidence tocruise safely anywhere in the world. Multihullsare ‘beautiful, safe, cruising boats’. We hopeyou find them as exciting as we do.CHOOSING A DESIGN...Choosing a design can be difficult so we hopethat this introduction helps clear the way alittle. We’ve taken particular care with thebalance of construction methods in ourdesigns, making them light and strong yet easyto build in small sections, most of which aremanageable by a group of friends when theyneed turning over and moving. The blend ofstrip planking and light flat panels kept insingle plane form, makes building easy andquick and produces a finished catamaran ofclassic good looks which will not date quickly,giving you very good investment security.One of the first steps in changing this dreaminto reality is figuring out whether you canafford the boat (or more likely, how muchmoney you ‘don’t’ have!). Two realities hereare, firstly, two similar sized boats with similardisplacement, built of similar materials will costthe same to build overall. Designers’ estimatesof materials are often inaccurate and sometimesminimized to lead one to believe theirboat will be cheaper.This is definitely not the case, similar boat,similar price! Your choice should therefore betowards the boat that suits you best and offersyou good backup and is a good investment.Secondly, we know a lot of people who could notafford their boat at the onset so don’t bediscouraged. Once you start building it issurprising how you focus your interest, spare timeand money into your new project. With our newowner-builders we suggest they start with thesmaller items which can be built in the garage,carport, (lounge?) etc. These initial items use verylittle material and money but use a lot of time, soat the early stages you can get a lot done whileyou wait for your old boat or car or house etc. tosell. These items are; flybridge, targa bar, cabinroof, rudders, dinghy etc. The experience andconfidence gained building these bits speeds upthe second stage of larger items and gets thewhole project finished much sooner.WHAT MAKES A GOOD MULTIHULL?Cat design is not just a matter of two hulls floatinga cabin above the water. Only in fairly recentyears have the basic elements of design and anunderstanding of their effect on the use andperformance of the finished boat been understood.The basic principles of good design shouldall be present in the boat you’re considering buildingor buying. These will blend together to producean excellent Multihull.

19THE BASICS ELEMENTS OF A GOODDESIGN:GOOD ENGINEERING is obviouslyessential.FLAT DECKS. The flatter deck lines have anumber of advantages. Secure footingwhile on deck at any time in rough conditions,life lines are at a sensible protectiveheight instead of set down a level. A flatdeck is great for socializing, sunbathing oras a kids playground.BUOYANCY. Buoyancy distribution is theplacement of buoyancy in the hulls. Ourdesigns have between 50 and“A power vessel that uses lessfuel and is capable of runningefficiently at higher speedssaves you money and time.”60 separate buoyancy tanks built intoevery shell so they are almost unsinkable.Most old designs hobbyhorse a lot makingthem uncomfortable and inefficient.Modern designs have the buoyancypushed towards the hull ends dampingdown the hobby-horsing tendencies andgiving a lot more safety downwind wherethe buoyant hulls stop nose-diving.Coupled with a lot of reserve buoyancyhigh up and forward in the hulls, thisadds an enormous amount of safety andgives you confidence off the wind.higher up is an ideal combination.BRIDGEDECK CLEARANCE. HighBridgedeck Clearance is essential. A shortcabin length with long hull overhangs is agood safety feature. Good clearance on aplaning hull cat would be 600mm –800mm, or 1m—1.2m for a power catrunning displacement hulls. Chamfer panelsadd high reserve buoyancy and needless clearance than a similar cat withoutthem.FUEL ECONOMY AND CRUISING RANGE.When discussing sailing designs we oftentalk about speed and performance as beinga real safety feature, and our powerdesigns are no different. Good power designsshould be capable of speed in allkinds of sea conditions safely, as severeweather can be outrun or avoided, andthere is no need to spend time waiting fora gap in the weather. Fuel economy isimportant for saving you money, andtime. Having a vessel that uses less fueland is capable of running efficiently athigher speeds means less time at sea,more time fishing or relaxing on thebeach and a smaller risk of bad weatherwhile on that ocean passage or weekendtrip. We feel a healthy fuel reserve isextremely important, and being able tocarry enough fuel to get you safely thereand back, and keep you going shouldsomething go wrong cannot be emphasizedenough.A soft ‘V’d entry, quickly picking upreserve buoyancy with lots of reserve

20LOW DRAG. This is a good characteristic.Slim hulls reduce drag and are efficient.A good cruising cat would have a Waterlinebeam to length ratio of 11.5 to 12.5:1. Aperformance cruising cat 12.5 to 14:1 and aracing cat 14 to 20:1 It is important to note thatALL these elements must be present in adesign to make any of them valid. For example,a design can be really good looking, have highbridge-deck clearance, a powerful rig and sailplan and be built reasonably light and show afair displacement, but then have an 8:1 Beamto Length ratio. She’ll be a good looking,powerful boat but it will be impossible to goforward, except slowly!Good luck with your research and project, don’thesitate to contact us should you need furtherinformation or a chat about our designs. JeffThere is no reason why a good modern designdoes not have all of these features. If you findsome of these lacking it is usually for the wrongreasons. A lot of cats have very little bridgedeckclearance because the designer isconcentrating on a low profile cat which looksgood or being dictated by interioraccommodation and ignoring the fact that theboat will pound badly at sea. This is not onlynoisy and uncomfortable but can well be thecause of structural problems.Our designs have been developed around thesepractical elements of good design then weaccommodate personal comforts and lifestylechoices.NEED HELP SOURCING MATERIALS?We supply hundreds of builders and don’t carry stock, the goodsgo directly from the manufacturer or distributor to you.SAVE MONEY AND HANDLING COSTSCall Rob at Schionning Marine today (02) 4982 4858

21CONSTRUCTION PLANSWHAT YOU GET WITH PLAN PURCHASE:The Prowler VT950 has a comprehensive set of CADdrawn plans showing every inch of construction detail.Brett Schionning has produced a CD-ROM thatshows the assembly and building techniques as wellas loads of tips on the easiest way to do thingswith plenty of photographs for reference. It includesbasic information such as what tools you requireand product information and use. Plans are suitablefor Amateur construction.UNLIMITED BACK UP SERVICE:Our back-up service is unlimited, our professionalboat builder (Brett Schionning) will be here to guideyou through any problems throughout your entireproject. Email and phone support is available duringbusiness hours Monday to Friday.PLANS INCLUDE: Full size, colour-coded plots for bulkheads A3 Booklet of CAD Drawings CD-Rom building manual Backup support throughout your projectCOST OF PLANS:Prowler VT950 plans cost AUD $9.900.00.Price valid until 31st Oct 2010.Includes GST in AustraliaIncludes shipping to any destination.AN EXAMPLE SHEET FROM PROWLER VT950 CONSTRUCTION PLANS

22HOW TO ORDERHOW TO ORDER PLANS:We require a signed and faxed or mailedPLAN ORDER FORM with every plan purchase.The Plan Purchase Order form explains ourterms and conditions and plans will not bemailed until a signed order form is received.(See form included in study plans)PAYMENT:WE ACCEPT: Bank cheques or direct depositinto our bank account. Our account details areon the order form. Credit cards are not acceptedfor plan purchases.SHIPPING:Plans are sent by express mail within Australiaand by courier to other countries at no extracharge to you.HOW TO ORDER PLANS: Complete the attached PLAN PURCHASEORDER form and mail or fax it back to uson (02) 4982 4722. Deposit payment to Schionning Design’sAccount, (details on order form). When payment and your order arereceived your construction plans will beassembled, checked and mailed within 7—10 days to your nominated address.KIT ORDERS:Construction plans must be ordered before (orat the same time) as your kit.us to insure the kit during transit (cost is0.75% of the invoice value) and you’llneed to provide us the delivery address.We will notify you of the lead time (date)once the order is logged into the manufacturingschedule and we will contact youagain about two weeks before your kit isready for dispatch.You will then need to deposit the balanceof the kit value, including freight and insuranceif you nominated to use our services,into our account. Once this is received,the kit will be shipped to you.ANY PROBLEMS, CONTACT US:+61 (02) 4982 4858Building a boat is definitely a challengebut with good plans, our helpful friendlysupport and the modern materials available,it's never been easier. The investmentof time and money is very worthwhile,offering a rich life experience,fun reward when you launch her andfinancially you can certainly stand togain substantially. We look forward tohearing from you again and wish youthe very best with your project.Contact Schionning Marine for a KIT quotewhen you are ready to order your kit.We will invoice you for the kit, 50% of thisinvoice value is required upon order,deposit to the account as shown on theinvoice.You will also be asked to complete a secondorder form for the kit and on this formyou will nominate whether you would likeMilski family on launch day.