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F-14 Tomcat Park Jet - Poids-plume-rc

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Page<br />

1<br />

F-<strong>14</strong> <strong>Tomcat</strong> <strong>Park</strong> <strong>Jet</strong><br />

Made In Washington State, USA!<br />

Kit# 3DF0F<strong>14</strong><br />

A High Performance Electric <strong>Jet</strong><br />

About This Construction Manual<br />

This booklet divides the construction into sub-assemblies; wing, fuselage, etc. Please read each section carefully before starting<br />

on that particular sub-assembly. There is a complete description of all parts under “Kit Contents” Please check to make sure your kit<br />

is complete. We are human, and occasionally miss something! If you have trouble identifying a part, or are missing something, please<br />

contact us and we can help.<br />

During the construction process the steps will outline what part to use. We have used actual pictures instead of unclear or often<br />

inaccurate illustrations to assist in the building process. This manual is intended for English users, and all measurements are made in<br />

standard units (inch, foot, etc.)<br />

Customer Service:<br />

Should you experience a problem building or flying this kit, we recommend you see your hobby shop first. If you are unable to solve<br />

the problem, feel free to contact: Further updates can be found on our website<br />

support@3DFoamy.com or online at www.3DFoamy.com<br />

This product is sold with exclusion of all warrantee, expressed or implied, statutory or otherwise.<br />

Pilot assumes all risk in building and operating this model. Do not operate if you are not an experienced modeler. Refer to<br />

and abide by AMA rules at www.modelaviation.com for regulations on Radio Control Models.<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

2<br />

Kit Contents<br />

Part No. QTY. Dimensions Description<br />

007201a 1 Laser Cut Foam Foam Kit Parts A 6mm<br />

007201b 1 Laser Cut Foam Foam Kit Parts B 6mm<br />

007201c 1 Laser Cut Foam Foam Kit Parts C 6mm<br />

007201d 1 Laser Cut Foam Foam Kit Parts D 3mm<br />

007207 2 ¼ Nylon Bolts Wing swing bolts<br />

007206 1 (1)2-56 rod and (4)ends Swing wing pushrods<br />

007205 2 EZ links and pushrods Stabilator control parts<br />

007204 1 Laser cut 1/8” ply Plywood parts<br />

007202 2 .21” dia carbon tube Wing Spar<br />

007203 2 .21” carbon tube Stabilator spar/pivot<br />

007209 1 Laser Cut Plastic Control Horns/Doublers<br />

007210 1 Intro Sheet Getting Started Paper<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

3<br />

□ 5 Ch radio system with 3-4 micro<br />

servos (HS-55 or similar) and micro<br />

receiver (Hitec Electron 6)<br />

□ Odorless Medium CA and<br />

accelerator. (Accelerator a must)<br />

Additional items you will need<br />

□ Motor (Himax 2015-4100 gearbox<br />

recommended)<br />

□ Connectors – Dean’s Ultra<br />

connectors are recommend for this<br />

model.<br />

□ Props (APC 9x6 recommended)<br />

□ Speed Control (Castle Creations<br />

Phoenix 25 recommended)<br />

□ 5 or 15 minute Epoxy □ Li-Poly Battery pack (1200-1500<br />

mah 3s1p recommended)**<br />

□ 3M Satin tape<br />

□ Extra high quality flexible hook up<br />

wire (16 gauge minimum)<br />

□ Li-Po Charger (Must be approved<br />

for Li-Po Cells!)<br />

□ Foam-safe contact glue (sold at<br />

most craft stores)<br />

Building supplies that make it easy<br />

□ Scissors □ Sand paper (150, 220, and 320 grit) □ Steel straight edge<br />

□ Razor saw □ Hobby Knife and extra blades □ Small building square<br />

□ Rubbing Alcohol □ Pencil and Pen □ Wire cutters<br />

□ Soldering iron □ Assorted screwdrivers □ Paper towels<br />

Definitions<br />

• LE- Leading Edge • CA- “Super Glue” • Brushless- New<br />

motors, no brushes,<br />

computer controlled.<br />

• TE- Trailing Edge • Brushed- Normal • Li-Poly-New Battery<br />

motor type, brushes, packs. Lithium<br />

can, magnets.<br />

Polymer (Cell phone<br />

battery)<br />

• 3S1P- 3 cells, 1 Pack<br />

• 3S2P- 3 cells, 2 packs<br />

• ESC—Electronic<br />

Speed Control<br />

• “C” Rating- the maximum charge or discharge<br />

rate of the cell. A 1000 mah pack rated at “10C”<br />

could provide a 10 amp discharge. All packs<br />

should be charged at “1C”(1000mah pack should<br />

charge at 1000 mah max. That means a 1 hour<br />

charge time.<br />

© 2005 3D Foamy All Rights Reserved


General Construction Notes<br />

1) Start by thoroughly reading this manual, and also look carefully at the plans. Many items<br />

are addressed more clearly on the plans.<br />

2) Normal CA will melt the foam, but odorless CA can be used. Accelerator is a must! It will<br />

take hours to dry on its own…<br />

3) PAINTING: Painting is not necessary. However, test the paint on a small scrap first. If<br />

masking for painting, use blue low adhesive tape or else when the tape is removed, the<br />

film will inadvertently be removed as well. When removing the tape, pull the tape<br />

towards any edge of the film so that the film is not pulled loose. You will likely need to<br />

put striping tape between the colors as they can bleed under the tape. An alternative to<br />

painting is colored packing tape. It is easy to use, self adhesive, and low cost.<br />

Page<br />

4<br />

Electronics Notes<br />

There are many choices to make when deciding on your power system and it can get confusing. For good performance, it’s important<br />

that the motor/gearing/prop used for this model generate at least 18-20 oz static thrust and a 45-50 mph pitch speed. A program like<br />

MotoCalc (www.motocalc.com) is invaluable for analyzing potential power systems and is highly recommended.<br />

The recommended power setups for this model are summarized below. Both of these setups utilize efficient high-power brushless<br />

motors, and will provide excellent jet-like performance. Note that brushed motors (such as the GWS EPS-350) will not provide good<br />

performance on this model and are not recommended.<br />

Standard Brushless Setup<br />

Motor: Himax 2015-4100 with "B gearing (4.4:1) or Himax 2015-5300 with “C” gearing (5.3:1)<br />

Battery: High performance 1200-1500 mAh 11.1V lithium-polymer pack capable of supplying at least 12 amps continuous. Note that<br />

7.4V lithium-polymer battery packs will not provide adequate performance on this model and should not be used.<br />

Speed Control: Castle Creations Phoenix 25 brushless controller<br />

Prop: APC 9x6 or 9x7.5 slow flyer<br />

This setup will produce 21 oz static thrust with 50 mph top speed and will provide exhilarating performance with nearly 1:1 thrust-toweight<br />

ratio (if you build light).<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

5<br />

Brushless Outrunner Setup<br />

Motor: Axi 2212/26, Hacker A20-20L, 22L<br />

Battery: High performance 1200-1500 mAh 11.1V lithium-polymer pack capable of supplying at least 12 amps continuous. Note that<br />

7.4V lithium-polymer battery packs will not provide adequate performance on this model and should not be used.<br />

Speed Control: Castle Creations Phoenix 25 brushless controller<br />

Prop: APC 9x6 or 9x7.5 slow flyer<br />

This setup will produce 19 oz static thrust with 50 mph top speed. It doesn’t have quite as much power as the recommended Himax<br />

motors above, but the Axi outrunner is extremely smooth and quiet in operation and has none of the gearbox noise of the Himax. This<br />

motor is a pleasure to fly. Note that you’ll need a GWS stick mount adapter to mount the Axi and Hacker to the hardwood motor mount<br />

on this model.<br />

Please note this model was designed to be a lightweight parkflyer and was not designed to handle<br />

extremely powerful motor systems and high flying weights. Thus, avoid the temptation to overpower this<br />

model unless you have the knowledge and experience to modify the design appropriately!<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

6<br />

About your Plane<br />

Your ai<strong>rc</strong>raft was designed by computer (CAD) for accuracy and construction ease. All parts have been precision cut on a CNC laser<br />

cutting system right here in the 3D Foamy shop!<br />

The foam used in your kit is the best quality available. Depron is very light and stiff and is also very forgiving and easy to paint.<br />

However, because we want weight at the minimums, the planes are still somewhat fragile, so a little care can go a long way.<br />

Note that this model is intended for experienced modelers, and is not suitable for beginners. If you’re comfortable flying a fast sport<br />

aerobatic airplane, you can probably handle this model.<br />

I hope that you are going to enjoy building and flying this plane as much as I have! Best of luck, and don’t hesitate to e-mail me with any<br />

questions or comments at help@3DFoamy.com.<br />

P.S. If you think I can improve or clarify something in this manual, please let me know!<br />

Construction<br />

Before Beginning<br />

All parts have been accurately cut on a computer-controlled laser cutting<br />

machine. Remove the ai<strong>rc</strong>raft parts from the foam packing sheets. Cut the<br />

tabs loose with a razor blade for best results.<br />

This model can be built using the following types of adhesives:<br />

• Epoxy<br />

• Odorless cyanoacrylate (CA) with accelerator<br />

• UHU Creativ for Styrofoam (or UHU POR) (pictured at left)<br />

• 3M 77 spray adhesive<br />

• Hot glue gun<br />

• ProBond (or Gorilla Glue)<br />

To minimize weight, try to use as little epoxy as possible on this model,<br />

saving it for only critical joints such as wing spars and motor mounts. For<br />

best results, the majority of construction should use a lightweight and quickdrying<br />

adhesive such as CA, UHU Creativ, and 3M 77.<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

1. Begin assembly with the forward fuselage. Lay the two fuselage sides<br />

down flat on the work bench and glue the foam doublers to the locations<br />

shown on the plans. Be sure to make two mirror image parts—a left side<br />

and a right side.<br />

7<br />

After the glue has dried, glue the three fuselage bulkheads to one of the<br />

fuselage sides at the locations shown, making sure they are perpendicular.<br />

2. Next glue the two fuselage sides together. Set the fuselage sides upright<br />

and flat on the workbench, apply glue to the edge of the bulkheads, and<br />

push the sides together.<br />

After the glue has dried, glue this assembly to the fuselage bottom piece<br />

as shown.<br />

Glue the two forward fuselage top pieces in forward of the canopy (not<br />

shown in this photo).<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

3. Laminate the nose cone pieces together using 3M 77 spray adhesive.<br />

Then glue the assembled nosecone block to the forward fuselage as<br />

shown (5 minute epoxy recommended).<br />

8<br />

Once the glue has dried, carve the nose cone to shape. Start by tracing<br />

the top view on the top of the block and cutting the block to that outline.<br />

Begin with coarse sandpaper (60 grit) to rough out the basic shape, then<br />

move to progressively finer sandpaper (first 150, then 220 grit) to do the<br />

final shaping.<br />

Make the canopy using the same procedure. Note the canopy has two<br />

smaller sill pieces that glue on to each side of the canopy to form the lower<br />

sill.<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

4. Begin assembly of the inlets. Be sure to make two mirror-image inlets!<br />

9<br />

First glue the small plastic stabilizer support discs to each side around the<br />

laser cut ci<strong>rc</strong>les for the stabilators, Then glue all the foam support strips<br />

as shown to both the inboard and outboard inlet sides. Glue the taileron<br />

servo doubler to the inboard inlet side.<br />

Use a heat gun to gently form the required curves in these pieces. Hold<br />

each piece next to the inlet bottom piece to judge the curvature required.<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

5. Tack glue the three temporary inlet bulkheads to one side (these will be<br />

removed later), and then tack glue the two inlet sides together.<br />

10<br />

Next glue the inlet bottom piece on. To make sure the inlets are<br />

assembled perfectly square, hook the sides over a bench as shown and<br />

hold the top of the inlets flat against the bench as the glue dries.<br />

After the glue has dried, sand the corners of the inlets to a well-rounded<br />

shape.<br />

© 2005 3D Foamy All Rights Reserved


6. Glue the inlet diverters to the fuselage sides. Note the bottom of the<br />

diverter butts up against the step in the fuselage bottom piece.<br />

Page<br />

11<br />

7. Laminate the five motor mount pieces together using 3M 77. Note the<br />

tabbed piece goes in the middle. Then sand the assembly to a tapered<br />

shape as shown.<br />

Laminate the motor mount with the 3 pieces from the ply sheet, glue in the<br />

motor mount using 5 minute epoxy.<br />

© 2005 3D Foamy All Rights Reserved


Page 12<br />

8. Sand the forward fuselage to the contours shown. It’s important to do this<br />

now before you glue the inlets to the side of the fuselage, since the inlets<br />

will block access to the aft part of the fuselage. Sand the bottom edges to<br />

a ci<strong>rc</strong>ular shape, and then sand the top edges down to the feathered<br />

shape shown on the diagram at left. Note how the tops of the fuselage<br />

sides blend into the canopy sill.<br />

© 2005 3D Foamy All Rights Reserved


Page 13<br />

9. Next glue the inlets to each side of the fuselage. Note that the tabs on the<br />

fuselage bottom piece slide into corresponding slots in the inlet sides,<br />

which automatically ensures proper alignment. But you’ll need to make<br />

sure the inboard forward top edges of the inlets are flush with the top of<br />

the aft fuselage (the area held together with blue tape in the bottom picture<br />

at left). Note that the motor mount also has tabs and slots to ensure<br />

proper alignment as well. 15 minute epoxy is highly recommended for this<br />

step, both for strength and to give you time to get everything aligned<br />

before the glue sets. Set the fuselage upside down on the workbench<br />

(hooked over an edge with the inlet tops sitting flat against the bench) as<br />

the glue cures to ensure this assembly is perfectly flat on top. This is<br />

important because the wing spar box will span across the top and the<br />

wings will fold up on top as well.<br />

After the glue has cured, remove all of the temporary bulkheads inside the<br />

inlets.<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

10. Next we’ll build the wing sweep mechanism. Begin by removing all the<br />

laser-cut parts. Touch-up sand the pieces where necessary.<br />

<strong>14</strong><br />

11. Glue the doublers to both ends of the spar box top and bottom pieces.<br />

Laminate the two spacer pieces and glue them in place on top of the<br />

doublers on one side. Then glue the balsa shear webs in place on the<br />

same side. Medium viscosity CA is recommended for all of these joints.<br />

Next laminate the two swing arm pieces together with CA. Be sure to<br />

make two mirror-image parts—the piece with the control arm goes on<br />

bottom for each side.<br />

NOTE: Picture shows prototype with servo mount attached, this has been<br />

changed since and it is no longer one piece.<br />

© 2005 3D Foamy All Rights Reserved


Page 15<br />

12. Test fit the top and bottom spar box pieces together. Sand the balsa shear<br />

webs as required until you get a perfect fit. Then glue the top and bottom<br />

pieces together with CA.<br />

Now drill the four holes for the nylon bolt wing pins to size—one in each<br />

end of the spar box and one in each swing arm. Use a drill press if at all<br />

possible to ensure the holes are perfectly perpendicular! I left them a tad<br />

undersized so you can drill to fit perfectly, I left the top holes a bit<br />

undersized and threaded the bolts into them so they stay in place.<br />

Test fit the swing arms and nylon bolts in place, and check to see if they<br />

rotate smoothly. You want them to fit tightly but still rotate smoothly. Sand<br />

the swing arms as required to thin them down until they turn smoothly.<br />

Note that you can also adjust the tension of the swing arms by tightening<br />

the nylon nut and bolt, so it’s OK if the swing arms end up a little loose.<br />

© 2005 3D Foamy All Rights Reserved


Page 16<br />

13. Cut the carbon tube wing spars to length and test fit the swing arms and<br />

spars into the wing, trimming as required. Then glue the swing arms and<br />

spars in place using epoxy (note that the side with the control arm goes<br />

down on the swing arms). Place wax paper and heavy books on top of the<br />

wings as the epoxy cures to ensure everything stays perfectly flat. After<br />

the glue cures, put a strip of 3M Satin tape over the top and bottom of the<br />

spar to help hide the joint and provide a smooth wing surface.<br />

Now sand the wing to shape. Sand the leading edge to a well-rounded<br />

shape and sand the trailing edge down to a tapered shape from the top.<br />

This will result in a thin flat-bottom airfoil. Put a strip of Satin tape over the<br />

leading edge to provide durability and smoothness.<br />

<strong>14</strong>. Glue the 3 1/8” thick spacer blocks in the bottom center of the wing swing<br />

box. However, check the fit of your servo first to see if this thickness puts<br />

the servo arm at the same height as the control arms on the wing swing<br />

arms. You may need to use a thicker or thinner spacer depending on your<br />

servo. 3/8” is what worked for the HS-81MG servo used in the prototype.<br />

© 2005 3D Foamy All Rights Reserved


Page 17<br />

15. Attach the 1/8” lite-ply servo arm extension to the nylon servo arm with two<br />

screws as shown. You may need to experiment to find the exact hole<br />

locations that result in both wings swinging identically forward to back—<br />

and those locations may not be symmetrical. I found that the left wing<br />

needs a little longer moment arm than the right wing to swing equally. If<br />

one wing swings more than the other, simply increase the moment arm on<br />

that side. The already laser cut positions are what worked (after much<br />

experimenting) with the HS-81MG servo used in the prototype.<br />

Also note that if this horn seems weak to you (only .25” wide), that’s by<br />

design! This servo arm is intended to be the weak link in the wing swing<br />

mechanism. That way, if you catch a wing on landing, this horn will break<br />

before anything else in the system breaks. This is good because this horn<br />

is easy and quick to replace via the hatch in the top of the fuselage. This<br />

design has already paid off for me—I had a crash landing in one of the<br />

early flights and this arm broke just as intended, preventing any further<br />

damage to the wing or swing mechanism!<br />

16. Glue 1/8” lite-ply strengthener to the bottom of the servo tray as shown.<br />

Then check the fit of the servo and trim as required. When done, the<br />

assembly should look like the picture on bottom.<br />

A Hitec HS-81MG servo was used on the prototype, which works OK but is<br />

definitely straining in this application. An HS-85MG servo is a little<br />

heavier but provides more torque and will work better for most and is<br />

recommended. But whatever servo you choose, make sure to use a<br />

METAL geared servo since a nylon geared servo is very likely to strip.<br />

© 2005 3D Foamy All Rights Reserved


17. Glue the servo tray on the bottom of the spacer.<br />

Page<br />

18<br />

Make and install the wing swing pushrods using 2-56”” threaded rods with<br />

steel clevises on each side. Silver solder the inside clevices onto the rod.<br />

18. Now plug the servo into your receiver and test the wing swing mechanism,<br />

adjusting it as required until it works perfectly. You want both wings to<br />

swing easily and also swing the same amount. If one wing swings more<br />

than the other, adjust the control throws on the servo control arm. If the<br />

wings tend to bind, sand the swing arms down in thickness. Use the<br />

buzzing of the servo to tell you where the problems are—it’ll buzz heavily if<br />

it encounters something it doesn’t like!<br />

For reference, there are mechanical stops on both ends of the wing swing<br />

travel. The step in the wing trailing edges should just touch the back of the<br />

wing swing spar box when the wings are swept fully aft. And the control<br />

arms on the wing swing arms should hit the forward side of the spacer<br />

inside the spar box when the wings are fully forward. Use those extremes<br />

to gauge how much swing is required.<br />

Note that a key feature of this design is that it is independent from the rest<br />

of the airframe. Thus, everything can be tested and adjusted to work<br />

perfectly BEFORE you install it.<br />

© 2005 3D Foamy All Rights Reserved


Page 19<br />

19. Test fit the wing swing box onto the fuselage. The forward side of the spar<br />

box butts up against the step in the inlet tops. Cut clearance holes as<br />

shown for the wing pushrods on the top of each inlet side (4 total). Be<br />

sure to make those holes wide enough to clear the pushrods throughout<br />

the entire swing of the wings.<br />

Use this forward wing strake piece as a guide to help you glue the spar<br />

box in with perfect alignment. First test fit the wing strake piece to ensure<br />

it fits well and trim as required. Then draw centerlines on everything<br />

(strake, fuselage, spar box) to help align everything. After you’re confident<br />

everything fits well and is aligned, glue in the spar box and strake together<br />

using epoxy.<br />

Note that the wings are easily removable on this model, even after it’s<br />

finished. To remove the wing, just pull out the nylon bolts at the wing pivot<br />

and unsnap the clevis on the servo arm (using needle-nose pliers through<br />

the access hatch on top). Then slide the wing out, being careful to pull the<br />

pushrods carefully through the clearance holes. Reverse this procedure to<br />

put the wing back on, being careful to guide the wing pushrods back<br />

through the clearance holes. Note there’s no need to ever take the clevis<br />

off the wing control arm—use the clevis at the servo instead.<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

20. Next install the tailerons. Each taileron has a .21” diameter carbon spar<br />

that pivots inside two small pieces of laser cut plastic which are glued to<br />

the foam inside the inlets. The ply discs keep the rod from moving side to<br />

side.<br />

20<br />

Begin by sanding the tailerons to shape. Sand the leading edges to a wellrounded<br />

shape and the trailing edges to a tapered shape. Put a strip of<br />

3M Satin tape on the leading edges to provide durability and smoothness.<br />

Also put a few layers of Satin tape on the forward root of the tailerons to<br />

increase strength.<br />

If you have not already, glue the plastic discs onto the fuselage sides.<br />

Make sure to put the carbon rods in the bearings while the epoxy cures to<br />

ensure everything is aligned. Then glue the spars into the tailerons using<br />

epoxy.<br />

After the glue is cured, slide the carbon rods through the plastic bearings<br />

and slide the end stops and control horns onto each rod (but don’t glue<br />

them yet).<br />

Hitec HS-55 micro servos were used on each taileron in the prototype<br />

(shown at bottom) and are the bare minimum servos that will work.<br />

However, a slightly stronger mini servo is recommended, such as the JR<br />

241 shown in the middle picture. Don’t use a larger servo than that,<br />

though, since it may make the model tail heavy.<br />

Install the servo and use the pushrod of 1/16” music wire. An EZ<br />

connector provides a strong control linkage that’s easy to adjust. Set the<br />

length of the pushrod so that the servo arm and taileron control arm are<br />

perfectly vertical. I you can CA, or use tape to hold the servos in place,<br />

combined with the friction from a tight-fitting hole in the foam.<br />

Adjust as required until everything is aligned—the control arms are<br />

vertical, the tailerons are level, and the end stops fit snugly against the<br />

inlet sides. Then put a few drops of CA on the end stops and taileron<br />

control horns to secure them in place. NOTE: it may work easier to put the<br />

control horns the opposite way as shown, facing down to clear the rudder<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

doublers.<br />

21. Glue the vertical tail support doublers to the inside of each inlet top piece,<br />

making left and right versions. Then cut the slot for the vertical tails at a<br />

roughly 5 degree cant angle (canted outboard). Use a heat gun to form<br />

the small curve in the aft end for the exhaust nozzle.<br />

21<br />

Glue the inlet top pieces onto the inlets. Note that the forward edge of<br />

these pieces butts up against the rear edge of the wing spar box.<br />

© 2005 3D Foamy All Rights Reserved


Page 22<br />

22. Install the speed control and battery extension wiring. Note that the<br />

battery extension wiring should be twisted and then wrapped with<br />

aluminum foil to reduce RF interference. In the photo here, the speed<br />

control is installed inside the airplane. However, I later learned (the hard<br />

way) that the speed control must be installed OUTSIDE the airplane to<br />

provide cooling and prevent shutdown due to overheating. So cut a hole in<br />

the bottom of the fuselage and route the wiring so that the speed control is<br />

located on the bottom outside of the airplane (see bottom picture).<br />

Laminate the 2 parts for the wing cover center support and glue in place<br />

on the back of the wing spar box (shown in the top picture).<br />

23. Sand the vertical tails to shape, giving the leading edges a round shape<br />

and the trailing edges a tapered shape.<br />

If you’re installing rudders, cut those out and hinge them with Satin tape.<br />

Glue the tails in place using epoxy, canting them outboard at a 5 degree<br />

angle.<br />

© 2005 3D Foamy All Rights Reserved


Page 23<br />

24. If you’re installing rudders on this model, install the control runs now. I<br />

used Sullivan light flexible cable pushrods, with 1/32” music wire soldered<br />

on the rudder end and Dubro micro EZ connectors on the servo end. Note<br />

the two small pieces of scrap foam that support the cables near the servo.<br />

Rudders are nice to have and are useful during aerobatics and very low<br />

speed maneuvering. But they are not required for this model to fly well<br />

and may not be worth the effort for most.<br />

25. Install the center aft fuselage top piece using epoxy.<br />

26. Now install all the remaining wing strake pieces, including the aft upper<br />

wing cover (2 pieces) and the forward and aft lower strake pieces.<br />

Note that the forward lower wing strake pieces may need to be notched<br />

inside a little to clear the wing swing pushrods.<br />

Install the turtledeck sides and top. Note that the turtledeck sides are<br />

glued on at a roughly 15 degree angle (canted inboard) to give them that<br />

characteristic F-<strong>14</strong> shape.<br />

© 2005 3D Foamy All Rights Reserved


27. Sand the wing strake and turtledeck to shape as shown.<br />

Page<br />

24<br />

To reduce the friction of the wing swing mechanism, place a single layer of<br />

packing tape on the insides of the wing slot (top only) and on the top and<br />

bottom of the wing root (but only where it contacts the wing slot). Bare<br />

foam and plywood joints may swing freely on the bench, but once the wing<br />

gets deflected with 1g flight loads these joints need packing tape to keep<br />

the friction down.<br />

© 2005 3D Foamy All Rights Reserved


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25<br />

28. Cut an access hole for the wing swing servo as shown. Also cut the<br />

access hole for the receiver (not shown here, but shown on the plans) and<br />

install the receiver. Tape can be used to hold both hatches on.<br />

© 2005 3D Foamy All Rights Reserved


Page 26<br />

29. The canopy is removable to allow easy access to the battery compartment.<br />

It is held in place with two bamboo skewers forward (toothpicks or carbon<br />

rod could also be used) that slide into matching holes in the forward<br />

bulkhead, and two small strips of Velcro aft that are mounted to short<br />

pieces of ¼” balsa triangle stock.<br />

Cut two 2” lengths of bamboo and sharpen both ends. Stick the bamboo<br />

into the foam at the front of the canopy so that only ½” protrudes and glue<br />

into place.<br />

After the glue dries, push the canopy onto the airplane so that the<br />

protruding ends poke holes into the forward bulkhead. Then glue the<br />

Velcro mounts to the fuselage sides as shown on the plans and attach the<br />

matching Velcro pieces to the mounts and to the canopy.<br />

30. Install the motor and plug it into the speed control leads.<br />

Install the prop. Using a prop-saver is a very good idea to prevent damage<br />

to the prop or airplane during landings.<br />

© 2005 3D Foamy All Rights Reserved


31. CONGRATULATIONS! Your model is now complete.<br />

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27<br />

The model can be painted using standard acrylic craft paint (available at<br />

most craft stores), applied with either a brush or airbrush. Wipe the foam<br />

with rubbing alcohol before painting to remove any grease or dirt. Rough<br />

areas such as the canopy and nosecone should be filled with lightweight<br />

wall spackling compound thinned with water, which fills the holes and can<br />

be sanded to a very smooth finish (with minimal weight gain). Try to<br />

minimize weight as much as possible when selecting your paint scheme.<br />

I hope you enjoy this model as much as I have!<br />

© 2005 3D Foamy All Rights Reserved


Additional Photos<br />

Here are some additional photos of the prototype F-<strong>14</strong> <strong>Tomcat</strong> <strong>Park</strong> <strong>Jet</strong> for reference<br />

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28<br />

© 2005 3D Foamy All Rights Reserved


Page<br />

29<br />

Flight Setup<br />

1. The center of gravity location is critical on this model. Make sure to locate it as shown on the plans for your first flights,<br />

which is 0.5” ahead of the wing pivot bolts. Depending on how your model is built and set up, you may need to add ballast to<br />

the nose to achieve this CG (the prototype model required about 0.75 oz of ballast in the nose). After you’ve gained some<br />

experience flying this model and have it trimmed out, the CG can be moved as far aft as the wing pivots for improved<br />

maneuverability.<br />

2. Set up the flight controls to provide the following recommended deflections (all dimensions are measured at the root trailing<br />

edge):<br />

• Tailerons (pitch): +/- 1.5" (-40% expo)<br />

• Tailerons (roll): +/- 1.75" (-40% expo)<br />

• Rudder: +/- 7/8" (-30% expo)<br />

Note that these settings will work fine with the wing in all sweep positions. The F-<strong>14</strong> is naturally quick in pitch and sluggish in<br />

roll with the wings fully unswept, but quick in roll and sluggish in pitch with the wings fully swept aft. However, these control<br />

deflections provide a good compromise for both cases so that you don’t have to flick a switch every time you change the wing<br />

sweep.<br />

3. Note that the F-<strong>14</strong> has a natural aerodynamic tendency to pitch down slightly when the wings are swept from forward to aft.<br />

To counter this and keep the airplane trimmed, a custom mix must be set up in the transmitter to automatically add a small<br />

amount of up elevator trim as the wing is swept aft. This mix should be set up so that swinging from full forward to full aft<br />

sweep provides 1/4" trailing edge up stabilator (about 5% mix rate if using the recommended control deflections). You may<br />

need to experiment with your particular model to find the mix that works best, but once you’ve got this adjusted properly you<br />

can swing the wings forward and aft at will at any time during the flight and the airplane will always stay perfectly trimmed.<br />

4. Recommended hand launch procedure: Grip the airplane by either the left or right inlet near the CG, set about 75% throttle,<br />

and throw the model moderately hard straight ahead and parallel to the ground. Be careful to keep your hand away from<br />

the prop as you throw it! It’s important to launch at less than full throttle to minimize prop torque effects at launch, which<br />

could cause the model to roll left immediately after you throw it. Full throttle can be added right after launch once the airplane<br />

has some speed.<br />

5. Landing: Remember to ALWAYS release the elevator control right before touchdown during landings, since the<br />

forward stabilator tips can dig into to grass or soft ground—which can significantly damage the model and/or<br />

stabilator servos! A good hard flare a couple feet off the ground will slow the model down to a very low airspeed, then simply<br />

release the elevator and let the model plop gently onto the ground. Also remember to pull the throttle back to zero just before<br />

touchdown so that the propeller and/or motor mount is not damaged on landing.<br />

© 2005 3D Foamy All Rights Reserved


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30<br />

Repairs<br />

Should the inevitable happen, here are some tips:<br />

• Cracks in the foam are fixed with some foam safe CA. Just use accelerator to speed up the process.<br />

• Almost anything is repairable. I cracked my plane in 5 pieces, and everyone thought it was finished. 15 minutes later it was<br />

flying. Just take some CA, accelerator and packing tape to the field with you!<br />

If you are using more then 2 bottles of CA a day for fixes… order some more kits!<br />

Best of flying to you, and I hope you have enjoyed building this kit as much as I have designing them!<br />

Remember to send your pictures and videos to post on the website!!!<br />

“I live for this stuff!”<br />

3D Foamy<br />

support@3DFoamy.com.com<br />

www.3DFoamy.com<br />

© 2005 3D Foamy All Rights Reserved

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