Great Planes GPMA0232 User Manual

WARRANTY

Great Planes Model Manufacturing Co. guarantees this kit to be free from defects in both material and
workmanship at the date of purchase. This warranty does not cover any component parts damaged by use or
modification. In no case shall Great Planes' liability exceed the original cost of the purchased kit. Further, Great
Planes reserves the right to change or modify this warranty without notice.

In that Great Planes has no control over the final assembly or material used for final assembly, no liability shall be
assumed nor accepted for any damage resulting from the use by the user of the final user-assembled product. By the
act of using the user-assembled product, the user accepts all resulting liability.

If the buyers are not prepared to accept the liability associated with the use of this product,they are advised
to return this kit immediately in new and unused condition to the place of purchase.

READ THROUGH THIS INSTRUCTION MANUAL
FIRST. IT CONTAINS IMPORTANT INSTRUCTIONS
AND WARNINGS CONCERNING THE ASSEMBLY
AND USE OF THIS MODEL.

CAP4P03 V1.0 Entire Contents © Copyright 1998

P.O.Box 788 Urbana, IL 61801 [phone]

www.greatplanes.com

INSTRUCTION MANUAL

MADE IN

USA

SAFETY PRECAUTIONS..................................................2

INTRODUCTION ...............................................................2

DECISIONS YOU MUST MAKE .......................................3

Engine Selection............................................................3

Exhaust System.............................................................3

Servo Selection..............................................................3

PREPARATIONS ..............................................................3

Required Accessories....................................................3

Building Supplies & Tools...............................................4

Optional Supplies & Tools ..............................................4

Building Notes ...............................................................5

Types of Wood................................................................5

Common Abbreviations..................................................5

Metric Conversions ........................................................5

Get Ready to Build.........................................................5

DIE-CUT PATTERNS .................................................6 & 7

BUILD THE T AIL SURF ACES............................................8

Build the Stab.................................................................8

Elevator Building Sequence...........................................9

Fin Building Sequence...................................................9

Rudder Building Sequence ............................................9

Hinge the Tail Surfaces ..................................................9

Finish the Tail Surfaces................................................10

BUILD THE WING............................................................11

Make the Wing Sheets.................................................11

Build the Wing Panels..................................................12

Join the Wing Panels....................................................15

Sheet the Wing.............................................................16

Build the Ailerons.........................................................16

BUILD THE FUSELAGE..................................................18

Assemble the Fuselage Former & Sides......................18

Assemble the Fuselage................................................20

Mount the Wing to the Fuselage..................................21

Build the Front Fuselage Deck.....................................25

Mount the Stabilizer to the Fuselage............................26

Build the Turtledeck......................................................27

Mount the Engine.........................................................29

Install the Battery & Tank .............................................30

Install the Servos and Make the Pushrods...................31

Add the Forward & Aft Wing Fairings...........................33

Assemble the Wheel Pants..........................................34

Assemble the Cowl ......................................................36

Prepare the Model for Covering...................................37

COVER THE MODEL.......................................................37

Covering Technique......................................................37

Suggested Covering Sequence ...................................37

BALANCE THE MODEL LATERALLY............................38

PAINTING........................................................................38

FINAL HOOK-UPS AND CHECKS.................................38

Join the Control Surfaces.............................................38

Install the Hardware.....................................................39

Attach the Canopy........................................................39

Set the Control Throws.................................................40

Balance the Model .......................................................40

PREFLIGHT.....................................................................41

Charge the Batteries....................................................41

Balance the Propeller...................................................41

Find a Safe Place to Fly...............................................41

Ground Check the Model.............................................41

Range Check the Radio...............................................42

Engine Safety Precautions...........................................42

AMA Safety Code.........................................................42

FLYING ............................................................................43

Takeoff..........................................................................43

Flight ............................................................................43

Landing ........................................................................43

TWO VIEW DRAWING.................................BACK COVER

Your CAP 232 is not a toy, but rather a sophisticated,
working model that functions very much like an actual
airplane. Because of its realistic performance, the CAP, if
not assembled and operated correctly, could possibly cause
injury to yourself or spectators and damage property.

If this is your first low wing sport model we
recommend that you get help from an experienced,
knowledgeable modeler with your first flights. You'll

learn faster and avoid risking your model before you're truly
ready to solo.Your local hobby shop has information about
flying clubs in your area whose membership includes
qualified instructors.

You may also contact the national Academy of Model
Aeronautics (AMA), which has more than 2,500 chartered
clubs across the country.

Academy of Model Aeronautics

5151 East Memorial Drive

Muncie, IN 47302-9252

Tele. [phone]

Fax [phone]

Congratulations and thank you for purchasing the Great
Planes CAP 232. The CAP is a rather "square" airplane
with well-defined lines. Coincidentally, this makes it
exceptionally easy to build and cover–especially for a semi­scale sport model. Framing the model is very
straightforward, as most of the structure features
interlocking balsa and lite-ply. The turtledeck sheeting may
look a little intimidating but in actuality it is quite easy to
apply if you follow the instructions.

Flying the CAP 232 is a rewarding experience–as it should
be for such an aerobatic model! It doesn't take much
elevator or aileron throw to put the CAP through its paces.
When you have a feel for your CAP 232, the throws can be
increased to high rates (illustrated in the instructions) to

INTRODUCTION

PROTECT Y OUR MODEL,YOURSELF

& OTHERS...FOLLOW THIS

IMPORTANT SAFETY PRECAUTION

TABLE OF CONTENTS

2

really showcase the aerobatic potential.The CAP performs
surprisingly well on a ball bearing Schneurle por ted .40,
but seasoned experts will surely want to get the most out of
the CAP by bolting on a .46 2-stroke or a .70 4-stroke.

We hope you enjoy building and flying your Great Planes
CAP 232 as much as we did the prototypes.

Please inspect all parts carefully before starting to build!
If any parts are missing, broken or defective, or if you
have any questions about building or flying this
airplane, please call us at [phone]. If you are
calling for replacement parts, please reference the part
numbers and the kit identification number (stamped on
the end of the carton) and have them ready when calling.

Product info – www.greatplanes.com

E-mail – [e-mail]

1. Build the plane according to the plans and instructions.
Do not alter or modify the model, as doing so may result in
an unsafe or unflyable model. In a few cases the plans and
instructions may differ slightly from the photos. In those
instances the plans and written instructions are correct.

2.Take time to build straight, true and strong.

3. Use an R/C radio system that is in first-class condition,
and a correctly-sized engine and components (fuel tank,
wheels, etc.) throughout your building process.

4. You must properly install all components so that the
model operates properly on the ground and in the air.

5.You must check the operation of the model before every
flight to ensure that all equipment is operating, and that the
model has remained structurally sound. Be sure to check
nylon clevises or other connectors often and replace them if
they show signs of wear or fatigue.

6. If you are not already an experienced R/C pilot you must
fly the model only with the help of a competent, well
experienced R/C pilot.

Remember:Take your time and follow directions to end
up with a well-built model that is straight and true.

Items in parentheses (OSMG2691) are suggested part
numbers recognized by distributors and hobby shops and
are listed for your ordering convenience. GPM is the Great
Planes brand, TOP is the Top Flite®brand, and HCA is the
Hobbico®brand.

❏ 4 Channel Radio with 4 Servos
❏ Engine -

See

Engine Selection above

❏ Muffler -

See

Exhaust System above

❏ Spare Glow Plugs (O.S.#8 for most 2-stroke engines,

OSMG2691)

❏ Propeller (Top Flite

®

Power Point™) we found that a
11x4 on the O.S. .46FX and the 13x6 on the O.S. .70
Surpass worked the best.

❏ Top Flite Super MonoKote

®

covering (Approximately 2

rolls);

See

Covering (page 37)

Required Accessories

PREPARATIONS

Engine Selection

There are several engines that will work well in your CAP
232, but for unlimited performance we recommend a

hot

2-stroke such as an O.S.®.46FX or SuperTigre™GS-45. If
you prefer a 4-stroke, an O.S. .70 Sur pass™is the ticket.
Your choice of 2-stroke or 4-stroke will determine the
location of the throttle servo and throttle pushrod exit on the
firewall, so plan ahead.

Exhaust System

If you choose to use a 2-stroke engine, you will need an
in-cowl muffler for the best appearance. On our prototype
CAP 232 with the O.S. .46FX we used the Slimline #3218
Pitts Muffler (SLIG2218) without the exhaust extension kit.If
you prefer to use an exhaust extension kit, you can always
purchase #8012 (SLIG5012) for this exhaust. On our
prototype CAP 232 with the O.S. 70 Sur pass, we used the
O.S.short flex pipe (0SMG2684) and the included muffler to
make the exhaust e xit in the scale location.

Servo Selection

During our extensive testing of the CAP 232, we found that
the CAP performs very well with standard Futaba®S3003
servos on all surfaces. However, for all-out 3D aerobatics,
the seasoned expert will want to consider high performance
servos such as the Futaba 9001 for elevator and rudder.
The additional torque, speed and centering capabilities of
these servos will provide crisper performance in everything
from slow rolls to hammerheads, torque rolls, knife edge
loops and beyond.

DECISIONS YOU MUST MAKE

NOTE: We, as the kit manufacturer, provide you with a

top quality kit and great instructions, but ultimately the
quality of your finished model depends on how you build
it; therefore, we cannot in any way guarantee the
performance of your completed model, and no
representations are expressed or implied as to the
performance or safety of your completed model.

PRECAUTIONS

3

❏ Fuelproof paint;

See

Painting (page xxxx)

❏ Medium Fuel Tubing (GPMQ4131, 3')
❏ 1/4" Latex Foam Rubber Padding (HCAQ1000)
❏ 1/16" Foam Wing Seating Tape (GPMQ4422)
❏ 10 oz.Fuel Tank (GPMQ4104)
❏ (2) 2-1/2" Wheels (GPMQ4223)
❏ (1) 3/16" Wheel Collar (GPMQ4308)
❏ (2) 3/32" Wheel Collars (GPMQ4303)
❏ 2-1/2" Spinner (GPMQ4517 – red)
❏ Pilot (Williams Bros. 1/5 Scale Spor tsman Pilot used

in prototype, WBRQ2626)

❏ Fueling System (Great Planes Top Fueler,

™

GPMQ4160)

❏ Pacer Formula 560 Canopy Glue
❏ 1" Tail wheel (GPMQ4241)

These are the building tools, glue, etc. that we recommend
and mention in the manual.

We recommended Great

Planes Pro™CA and Epoxy

❏ 2 oz.Thin CA (GPMR6003)
❏ 2 oz.Medium CA+ (GPMR6009)
❏ CA Accelerator (GPMR6035)
❏ 30-Minute Pro Epoxy (GPMR6047)
❏ Building Square (HCAR0480)
❏ Plan Protector (GPMR6167)
❏ #1 Hobby Knife Handle (HCAR0105)
❏ #11 Blades (HCAR0311, 100 qty.)
❏ Razor Saw
❏ Small T-pins (HCAR5100)
❏ Medium T-pins (HCAR5150)
❏ Masking Tape
❏ Electric Power Drill
❏ 1/4-20 Tap (GPMR8105, drill bit included)
❏ Drill Bits:1/16", 3/32", 7/64", 1/8", 5/32", #18 or

11/64", 3/16", #10 or 13/64" (unless purchased with
1/4-20 Tap listed above), 7/32", 1/4", 17/64"

❏ Pliers
❏ Monofilament String for aligning wing and stabilizer
❏ Screwdrivers (Phillips and Flat Blade)
❏ HobbyLite

™

Balsa Filler (HCAR3401)

❏ Sealing Iron (TOPR2100)
❏ Bar Sander or Sanding Block and Sandpaper (coarse,

medium, fine grit)

❏ Microballoons

In our busy work shop we use the Great Planes

Easy-Touch

™

Bar Sanders equipped with Great Planes

#80, #150 and #220-grit Easy-Touch Adhesive-Backed

Sandpaper. Great Planes Easy-Touch Bar Sanders are
made from lightweight, rigid, extruded aluminum and can
be found at most hobby shops.

They are available in three sizes–5-1/2" (GPMR6169) and
11" (GPMR6170) for most general purpose sanding and
22" (GPMR6172) for long surfaces such as wing leading
edges. The Easy–Touch Adhesive-Backed Sandpaper
comes in 2" x 12' rolls of 80-grit (GPMR6180), 150-grit
(GPMR6183), 220-grit (GPMR6185) and an assortment
pack of 5-1/2" long strips (GPMR6189) for the short Bar
Sander. The adhesive backed sandpaper is easy to apply
and remove from your sanding bar when it's time
for replacement.

This setup is all that is required for almost any sanding
task. Custom sanders can be made from balsa or
hardwood blocks and sticks for sanding difficult to reach
spots. We also keep some #320-grit wet-or-dry sandpaper
for finish sanding just before covering.

❏ 1 oz.Thick CA- (GPMR6014)
❏ 6-Minute Pro Epoxy (GPMR6045)
❏ CA Applicator Tips (HCAR3780)
❏ Epoxy Brushes (GPMR8060)
❏ Epoxy Mixing Sticks (GPMR8055, qty. 50)
❏ CA Debonder (GPMR6039)
❏ Hot Sock (TOPR2175)
❏ Trim Seal Tool (TOPR2200)
❏ Heat Gun (TOPR2000)
❏ Single Edge Razor Blades (HCAR0312, 100 qty.)
❏ Razor Plane (MASR1510)
❏ Straightedge (Fourmost Non Slip, FORR2149)
❏ 1/8" Brass Tube, see page 17, step 10
❏ 5/32" Brass Tube, see page 33, step 15
❏ Denatured or Isopropyl Alcohol (for epoxy clean-up)
❏ Dremel MultiPro

™

or similar w/Sanding Drum, Cutting

Burr, Cut-off Wheel

❏ Kyosho

®

Curved Scissors for trimming Cowl, Wheel

Pants and Canopy (KYOR1010)

Optional Supplies and Tools

Building Supplies and Tools

4

5

There are two types of screws used in this kit:
Sheet metal screws are designated by a number and
a length.

For example #4 x 3/4"

Machine screws are designated by a number, threads per
inch and a length.

For example 4-40 x 3/4"

When you see the term “test fit” in the instructions, it
means you should first position the part on the assembly
without using any glue, then slightly modify the part as
necessary for the best fit.

Whenever just “epoxy” is specified you may use

either

30-minute epoxy or6-minute epoxy. When 30-minute epoxy
is specified it is highly recommended that you use only
30-minute (or slower) epoxy because you will need either
the working time and/or the additional strength.

Several times during construction we refer to the “top” or
“bottom” of the model or a part of the model. For example,
during wing construction we tell you to “glue the top main
spar” or “trim the bottom of the former.” It is understood that
the “top” or “bottom” of the model is as it would be when the
airplane is right side up and will be referred to as the “top”
even if the model is being worked on upside down,

i.e.

the
“top” main spar is always the “top”main spar even when the
wing is being built upside down.

Elev = Elevator Fuse = Fuselage

LE = Leading Edge (front) LG = Landing Gear

Ply = Plywood Stab = Stabilizer

TE = Trailing Edge (rear) " = Inches

1. Unroll the plan sheets. Reroll the plans inside out to
make them lie flat.

2. Remove all parts from the box. As you do, determine the
name of each part by comparing it with the plan and the
parts list included with this kit. Using a felt-tip or ballpoint
pen, lightly write the part name or size on each piece to
avoid confusion later. Use the die-cut patterns shown on
pages 6 and 7 to identify the die-cut parts and mark them
before removing them from the sheet. Save all scraps. If
any of the die-cut parts are difficult to punch out, do not
force them! Instead, cut around the parts with a hobby
knife. After punching out the die-cut parts, use your bar
sander or sanding block to lightly sand the edges to
remove any die-cutting irregularities or slivers.

3. As you identify and mark the par ts, separate them into
groups, such as fuse (fuselage), wing, fin, stab (stabilizer)
and hardware.

Zipper-top food storage bags are handy for storing your
parts as you sort, identify and separate them into
sub-assemblies.

Get Ready to Build

1/64" = .4mm
1/32" = .8mm
1/16" = 1.6mm
3/32" = 2.4mm

1/8" = 3.2mm
5/32" = 4mm
3/16" = 4.8mm

1/4" = 6.4mm

3/8" = 9.5mm

1/2" = 12.7mm

5/8" = 15.9mm

3/4" = 19mm

1" = 25.4mm
2" = 50.8mm
3" = 76.2mm

6" = 152.4mm
12" = 304.8mm
15" = 381mm
18" = 457.2mm
21" = 533.4mm
24" = 609.6mm
30" = 762mm
36" = 914.4mm

1" = 25.4mm (conversion factor)

Metric Conversions

Common Abbreviations

Balsa Basswood Plywood

Types of Wood

Building Notes

6

DIE-CUT PATTERNS

7

DIE-CUT PATTERNS

❏ 1. Cover the stab portion of the plan with wax paper or

Plan Protector. Pin the die-cut 1/8" balsa stab LE doubler
in position over the plan. Glue the die-cut 1/8" balsa stab
center to the LE doubler with medium CA.

❏ 2. Using two of the 1/8" x 1/2" x 24" balsa sticks, cut and

fit the stab LE, TE, and tips.
Hint: Use a straightedge as a guide to make sure the stab
TE is straight before pinning in place. Glue the stab LE's,
TE, and tips in place with thin CA.

❏3.From the 1/8" x 1/4" x 24" balsa stick, fit and glue the four

cross braces in place. Do the same with a 1/8" x 1/8" x 30"
balsa stick to finish the remaining cross bracing.

❏ 4. Use your bar sander or a large sanding block and

220-grit sandpaper to sand the entire top and bottom
surface of the stab framework until it is flat and even. Be
careful while sanding so you do not over-thin any one
particular area of the stab or gouge the stab cross braces
by snagging the sandpaper on them.

❏❏5. Using medium CA, glue one 1/16" x 3" x 24" balsa

sheet to one side of the stab framework, aligning the
sheeting parallel to the TE of the stab. Give the CA ample
time to cure before lifting the assembly off the work bench.

❏❏6. Place the sheeted side of the stab on your bench and

trim the sheeting around the outer edges of the framework.

❏7.Repeat steps 5 and 6 to sheet the other side of the stab.

❏ 8. Place the sheeted stab back in place over the plan

and, using the dotted lines as a reference, draw a line on
the stab. Trim the leading edge of the stab on the line you
just drew.

There, that was kind of fun wasn't it? Let's continue to build
the elevators, fin, and rudder.

❏ 9. Make two laminated elevator balance tabs from the

four 1/8" die-cut balsa pieces.Make one rudder balance tab
from the two die-cut pieces.

❏ 10. Build the elevators, fin and rudder from the 1/4" thick

balsa sticks (unlike the 1/8" sticks you used for the stab).
Recommended building sequences follow.

Note: Do not glue the elevator or rudder balance tabs in
place until the leading edges are beveled.

Note: Refrain from using excessive accelerator. Even hours
after it's sprayed on, residual accelerator can prematurely
and unexpectedly cure the CA you use later on nearby glue
joints. Unless you must handle or remove the part from your
building board right away, we recommend using no
accelerator at all.

Build the Stab

BUILD THE T AIL SURFACES

8

A.1/4" x 1/2" LE pin in place
B.1/4" x 1/2" Root rib pin and glue
C.1/4" x 1/2" elevator tip rib fit and glue
D.1/4" x 1/2" TE fit and glue
E.1/4" x 1/4" ribs fit and glue
F. 1/8" x 1/4" diagonal ribs fit and glue
G.1/4" x 1/2" diagonal rib fit and glue
H.Remove the elevator from the plan and inspect all the

glue joints.Add CA where necessary.

I. Sand flat and smooth with bar sander and 220-grit

sandpaper. Note: Do not glue the laminated balance
tab in position until

after

you bevel the leading edge
of the elevator as instructed on page 11. This will
make it easier to sand the bevel.

J. Build the other elevator the same as the first.

A.Laminate the two die-cut 1/8" balsa Fin Bases

together and pin them in place.

B.1/4" x 1/2" TE
C.1/4" x 1/2" Fin tip
D. 1/4" x 1/2" LE (cut taper so it fits against F-9 as

shown on the plan)

E.1/4" x 1/2" center rib
F. 1/4" x 1/8" diagonal ribs
G. Remove the fin from your building board and inspect all

the glue joints. Add CA where necessary. Use your bar
sander to sand the top of the leading and trailing edges
even with the tip of the fin.Sand the bottom of the leading
edge even with the base. Sand the entire fin flat and
smooth with your bar sander and 220-grit sandpaper.

A.1/4" x 1/2" LE
B.1/4" x 1/2" Rudder bottom
C.1/4" x 1/2" TE
D.Two 1/4" x 1/2" ribs
E.One 1/4" x 1/2" diagonal rib
F. Two 1/8" x 1/4" diagonal ribs
G. Remove the rudder from your building board and

sand the top, the LE and TE so they are flush.
Note: Do not glue the laminated balance tab in
position until

after

you bevel the leading edge of the
rudder as instructed on page 11. This will make it
easier to sand the bevel.

H.Inspect all the glue joints. Add CA where necessary.

❏ 1. Place the stab over its location on the plan and

lightly

mark the hinge locations on the trailing edge with a ball
point pen. Mark the hinge locations on the elevators in the
same manner.

HOW TO MARK THE HINGE SLOTS

It's important that the hinge slots are centered and parallel to
the part you are hinging. The best way to start is by accurately
marking the hinge slots.We'll start with the stabilizer.

A. Lay the stabilizer and a ballpoint pen on a flat surface.
Mark a “test line” on the trailing edge of the stab, away from
the hinge locations you marked earlier.

Hinge the Tail Surfaces

Rudder Building Sequence

Fin Building Sequence

Elevator Building Sequence

9

B.Flip the stab over and mark another line in the same location

as the first.If you see only one line, then it is on center.Proceed
and mark the hinge slots at each hinge location. If you see two
lines you will have to adjust the height of the stab until you can
mark only one centerline.

C. Use playing cards or business cards to adjust the height
of the stabilizer until you can mark the centerline. Mark the
hinge slots at each hinge location.

D. Use the same technique to mark the centerline along the
entire length of both elevators.

❏ 3. Cut the hinge slots in the elevator and stabilizer using

a #11 blade.Begin by carefully cutting a very shallow slit at
the hinge location to accurately establish the hinge slot.
Make three or four more cuts going a little deeper each
time. As you cut, slide the knife from side to side until the
slot has reached the proper depth and width for the hinge.

❏ 4. Cut 3/4" x 1" hinges for the elevators and rudder from

the supplied 2" x 9" hinge material, then snip off the
corners. Temporarily join the elevators to the stab with the
hinges adjusting any hinge slots if necessary so they all
align. Do not glue in the hinges until you are instructed

to do so.

❏ 5. Retur n to step 1 and use the same procedures to

hinge the rudder and fin.

❏ 1. Shape the leading edge of the elevators to a “V” as

shown on the plan.

HOW TO BEVEL THE LEADING EDGES

A. Place the leading edge of one of the elevators on your

work surface and use your ballpoint pen to mark a “bevel
to” line on both sides about 3/32" high.

Note: You will probably have to adjust the height of the
elevator with card stock (as you did while marking the hinge
slots) so your “bevel to” line is not too high – making too
sharp of a “V.”

B. Using the “bevel to” lines and the centerline as a guide,
make the “V” on the leading edge of the elevators with a
razor plane or your bar sander and 150-grit sandpaper.

❏ 2. Use the same procedure to bevel the leading edge of

the rudder.

Finish the Tail Surfaces

10

CUT HINGE SLOT

WITH HOBBY KNIFE

AND #11 BLADE

11

❏ 3. Use the plan to make sure the balance tabs are

properly aligned.Then, using medium CA, glue the balance
tabs to both of the elevators and the rudder.

❏ 4. Use your bar sander and 150-grit sandpaper to round

the tail surfaces as shown on the fuse plan.

That's about it for the tail surfaces. They're a little more
work than sheet surfaces but they are much lighter, just
about as strong, and are a nice piece of craftsmanship.
Clean off your work bench and get ready for the wing!

Now while you have a nice clean work bench, let’s start the
wing by making the sheeting.

❏❏1. Glue two 3/32" x 3" x 30" balsa sheets together to

make one 6" wide sheet for the top and bottom leading
edge wing sheeting for one wing half.

HOW TO MAKE WING SHEETS

A. Use a metal straightedge as a guide to trim one edge of

both sheets.

B. Use masking tape to tightly tape the two sheets together
joining the trimmed edges.

C. Turn the sheet over and place weights on top of the
sheet to hold it flat. Apply thin CA spar ingly to the seam
between the two pieces, quickly wiping away excess CA
with a paper towel as you proceed.

D. Turn the sheet over and remove the masking tape, then
apply thin CA to the seam the same way you did for the
other side.

E. Sand the sheet flat and smooth with your bar sander and
150-grit sandpaper.

Make the Wing Sheets

BUILD THE WING

❏❏2. Cut the sheet as shown in the photo to make a top

and a bottom LE wing sheet.

❏ 3. Repeat steps 1 and 2 to make the two leading edge

wing sheets for the other wing half.

We’ll start by building the right wing panel upside down over
the left wing panel plan so your progress matches the photos .

❏❏1. Using two large T-pins, cross pin the root end of a

5/16" x 5/16" x 30" basswood main spar over its location on
the plan so it lines up with the wing centerline. This is the

top spar. Cross pin the tip of the spar to the plan with a
piece of 3/32" leftover balsa under the spar past the
location of rib R-10.

❏❏2. Place (do not glue) the die-cut 3/32" balsa wing

ribs R-2 through R-10 on the top spar over their locations

on the plan. Note: The short jig tabs on every rib, should
be contacting the plan.

❏ 3. Using the dihedral gauge to set rib R-2 at the proper

angle, pin the jig tabs in place with small T-pins. Again
using the dihedral gauge, pin ribs R-2 through R-10 to your
building board over their location on the plan.
Note: Inser t the T-pins at an angle from the rear, so they
can be removed after the trailing edge and bottom sheeting
are glued in position.

❏❏4. Place a 5/16" x 5/16" x 30" spar in the notches of the

ribs, using the dihedral gauge to locate this bottom spar.

Note: Due to the decreasing thickness of the wing

towards the tip, the top

main spar

is not pinned directly

to the building board. Instead, the

ribs

are securely

pinned to the building board. You must follow the

instructions closely on where to insert the T-pins in the
ribs so you do not conceal them under the sheeting,
making it very difficult to remove the wing from the
building board.

Build the Wing Panels

12

❏❏5. Glue the main spars to the ribs with thin CA. As

you glue each rib to the spars, simultaneously

pull

the top

spar up into the rib and

push

the bottom spar down into the
rib to make sure the spars are fully seated in the notches.
Make sure all the jig tabs are contacting the work surface.

❏❏6. Lightly r un a sanding bar across the front of the r ibs

to check alignment. Position the shaped leading edge (LE)
on the front of the ribs.The LE should be centered on all the
ribs and the root end should extend past rib R-2 by about
1/16". Make sure all the jig tabs are contacting the work
surface.Use thin CA to glue the LE to the front of the ribs.

❏❏7. Place the 30" balsa shaped trailing edge (TE)

against the rear of the rib tabs and flat on the work bench.

Mark the root end so that it lines up with the centerline of
the wing.Take the TE off your work bench and sand the TE
to the mark you made.

❏❏8. Using the dihedral gauge to correctly position the

TE, use thin CA to glue the trailing edge (TE) to the ends of
the ribs.

❏❏9. Starting at ribs R-8 & R-7, test fit the die-cut 3/32"

cross grain balsa shear webs to the front of the spars.
Note that the shear webs increase in height as they get
closer to the root. Glue them in place with medium CA.
There are two additional shear webs for the rib bays
between ribs 2 & 3 and 3 & 4. Glue these to the back of the
spars between these ribs with medium CA.

❏❏10. Use medium CA to glue the 3/32" x 7/8" x 30"

trailing edge sheeting to the TE and ribs so the end
extends past the wing centerline by approximately 1/8".

❏❏11. Without gluing, fit one of the leading edge sheets

to the bottom of the wing panel by sanding a bevel on the
front edge of the sheet so it matches the leading edge of
the wing.

13

❏❏12. Before you glue the LE sheeting in position,

remove the T-pins from the front jig tabs in the wing ribs.

❏❏13.Wet the outside of the leading edge sheeting so it

will bend easier. (Hint: a 50/50 mix of water and alcohol or
ammonia helps break down the wood fibers so the sheet is
even easier to bend). Run a bead of medium CA down the
leading edge of the sheeting. Position the front of the sheet
against the LE of the wing and use accelerator to hold it
there.Wet the sheet once more if needed.

❏❏14. Carefully lift the sheeting away from the ribs.

Working quickly, apply a bead of medium or thick CA to the
top of each rib where the sheeting contacts the spar.

Pull

the sheeting back toward the main spar as you

press

it
down to the ribs and spar. Use masking tape, T-pins or
weights to hold the sheeting to the ribs until the CA cures.

❏❏15. Remove the T-pins, then flip the wing half over on

your building board.

❏❏16. Use a sharp hobby knife to remove the tabs from

the top of the wing. Use a sanding block with 220-grit
sandpaper to clean the edges of the ribs where the tabs
have been removed.

❏❏17. Using a razor saw, trim the spars, LE, TE, LE

sheeting, and TE sheeting flush with R-10.Also trim the LE
and LE sheeting flush with the edges of R-2.

❏❏18. Using the spars and the TE as a guide, sand off

the TE sheeting at the root of the wing.
Note: DO NOT SAND the shaped TE or the spars.

❏ 19. Glue the TE and LE sheeting onto the top of the

wing following the same procedures you used on the
bottom of the wing. (Steps 10-14)

❏ 20. Trim and sand the TE and LE sheeting using the

same procedures you did on the bottom of the wing.
(Steps 16-18)

❏❏21. From the 3/32" x 1/4" x 24" balsa sticks, cut cap

strips and use medium CA to glue them to the top and
bottom of ribs R-4 thru R-10.
Note: Do not put cap strips on R-2 or R-3, as they will be

sheeted after the wing halves are joined.

❏ Repeat steps 1 through 21 to build the left wing panel

over the right wing drawing on the plan.

14

Note: The designer wishes to assure you that the specified
dihedral is correct. Although somewhat out of scale, this
dihedral angle is required to eliminate roll coupling, thus
providng you with a more neutral airplane. A side benefit of
the dihedral is better low speed stability.

❏ 1. From the 1/8" die-cut ply pieces make the five wing

jigs as shown in the photo above.

❏ 2. Without using any glue, test join the wing panels on

the jigs as shown. Make sure the ends of the spars and
TE’s join without any gaps.

❏ 3. Place wax paper under the center of the wing to catch

excess epoxy. When satisfied with the fit, glue the dihedral
braces to the spars with 30-minute epoxy by spreading a
film of epoxy on

both

the spars

and

the dihedral braces,
followed by C-clamps to hold them in place. Once the
C-clamps are tightened, wipe away excess epoxy before it
cures. Place weights on top of your wing to hold it in place
on the jigs.

❏ 4. Glue the TE’s together with thin CA.Do not disturb the

wing until the epoxy cures.

❏ 5. Trim the tabs off of both R-1 wing ribs. Laminate the

two R-1's together with medium CA.

❏ 6. Glue the laminated R-1 in place aligning the bottom of

the rib with the bottom of the spars.

Join the Wing Panels

15

❏ 1. Use medium CA to glue the die-cut 1/8" ply aileron

servo tray and supports in position.Glue the die-cut 1/8" ply

aileron servo tray doublers to the bottom of the aileron servo
tray. Test fit your aileron servo and adjust the notch in rib R-1,
if needed, so the aileron servo will fit.Remove the servo.

❏ 2. Cut the 3/32" x 3" x 36" balsa sheet into one 17-1/4"

long sheet and one 18-3/4" long sheet. Cut the 17-1/4"
piece in half, making two 8-5/8" long pieces. Cut the
18-3/4" piece in half, making two 9-3/8" long pieces.

❏ 3. Cut a curve on the end of one of the sheets, using the

plan as a guide. The curve does not have to be an exact
match. Use that one as a template to mar k and cut the
three other sheets.

❏ 4. Fit and glue the two 8-5/8" long pieces to the top of

the wing.

❏ 5. Fit and glue the two 9-3/8" long pieces to the bottom

of the wing.

❏ 6. Cut pieces from a 3/32" x 3" x 30" balsa sheet to

cover the middle portion on the top and bottom of the wing.

❏ 7. From the remaining 3/32" x 3" x 30" balsa sheet, cut a

7" long piece. Using that 7" piece, cut and fit the aft center
section sheeting.

❏ 8. Using leftover 3/32" balsa, sheet the forward center

section over both top and bottom spars .Sand the sheeting
flush with the dihedral joiner.

❏ 1. Bevel the ends of the tapered, grooved balsa center

trailing edges so they join as shown on the plan. Test fit

the center TE's on the wing.

Build the Ailerons

Sheet the Wing

16

❏ 2. Place the center TE's over the wing plan and mark the

location of the aileron torque rods. Cut notches at the
marks to clear the torque rods. Test fit the torque rods to
make sure the notches allow enough clearance.

❏ 3. Position the center TE's on the wing TE with the

torque rods installed, then mark the location of the notches
on the wing TE. Cut the notches in the wing TE at the
marks you made. Test fit the center TE's with the torque
rods to make sure the notches align and are large enough
to allow for proper aileron deflection.

❏ 4. Use coarse sandpaper to scuff the nylon tube

bearings on the aileron torque rods so the glue will stick.

❏ 5. Use 30-minute epoxy to simultaneously glue the nylon

bearing tubes in the center TE's and glue the center TE's to
the wing. IMPORTANT: Before gluing, use a tooth pick to
apply a dab of petroleum jelly to the ends of the nylon tubes
to keep the epoxy out.Tape the TE's edges to the wing until
the epoxy cures. Wipe away excess epoxy before it cures
and do not let epoxy get into the nylon bearing tubes.

❏❏6. Position the left aileron on the trailing edge of the

wing, then mark the location of the torque rod. Using a
straightedge, mark the end of the aileron where it meets the
wing tip.

❏❏7. Cut the aileron approximately 1/16" shor ter than

the mark you made at the tip so it will fit in the wing.

❏❏8. Use a draftsman's square to extend the torque rod

marks to the front of the aileron, then use the "centerline
technique" we've shown you before to mark the centerline
on the entire leading edge of the aileron.

❏❏9. Use the centerline and the marks you made earlier

as a guide to drill a 1/8" hole, 3/4" deep in the aileron for the
torque rod.

❏❏10. Refer to the Exper t Tip that follow, then cut a 1/8"

groove in the leading edge of the aileron.

HOW TO CUT A GROOVE FOR AILERON TORQUE ROD

A. Use a #11 knife blade to sharpen the inside end of a

piece of 1/8" brass tube. Roll the tube as you

carve

the
end. If you have a file or a cut-off wheel it helps to sharpen
the outside of the end of the tube as well.

17

B. Use the shar pened tube to

carefully

gouge the leading
edge of the aileron.You'll have to make a few cuts to make
the recess deep enough for the torque rod.

❏❏11. Test fit the aileron to the wing to make sure the

torque rod fits and there is approximately 1/16" clearance
between the aileron and the root of the wing with the
aileron aligned at the tip.Make adjustments if necessary.

❏❏12. Mark the location of the hinges on the aileron and

the wing. Cut the hinge slots.Without using glue, test fit the
aileron to the wing with the hinges.

❏❏13. Remove the aileron from the wing. Mark the

"bevel to" lines and shape the leading edge of the aileron to
a "V" as shown on the plan the same way you did for the
elevator and the rudder.

❏ 14. Perform the same steps to shape the right aileron

and fit it to the wing.

❏ 15. Sand approximately 5/16" into the TE at the

centerline. (The flat will end up approximately 4-3/4" wide).

❏ 16. Use lightweight balsa filler such as HobbyLite to fill

glue joints or dents in the wing. After the filler has fully dried
use your bar sander to sand the wing using progressively
finer grades of sandpaper so it is smooth and all the joints
are blended.

❏ 1. Use 30-minute epoxy to glue the firewall formers

F-1A and F-1B together. Make sure the embossed label on
F-1A is facing UP and the edges and tabs on both formers

are aligned. Wipe away excess epoxy before it cures. From
now on this assembly will be referred to as thefirewall.

Note: If the formers are warped, simply clamping them
together may not "cancel out" the warps. It is best to clamp
the formers to a table or a flat board until the epoxy cures.

❏ 2. Use a straightedge and a ball point pen to draw a line

across the

tab

connecting the notches in the front of only
one of the fuselage sides. Use the line as a guide to
remove the tab with a #11 knife blade. On the inside
surface, label this as the RIGHT fuselage side.

Assemble the Fuse Formers & Sides

BUILD THE FUSELAGE

18

❏ 3. Lay the other fuselage side next to the right side as

shown in the photo and label it on the inside as the LEFT.

It is important that you lay the fuselage sides in a mirrored
position to insure that you build a right and a left half.

❏ 4. Use medium CA to accurately glue a fuselage

doubler to the inside of the right fuselage side. Make sure

the doubler aligns with the fuselage side where the arrows
indicate in the photo.

❏ 5. Glue the left fuselage doubler to the left fuselage side

in the same manner.

❏ 6. Drill a 3/16" hole through each of the punch marks in

formers F-3, F-5 and F-7
Hint: Place the formers on a scrap piece of wood and

press down as you drill the hole so the former does not
split when the drill goes through.

❏ 7. Draw center lines connecting the outer punch marks

on the firewall. Drill 5/32" holes for the engine mount bolts
at the four engine mount punch marks. Drill a 3/16" hole for
the throttle pushrod at the punch mark. Drill two 7/32" holes
for the fuel line.

❏ 8. Press four supplied 6-32 blind nuts into the holes on

the back of the engine mount. Gently tap the blind nuts with
a hammer to fully seat them into the firewall. Add a few
drops of thin CA around the blind nuts to secure them.

❏ 9. Align the F-3 doublers over the die-cut holes in F-3,

and glue them in place using medium CA.

19

❏ 1. Pin the die-cut fuse top in position over the fuselage

bottom view on the plan.Make sure the front of the fuse top
lines up with the firewall on the plan, as this sets the
right thrust.

❏ 2. Pin the die-cut fin plate in place, using the die-cut

stab base to correctly locate it. After you have the fin plate

pinned in position, remove the stab base.

❏ 3. Place formers F3, F5, F7 and F8 in position on the fuse

top.The doublers on F3 face forw ard, to ward the nose.

❏ 4. Fit the left fuse side to the formers and fuse top. Do

not glue.

❏ 5. Fit the right fuse side to the formers and fuse top.

❏ 6. Fit the fuse bottom in place. Note: the landing gear

base does not get installed until after the wing is mounted.

❏ 7. Using a square, check that the fuse sides are

perpendicular to the work bench. Using thin CA, glue each
former to the fuse top, bottom and sides. Double check
every former to make sure it is square.

Note: The interlocking construction this Great Planes kit
allows you to quickly assemble the fuselage upside down
on the plan while maintaining alignment.You will be fitting
most of the die-cut fuselage parts together before
applying glue. Do not use any glue until instructed to

do so.

Assemble the Fuselage

20

21

❏ 8. Glue the fuse sides to the fuse top and bottom with thin

CA.Leave the fuse assembly pinned to your work surf ace.

❏ 9. Fit two of the die-cut 1/8" ply bolt plates in place on

the fuse and mark as shown in the photo.

❏ 10. Using medium CA, laminate the two marked plates

onto the two unmarked plates.

❏ 11. Mark 1/16" down on the TE of each laminated block.

Using your bar sander, sand a taper between the two lines.

❏ 12. Using 6-minute epoxy, securely glue the wing bolt

blocks in place.

❏ 1. Sand the entire wing saddle area lightly until the fuse

side doublers and fuse sides are flush.

❏ 2. Trial fit the wing on the fuse. If the wing is slightly too

large (front to rear) to fit into the saddle, sand the TE of the
wing slightly until it fits.

❏ 3. Center the wing side to side as follows:Stick a T-pin in

F-3 aligned with the center mark. Tie a piece of string
around the T-pin. Pull the string to the wing tip and put a
piece of masking tape on the string at the wing tip. Mark an
arrow on the tape, then slide the tape on the string so the
arrow aligns with the wing tip. Swing the string over to the
other tip and see if it aligns with the other wing tip. If
necessary, shift the wing and mark the location of the tip by
adjusting the position of the tape on the line. Do this until
the arrow on the string aligns with both tips. Measure down
from the bottom of both tip ribs to the flat surface. If the
measurements are not equal (within 1/16"),sand the saddle
until the wing sits level.

❏ 4. While holding the wing firmly in place, drill 1/4" holes

through the front and back dihedral braces as shown.
Remove the wing from the fuse.

Mount the Wing to the Fuselage

❏ 5. Slightly round one end of a 1/4" x 1-1/8" wing dowel.

Using 6-minute Epoxy, glue the dowel in the wing leaving
3/8" protruding from the front of the dihedral brace.

❏ 6. Allow ample time for the epoxy to cure. Then, fit the

wing back onto the fuse, drill the second dowel hole,
remove the wing, and glue the second dowel in place.

Time to use your string again.

❏ 7. Stick the T-pin through the center of the aft end of the

fuselage bottom. Pull the line to the TE of the wing tip and
move your tape to that point. Swing the string over to the
other tip and see if it aligns with the same point. If
necessary shift the wing and mark the location of the tip by
adjusting the position of the tape on the string. Do this until
the arrow on the string aligns with both tips.

❏ 8. Now that the wing is accurately aligned, glue the wing

bolt plate in place on the wing, being careful not to glue the
wing to the fuse.
Note: The punch marks in the wing bolt plate are closer to
the TE of the bolt plate.

❏ 9. Holding the wing firmly in place, drill 13/64" holes

through the punch marks in the bolt plate, drilling through
the wing and the laminated bolt blocks. Try to drill straight
in, perpendicular to the bolt plate. Note: Do not allow the
wing to move while drilling.

❏ 10. Remove the wing and re-drill the holes in the wing

only to 17/64".

❏ 11. Use a 1/4-20 tap and a tap wrench to cut threads in

the laminated bolt blocks in the fuselage.

❏ 12. Harden the threads in the bolt blocks with thin CA,

then re-tap the threads after the glue is completely dry.

We are almost ready to unpin the fuse from the building
board -- just a few more steps.

22

❏ 13. Glue the 1/4" ply landing gear rail in position with

6-minute epoxy.

❏ 14. Glue the landing gear base in place with thin CA.

❏ 15. Center the landing gear between the tabs on the

landing gear base, and drill 13/64" holes through the landing
gear base and rail, making sure the gear does not shift.

❏ 16. Install 8-32 blind nuts supplied with this kit into the

landing gear rail from inside the fuselage. Use the 8/32" x
3/4" socket head cap screws through the landing gear to
pull the blind nuts into position.

❏ 17. Glue F1C in place with thin CA.

Finally. It’s time to un-pin the fuse from your work table.

❏ 18. Double check all of the glue joints. Reinforce with

medium CA as needed.

❏ 19. Install the wing onto the fuse.

❏ 20. Cut the 3/16" x 1-3/4" x 10" balsa stick in half,

making two 5" wing root spacers. Use a playing card or
business card to shim between the spacers and the fuse.
Use medium or thick CA to glue the balsa wing root
spacers to the wing.
Note: It may be necessary to sand the spacers slightly
thinner, or to apply filler to result in a 1/32" gap between the
spacers and the fuse.

23

❏ 21. After the filler has fully dried, remove the wing from

the fuselage. Cut and sand the spacers and the filler to
match the contour of the wing.

❏ 22. Cut a 36" plastic outer pushrod tube in half,

making two 18" lengths. Sand the outside of the tubes with
coarse sandpaper so the glue will stick.

❏ 23. Install the tubes through the guide holes in the

formers. Approximately 1" of the tubes should protrude
outside the slots at the aft end of the fuse.

❏ 24. Glue the tubes into the slots at the end of the

fuselage with microballoons and epoxy. Completely fill the
slot with the microballoons and epoxy so it can be sanded
flush later.Glue the tubes to the formers with medium CA.

❏ 25. After the epoxy has cured, use your bar sander and

150-grit sandpaper to sand the outer pushrod tubes and
epoxy filler flush with the fuselage sides.

❏ 26. Glue the stab base in place with thin CA.

❏ 27. Use 30-minute epoxy to glue the firewall in position.

Use masking tape or clamps to hold the firewall until the
epoxy cures.

❏ 28. From the 3/8" x 3/8" x 12" balsa triangle , cut two

pieces 1-1/4" long. Glue them in place on top of the
laminated wing bolt blocks with 6-minute epoxy.

❏ 29. From the remaining 3/8" x 3/8" balsa triangle, cut

pieces to fit and glue them to the back of the firewall with
6-minute epoxy.

24

❏ 30. Sand the fuselage sides flush with the firewall. Sand

the bottom of the firewall flush with F1C.Sand the bottom of
F1C flush with the landing gear base.

Note:The front and the rear of the front deck use the same
pieces (F-2), but the front F-2 is 90 degrees to the fuse
and the rear F-2 must to be set at an angle using the IP
(instrument panel) gauge.

❏ 1. Using a 90 degree triangle for alignment, glue the

front die-cut 1/8" plywood F2 in place.

❏ 2. Use the IP gauge while gluing the rear die-cut 1/8"

plywood F2 in place.

❏ 3. From the 1/8" x 1/4" x 30" balsa stick, cut an 8" piece

for the front deck main stringer. Glue this stringer into the
notches in both F2's.

❏4.From the 1/8" x 1/8" x 30" balsa stick, cut two 7-1/8" long

gluing stringers. Use a straightedge held on top of both F­2's to position the right gluing stringer. With medium CA,
attach the gluing stringer to the right side of the main stringer.

❏ 5. Glue the left gluing stringer in place on the left side of

the main stringer.

❏ 6. From the same 1/8" square balsa, cut two more

pieces 7-5/8" long. Glue these in place at the bottom
corners of both F-2's on both sides.

❏ 7. Edge glue two 3/32" x 3" x 18" balsa sheets together.

Use your draftsman’s square to mark a centerline, then cut
the two sheets in half, making two 6" x 9" sheets.Cut each
piece so that it measures 9" x 3-1/2" as shown in the photo,
making the front deck sheeting.

Build the Front Fuselage Deck

25

❏ 8. Use medium CA to glue the front deck sheeting to the

main stringer, keeping it down tight against the gluing
stringer.Do not try bending the sheeting yet.

❏ 9. Wet the sheet with the water and alcohol solution, then

carefully test bend it into position. Some tr imming may be
necessary to get a good fit. Apply more water and alcohol if
needed to bend the sheet. Apply medium CA to the formers
and to the bottom gluing stringer, and press the front deck
sheeting in place.Use masking tape to hold it in place.

❏ 10. After the water has evaporated remove the tape. Fit

and glue the other sheet to the fuselage.

❏ 11. Use your bar sander and 150-grit sandpaper to sand

the sides and top of the front deck sheeting so they are
even with the fuse sides. Trim the ends of the sheeting so
they are flush with both F-2's.

❏12.Sand the main stringer so it blends with the sheeting.

❏ 1. If you have not already done so, make sure the stab

and fin are final sanded to a smooth finish, as it will be a little
more difficult to do so after they are glued to the fuselage.

❏ 2. Mount the wing to the fuselage, then position the stab

on the fuselage.Stand about six to ten feet behind the model
and see if the stab is even with the wing. If necessary, use
your bar sander to make adjustments by sanding the stab
base until the stab is in alignment with the wing.

❏ 3. Accurately measure the trailing edge of the stabilizer

and use a ball point pen to lightly mark the center. Use the
same procedure to mark the center of the fin plate where
the trailing edge of the stab will contact it.

Mount the Stabilizer to the Fuselage

26

❏ 4. Place the stab on the stab base with the center marks

aligned, then use a large T-pin to pin only the trailing edge
of the stab to the stab base.

❏ 5. Stick a T-pin through the forward fuse deck sheeting

above F2 in the center of the middle stringer, then use the
"pin and string technique" to accurately align the stab with
the fuselage. Once the stab is accurately aligned, pin the
LE of the stab to the stab base.

❏ 6. Carefully tur n the fuselage over and use a ball point

pen to lightly mar k where both fuselage sides contact the
bottom of the stab.

❏ 7. Remove the stab from the stab base but leave the

T-pins in the stab. Apply a film of 30-minute epoxy to the
stab base and to the stab between the lines you marked
indicating the fuselage sides.

❏ 8. Reposition the stab on the stab base and reinsert the

T-pins into the same holes. Use the string to confirm the
stab alignment. Then, use weights, more T-pins or clamps
to hold the stab in position.Wipe away excess epoxy before
it cures. Recheck alignment. Do not disturb the model until
the epoxy cures.

❏ 1. Glue the die-cut 1/8" ply “backrest”(F4) to the fuse top,

using the “backrest gauge”(BR) to set it at the correct angle.
Note: The gauge is used only for setting the angle (do not

glue the gauge in).

❏ 2. Use a square to position and glue the die-cut 1/8" ply

formers F-6, F-9, and F-10 vertically, at 90 degrees to the
fuse top.

❏ 3. Glue the remaining 1/8" x 1/4" balsa main stringer to

the top of the turtle deck formers. Be sure to keep it
centered on F-4, F-6, F-9 and tight in F-10. After the glue
cures cut the stringer flush with the rear of F-10 and the
front of F-4.

❏ 4. Glue the four 1/8" x 1/8" balsa gluing stringers in

place as you did on the front deck, using a straightedge.

Build the Turtledeck

27

❏ 5. Edge glue three 3/32" x 3" x 18" balsa sheets

together, making a 9" x 18" sheet.

❏ 6. Prepare the two tur tle deck sheets by cutting the

balsa sheet you made in step 5 to the sizes shown in
the sketch.

❏ 7. Glue both turtle deck sheeting pieces to the fuse top

as shown.
Note: The grain runs parallel to the top stringer, NOT the
fuse top.

❏ 8. Wet the outside of the sheeting with your water and

alcohol solution. Wrap the sheeting around the formers and
tape it in place. Let the sheeting dry before trying to fit the
sheeting to the main stringer.

❏ 9. Now that the sheeting has conformed to the turtle

deck shape, trim the top edge so that the sheeting fits tight
against the gluing stringer. Glue the sheeting to the gluing
stringer, main stringer, and formers.

❏ 10. Sand the sheeting flush with the rear of F9 and the

front of F4.

❏ 11. Cut the 5/8" x 1" x 8-7/8" balsa stick into two 4" long

fin fillets. Hold the 1/4" x 1" x 4" balsa dummy fin
centered on and vertical to the fin base. Mar k THE FIN

BASE on both sides with a pen.
Note: It is VERY IMPORTANT that the dummy fin align with

the centerline of the fuse. A good way to check this is to
sight down the dummy fin, aligning it with the main stringer
on the turtle deck.

28

14"

1-1/16"

17"

5-1/4"

❏ 12. Glue one side of the fin fillet to the fuse top and

former F-9. DO NOT GLUE it to the dummy fin. Allow the
glue to dry thoroughly before gluing the other fin fillet
in place.
Note: The dummy fin is only used as a temporary spacer,
so don't glue it in place.

❏ 13. Carve and sand the fin fillets and dummy fin to blend

smoothly with the fuse sides and the turtle deck.
Note: Masking tape around the stab at the root will make it
less prone to nicks while sanding the fillets.

❏ 14. If you have not already done so, final sand the fin.

Remove the dummy fin and put the fin in its place. Before
gluing, double check to make sure the fin aligns with the
fuse centerline. Glue the fin in place with 30-minute epoxy.
Use clamps to hold the fuse sides tight against the fin until
the epoxy has thoroughly cured.

❏ 1. Cut the "spreader bar" from the supplied Great Planes

engine mount, then use a hobby knife to remove any
flashing left over from the molding process so the halves fit
together well.

❏ 2. Temporarily mount the engine mount to the firewall

with four 6-32 x 1" Phillips head machine screws and #6 flat
washers. Do not tighten the screws all the way, because
you still need to adjust the mount.

❏ 3. Place your engine on the mount and slide the halves

in or out until the engine fits properly. Position the mount so
the molded-in "tick marks" are equally spaced on both
sides of the horizontal centerline you drew. When the
engine mount is adjusted and positioned, tighten the
mounting screws.

❏ 4. Position the engine on the mount so the front of the

drive washer (or the back of the spinner) is 4-7/8" away
from the firewall. Mark and drill 7/64" engine mounting
holes for the #6 x 3/4" engine mounting screws. Mount
the engine.

Mount the Engine

29

HOW TO ACCURATELY MARK AND DRILL THE ENGINE

MOUNTING HOLES ON THE ENGINE MOUNT

A. Use C-clamps to hold the engine in position.

B. Heat the end of a shar pened wire rod and mark the center

of the engine mounting holes on the engine mount.It just takes
a little pressure from the heated rod to dimple the plastic.

C. Remove the engine, then use a pin vise or an electric
drill to start the holes with a 1/16" drill bit.

D. Remove the engine mount from the fuselage. Use a drill
press or your hand held electric drill to drill the 7/64" holes.

Optional: Modelers who prefer to mount their engine with
machine screws instead of sheet metal screws should drill
the engine mounting holes with a #36 drill, and tap the
holes with a 6-32 tap. 6-32 x 3/4" screws (not supplied)
are recommended.

❏ 1. Assemble the fuel tank per the manufacturer’s

instructions. Connect approximately 12" of fuel tubing to the
fuel pick-up fitting on the tank and 12" of fuel tubing to the
pressure fitting.

❏ 2. Attach the battery and the tank to the die-cut 1/8" tank

floor (TF) with nylon tape as shown in the photo. Make sure
the embossed labelTF is towards the tank.
Note: If you are using the OS .46 FX engine, the battery
should be installed on the tank mount as shown. If you are
using the OS .70 Surpass, then install the battery on a
left-over piece of 1/8" ply at the location shown on the plan.

❏ 3. Attach the receiver, wrapped in foam, to the 1/8"

die-cut receiver tray (RT) with nylon tape.

❏ 4. Fit the TF in the fuse as shown. The front tab fits in

the slot in the bottom of the firewall and the rear tab fits in
the slot in F-3. Attach the die-cut 1/8 ply tank floor retainer
to F-3 with two #2 x 3/8" sheet metal screws.
Note: This method of mounting the tank makes it easy to
remove the tank and battery. However, after final assembly
it will be necessary to first remove the throttle and elevator
servos to remove the tank.

Install the Battery & Tank

30

31

❏ 5. Install the die-cut 1/8" ply tank hatch with two #2 x

3/8" sheet metal screws.

❏ 1. Use coarse sandpaper to roughen the outside of the

throttle pushrod tube so glue will stick. Use medium CA to
glue the pushrod outer tube into F3 and the firewall.Cut the
pushrod outer tube flush with the outside of the firewall.

❏ 2. Bend and cut the 17-1/2" throttle pushrod wire to fit

your engine installation using the drawing on the fuselage
plan as a guide.Install a nylon clevis and insert the pushrod
through the guide tube. Make adjustments to the bends in
the wire so the pushrod aligns with the carburetor arm on
the engine, then temporarily connect the clevis to the carb
arm. Temporarily mount the muffler and make sure the
throttle pushrod will not interfere with the muffler. Make
adjustments to the bends in the wire if necessary.

❏ 3. Place the throttle servo in the servo tray. Temporarily

install the brass Screw Lock Pushrod Connector into the
throttle servo arm, then adjust the bend in the throttle
pushrod if necessary and fit it into the connector. When
satisfied with the fit of the pushrod, mount the servo to the
servo tray with the screws provided with the radio system.

❏ 4. Cut 11" off one end of one of the 35" wire pushrods.

Cut 13" off the end of the other 35" wire rod. Set the short
pieces aside and save them for the aileron pushrods.
Thread a nylon clevis about 20 turns onto the end of one of
the long rods, then remove the backing plate from a nylon
control horn and connect the clevis to the horn using the
outer hole. Make another pushrod assembly from the other
long rod with a clevis and control horn, in the same manner.

❏ 5. Inser t the pushrods into the pushrod tubes. Position

the control horns on the elevators as shown in the sketch
and on the plan. Use a ballpoint pen to mark the location of
the control horn mounting holes and drill 3/32" holes
through the elevators at the marks. Temporarily mount the
control horns to the elevators with the backing plates and
2-56 x 5/8" screws.

Install the Servos & Make the Pushrods

❏ 6. With the elevator servo set in place, the servo control

horn centered and the control surfaces in their neutral
position, use a felt tip pen to mark where the longer
pushrod crosses the mounting holes in the servo arm.

❏ 7. Disconnect the clevis from the control horn on the

wire you marked. Make a 90 degree bend at the mark you
made. Temporarily install a nylon Faslink™on this pushrod,
then cut the wire so it slightly protrudes out of the Faslink.

Hint: If you prefer to bend and cut the pushrod out of the
fuselage remove the pushrod, make the 90 degree bends

and cut the wire. Unscrew the clevis and reinstall the
pushrod in the guide tube from the front. Screw the clevis
back on.

❏ 8. Slide two 5/32" wheel collars onto the pushrod.

Connect the pushrod to the servo with the Faslink.
Note: If necessary, enlarge the hole in the servo arm with a
hobby knife (or a #48 drill for precision). Let the pushrod
locate the servo in the servo tray. Screw the elevator servo
in place.

❏ 9. While keeping both elevators centered, connect the

two elevator pushrods to each other with the two 5/32"
wheel collars and 6-32 x 1/4" set screws as shown in the
photo. We recommend using thread locking compound on
the set screw threads.

❏ 10. Mount the rudder servo in the fuse as shown. Mount

the 2-56 ball link to the rudder servo arm with the 2-56 nut
provided. The ball link must extend toward the fuse as
shown.Secure the nut with thread locker or thin CA.

❏ 11. Cut 1-1/4" off the unthreaded end of the 6" rudder

pushrod, making a final length of 4-3/4". Screw the nylon
ball link socket fifteen turns onto the rudder pushrod. Snap
the ball link onto the ball on the servo arm. Temporarily
slide the solder clevis onto the rudder control horn and fit it
in place on the rudder with the rudder pushrod inser ted into
the clevis. Center the rudder and the servo horn and mark
the pushrod with a felt tip pen where it enters the clevis.

❏ 12. Remove the solder clevis from the control horn, and

remove the servo arm from the servo with the pushrod
attached. The pushrod must be cleaned (but don't wipe off
your mark) before soldering. Rubbing alcohol works well for
this. Silver solder the clevis to the pushrod using the mark
you made as a reference.

32

❏ 13. Reattach the ser vo arm with the pushrod to the

servo. Mount the control horn the same way as the
elevators with two 2-56 x 5/8" screws.

❏ 14. Mark the location of the tail gear wire on the rudder

and the nylon tail gear bearing on the fuselage.

❏ 15. Remove the rudder and drill a 7/64" hole 5/8" deep

in the leading edge at the mark you made for the tail gear
wire. Cut a groove in the rudder for the nylon tail gear
bearing (use a 5/32" brass tube sharpened at one end to
cut the groove the same way you did for the ailerons). Test
fit the tail gear wire in the rudder.

❏ 16. Cut a slot in the trailing edge of the fuse at the marks

you made for the nylon tail gear bearing. Without using any
glue, join the rudder to the fin with the tail gear wire.

❏ 17. Mount the aileron servo in the wing.Screw the nylon

torque rod connectors on the torque rods until they are
3/4" from the wing.

❏ 18. Use the 11" and 13" wire rods cut from the 35"

pushrods to make the aileron pushrods. Connect the
pushrods the same way you did for the elevator with the
nylon clevises and Faslinks.

❏ 1. Using a leftover 1/4" x 1/2" balsa stick, make the

forward and the aft wing fairings, and glue them in place.
Sand the fairings flush with the sides of the fuse.

Add the Forward & Aft Wing Fairings

33

❏ 2. Mount the wing to the fuse. Using your sanding bar,

shape the fairings to the contour of the wing. Be careful not
to sand into the wing.
Note: It is easier to sand one side of the aft fairing with one
wing bolt removed.When the first side is done, put the wing
bolt back in place and remove the wing bolt on the
unsanded side.

❏❏1. Trim one matching set of wheel pant halves along

the molded in cut lines. Notice that the top of the outer pant
goes over the lip of the inner pant and the bottom of the
inner pant goes over the lip of the outer pant.You can use a
hobby knife to carefully score along the cut lines and flex
the plastic until the excess breaks free, or use small
scissors to cut along the lines. Kyosho curved plastic
cutting scissors (KYOR1010) work extremely well for this
and make the job a cinch. For now, don't worry about
accurately cutting out the opening in each wheel pant
half–just cut an approximate opening for the wheels.

❏❏2. Use your bar sander to carefully true the edges of

the overlapping pieces of the wheel pant halves so when
you glue them together the seam will be as small and
straight as possible. Notice that the front and rear of the
pant halves do not overlap and are "butt glued" together.
Use 150 or 220-grit sandpaper to remove the flashing and
thoroughly roughen all areas that are to be glued including
the indentation on the inside of both inner pant halves.

❏❏3.Test fit the wheel pant halves and make adjustments

where necessary for the best possible fit.

❏❏4. Join two wheel pant halves and carefully spot glue

them together in just a few places with thin CA.Start by spot
gluing the top, then the front and rear where the two halves
just butt together. After the halves are joined, securely glue
them together along all seams with thin CA.
Note: Do not use CA accelerator on the ABS plastic as it
may develop cracks and/or keep the paint from adhering.

❏❏5. Use your hobby knife (or a Moto-Tool with a sanding

drum) to cut out the wheel openings.
Hint: Make the wheel openings wide as this will make
installing the wheels and axles easier and cause less
interference with the wheels upon landing and takeoff. You
can see the size of the wheel openings in the following photo.

❏❏6. Use medium CA to glue the die-cut 1/8" plywood

wheel pant mounts to the inside of each wheel pant.

❏❏7. Use a metal file to chamfer the edges and corners

of the aluminum landing gear so it will neatly fit in the
recess of the wheel pant. Position the wheel pant on the
aluminum landing gear, then use a felt tip pen to accurately
mark the location of the axle mounting hole.

Assemble the Wheel Pants

34

❏❏8. Dr ill a 3/16" (11/64" or #18 for precision) hole in

the wheel pant at the mark. Back up the wheel pant mount
with a piece of scrap wood so you do not split it as the drill
goes through.

❏❏9. Most 2-1/2" wheels are made to fit 5/32" axles, but

the 8-32 screws supplied in this kit for the axles require a
larger hole. If the wheel does not roll freely on the
8-32 x 1-1/2" SHCS "axle," enlarge the wheel hub with an
11/64" (#18 for perfection) drill.

❏❏10. Test fit the wheel in the wheel pant using the

following procedure:

A. Install an axle in a wheel.Thread an 8-32 nut about 1/8"
onto the axle.

B. Insert the wheel in the pant with the end of the screw
inserted in the plywood wheel pant mount and the head of
the screw sticking out of the wheel pant.

Note: When you reinstall the wheel after the wheel pant
has been painted, put masking tape on the bottom of the
pant so the screw will not scratch it.

C. Use a 9/64" hex wrench to screw the axle through the
wheel and the wheel pant until the wheel goes all the way
in and the axle goes through the pant mount.

D. Adjust the tightness of the nut with hemostats or needle
nose pliers.

❏❏11. Temporarily mount the wheel pant to the landing

gear with another 8-32 nut on the axle.

❏ 12. Perform the same procedure to assemble and

temporarily mount the other wheel pant to the landing gear.

❏ 13. Before painting the wheel pants, fill the seams with

putty filler such as Squadron White Putty or resin filler such
as Bondo.®We use Bondo most of the time as it cures
quickly and is easy to sand, but usually it must be
purchased in large quantities. Squadron putty works well
but it takes overnight to dry and usually requires at least
two applications because it shrinks as it dries.

❏ 14. After the filler cures, wet sand the wheel pants with

400-grit sandpaper to prepare them for primer.

35

❏ 1. The cowl is assembled in a manner similar to the

wheel pants. Cut the cowl along the cut lines, then use your
bar sander to true all the edges. For now, the opening in the
front cowl piece only needs to be roughly cut out. Use
coarse sandpaper to roughen all the overlapping areas so
the glue will stick.

❏ 2. Tape the three pieces together, then wick a small

amount of thin CA along the seams of the overlapping
joints. After the CA has cured, remove the tape and make
sure you have thoroughly glued the two pieces together by
inspecting the glue joints and adding thin CA if necessary.

❏ 3. Use a sharp hobby knife (or a Moto-Tool with a sanding

drum) to accurately cut the air openings at the front of the
cowl and the air exit at the bottom rear of the cowl.

❏ 4. Use 30-minute epoxy to glue a 1" strip of fiberglass

cloth across the glue joint inside the front of the cowl.

❏ 5. Fit the cowl over the engine, then mount the spinner

backplate on the engine. Align the cowl so there is
approximately a 1/8" gap between the backplate of the
spinner and the cowl.T ape the cowl to the fuse.

❏ 6. Making one hole at a time and checking to be sure the

cowl still lines up with the spinner back plate, drill one 3/32"
hole through the cowl and the fuse side at one of the locations
shown on the plan. Using a #4 x 1/2" screw attach the cowl to
the fuse. Do the same for the other three cowl mounting
screws, checking alignment bef ore drilling each one.

❏ 7. Remove the spinner backplate and the cowl from the

fuselage. Use a drop of thin CA to harden the screw holes
in the fuse.

❏ 8. Use thin cardboard or plastic to make templates for

the cutouts in the cowl for the glow plug driver and the
needle valve. Tape the templates to the fuselage behind
where the cowl will mount to the fuse, accurately indicating
the position of the glow plug and needle valve.

Assemble the Cowl

36

❏ 9. Remount the cowl, leaving the templates you made

attached to the fuse. Mark the holes for the needle valve
and the glow plug driver on the cowl. Remove the cowl and
cut the holes for the needle valve and glow plug driver.

❏ 10. Cut four 1" x 1" pieces of fiberglass cloth. Use

30-minute epoxy to glue one piece to the inside of the cowl
at each cowl mounting hole. After the epoxy cures, re-drill
the holes with a 1/8" drill bit.

❏ 11. Fill the seams and other imperfections in the cowl as

described in the preceding Wheel Pants section. Wet sand
the entire cowl with 400-grit sandpaper to prepare it
for priming.

❏ 1. Disconnect and remove all the pushrods and remove

the hinges and control horns from the ailerons, elevators,
and rudder. Remove the engine mount and any other
hardware you may have installed.

❏ 2. Most of the model should be rough-sanded by now

with all the tabs and rough edges sanded even. Fill all
dents, seams, low spots, and notches with HobbyLite Balsa
Colored Filler.

❏ 3. After the filler has dried, use progressively finer grades

of sandpaper to even all the edges and seams and smooth
all surfaces. Remove all balsa dust from the model with
compressed air or a vacuum with a brush and a tack cloth.

Cover the model with Top Flite MonoKote®Film using the
recommended covering sequence that follows. Before you
cover the fuselage, first apply 1/4" wide strips of MonoKote
film in the corners between the stab and fuse and the fin and

the fuse, then proceed to cover the fin and stab with pre-cut
pieces that meet in the corners and overlap the 1/4" strips.

Never cut the covering on the stab and fin after it has
been applied except around the leading and trailing
edges and at the tips. Modelers who do this may cut

through the covering and into the stab or fin. This will
weaken the structure to a point where it may f ail during flight.

Since the tips of the elevators and stab are squared off it is
easiest to cover the tips before you cover the tops and
bottoms.Do the same for the fin, rudder and the wing.

Some modelers drill a small hole in each elevator rib and
the trailing edge of the elevators to allow expanded gas to
exit while heating the MonoKote film. This keeps the
covering from "ballooning" and allows you to securely bond
it to the entire elevator. The same thing can be done with
the fin and rudder.

Since the ailerons are long "strip" ailerons, some modelers
prefer to cover the top and bottom with one strip of
MonoKote film by covering the bottom first, then wrapping it
around the leading edge and over the top.

Fuselage

1. 1/4" strips at fin and stab as described

2. Aft fuse bottom

3. Forward fuse bottom

4. Fuse right side up to the top center of the turtledeck

5. Fuse left side up to the center of the turtledeck,
overlapping by 1/8"

6. Forward fuse deck top

7. Fin tip, then stab tips

8. Stab bottom, then top

9. Fin right side, then left side

10. Elevator tips and root ends

11. Elevator bottoms, then tops

12. Rudder tip, right side, then left side

13. Cockpit - A light color is recommended for this so the
heat build up under the canopy is kept to a minimum.

Wing

1. Wing root spacers

2. Wing tips

3. Trailing edges of wing and inboard portion of tips and
center leading edges

4. Bottom of right, then left panel

5. Top of right, then left panel

6. Aileron tips, bottom, then top

Suggested Covering Sequence

Covering T echnique

COVER THE MODEL WITH

MONOKOTE FILM

Prepare the Model for Covering

37

Do not confuse this procedure with "checking the
C.G." which will be discussed later in the manual.

Now that the model is covered and nearly competed, this is
the time to balance it laterally (side-to-side).Here's how:

❏ 1. With the wing level and attached to the model (and

the engine and muffler installed), lift the model by the
propeller shaft and the fin. This may require an assistant.
Do this several times.

❏ 2. The wing that consistently drops indicates the heavy

side. Balance the model by adding weight to the other
wing tip.

An airplane that is laterally balanced will track better during
aerobatic maneuvers.

After the model is covered, use fuelproof model paint,
30-minute epoxy thinned with alcohol or finishing resin to
coat areas that may be exposed to raw fuel or exhaust
residue. These are areas such as the firewall, front and
back of the fuse openings for the wing and wing saddle
doubler, fuel compartment hatch and the fuse top forward
of the sheeting.

Top Flite LustreKote™fuel-proof paint is recommended for
painting all the ABS plastic parts and the aluminum landing
gear. The wheel pants should be removed from the landing
gear for painting. Use a file to round the corners of the
aluminum landing gear before you paint it. At least one coat
of LustreKote primer is highly recommended to fill all the
small scratches left from sanding as well as small pin holes
in the Bondo filler. Wet sand between coats with 400-grit
sandpaper and apply a second coat of primer if necessary.

Before painting the canopy, use scissors or a hobby knife to
trim it along the molded-in cut lines, then true the edges
with your bar sander and 220-grit sandpaper. Use 400-gr it
sandpaper to scuff the frame portion of the canopy so the
paint will stick.We recommend you paint the canopy frame
with Pactra Formula-U or Chevron Perfect Paint. Use
masking tape to cover the portion of the canopy that is not
to be painted. If you are not sure that the paint is
compatible with the clear canopy, test the paint on a scrap
piece of canopy material.

For painting the pilot, we have discovered that acrylic water
base paints such as the types found at craft stores work
great. The acrylic paints look realistic on the pilot because
they are not glossy, and best of all, they clean up with water.

❏ 1. Start with the elevators and stab. Cut the covering

from the hinge slots–don't just

slit

the covering but remove

a small strip the size of the hinge slot.

❏ 2. Drill a 3/32" hole 1/2" deep in the center of each hinge

slot. A high speed moto-tool works best for this. If you use a
regular drill, clean out the hinge slots with your #11 blade.

❏ 3. Clean the aileron torque rod arms and the tail gear wire

with rubbing alcohol to remove residue that may keep the
glue from sticking. Use coarse sandpaper to scuff the tail
gear wire and the aileron torque rods so the glue will stick.

❏ 4. Without using any glue, fit the hinges in the elevators

or stab. Do not glue the hinges yet. As you join the
elevators to the stab, confirm that the hinges are equally
inserted in the elevators and the stab. Insert a small pin in
the center of the hinges to keep them centered.

Join the Control Surfaces

FINAL HOOKUPS & CHECKS

PAINTING

BALANCE THE MODEL LATERALLY

38

CUT THE COVERING

AWAY FROM THE SLOT

DRILL A 3/32" HOLE

1/2" DEEP, IN CENTER

OF HINGE SLOT

TEMPORARY PIN

TO KEEP HINGE

CENTERED

❏ 5. Remove the pin and add 6 drops of thin CA to the

center of all the hinges on both the top and the bottom.

Do not use accelerator on any of the hinges. Do not glue
the hinges with anything but thin CA and do not attempt
to glue one half of the hinge at a time with medium or
thick CA. They will not be properly secured and the
controls could separate while the model is in flight.

❏ 6. Join the rudder to the fin with the hinges and use

30-minute epoxy to simultaneously glue the tail gear wire in
the rudder and the tail gear bearing in the fuse. Do not
glue the nylon bearing to the rudder. Glue the hinges in
position with thin CA.
Hint: Applying a little petroleum jelly to the tail gear wire
where it passes through the nylon bearing will prevent the
wire from being glued into the bearing.

❏ 7. Prepare the hinge slots in the ailerons the same way

you did for the tail surfaces.

❏ 8. Use a toothpick to pack the torque rod holes in the

ailerons with 30-minute epoxy, then join the ailerons to the
wing with the hinges. Glue the hinges with thin CA. Wipe
away the epoxy that is squeezed out of the ailerons with a
paper towel and alcohol.

❏ 1. Install a 1" tail wheel with two 3/32" wheel collars.
❏ 2. Install the wheels in the wheel pants (don't forget the

masking tape so the screw doesn't scratch the paint), then
mount the wheel pants to the landing gear.Secure the 8-32
nuts with a drop of thread lock.

❏ 3. Mount the landing gear to the fuselage with the

8-32 x 3/4" socket head cap screws and #8 washers.

❏ 4. Install the elevator, rudder and throttle pushrods and

servos. Install the control hor ns and hook them up the
same way you did earlier.

❏ 5. Using four #2 x 3/8 screws, mount the receiver tray to

the fuse with the receiver still attached.

❏ 6. Mount the receiver switch in a convenient location that

will not interfere with the servos and pushrods inside the
fuselage.

❏ 7. Route the receiver antenna. On our prototype we drilled

a small hole in the bottom of the fuse aft of the wing bolt
plate and inserted a piece of tubing to route the antenna
through (fuel tubing or neoprene retractable landing gear air
tubing works well). Make a strain relief from a cut-off servo
arm and place it on the antenna near the receiver as shown
on the plan. Route the antenna through the tubing. Make a
hook out of another cut-off servo arm and loop the end of the
antenna to it. Connect the servo arm hook to a rubber band
and loop it around the tail gear wire.

❏ 8. Some modelers prefer to cushion the wing with wing

seating foam tape on the wing saddle of the fuselage.Apply
1/16" seating tape on the wing saddle of the fuselage if
you choose.

❏ 9. Prepare the engine compartment for installing the

cowl by connecting the fuel lines, installing the fueling
valve, mounting the muffler, and connecting the throttle
pushrod. Install the cowl, then mount the spinner backplate,
prop, prop washer, and prop nut.Install the spinner.

❏ 1. Place the canopy on the fuselage at the location

shown on the plan. Temporarily hold it in position with tape
or rubber bands.

❏ 2. Use a felt tip pen to accurately trace the canopy outline

onto the MonoKote film cov ering.Remove the canopy.

Attach the Canopy

Install the Hardware

ASSEMBLE, THEN APPLY 6 DROPS

39

OF THIN CA TO CENTER

OF HINGE, ON BOTH SIDES

THE CA WICKS

ALONG THE "TUNNELS"

TO THE ENTIRE

HINGE SURFACE

❏ 3. Use a shar p #11 blade to

carefully

cut the covering
about 1/32" inside of the line you marked without cutting
into the balsa. Wipe away the ink line with a paper towel
lightly dampened with rubbing alcohol.

❏ 4. Before you permanently glue the canopy to the

fuselage, securely glue your pilot in place. For the most
security, screw the base of the pilot to the cockpit floor with
two #4 or #6 sheet metal screws from the underside of the
cockpit floor. Place the instr ument panel decal on the
instrument panel.

❏ 5. Reposition the canopy on the fuselage and confirm

that it covers the exposed wood. Glue the canopy to the
fuselage using rubber bands or masking tape to hold it in
position until the glue dries. We recommend a glue
specifically formulated for gluing on canopies, such as
Pacer "Formula 560" canopy glue. Formula 560 is like
regular white glue (aliphatic resin) in that it dries clear and
cleans-up with water, but it sticks extremely well to butyrate
and dries overnight (to allow for accurate positioning).

NOTE:The balance and control throws for the CAP 232
have been extensively tested. We are confident that
they represent the settings at which the CAP 232 flies
best. Please set up your model to the specifications
listed above. If, after you become comfortable with
your CAP 232, you would like to adjust the throws to
suit your tastes, that's fine. Too much throw can force
the plane into a stall or snap, so remember, "more is
not better." Trust the low rates.

NOTE: This section is VERY important and must NOT
be omitted! A model that is not properly balanced will
be unstable and possibly unflyable.

❏ 1. Accurately mark the balance point on the top of the

wing on both sides of the fuselage.Use thin strips of tape

Balance the Model

We recommend the following control surface throws:
NOTE: The throws are measured at the widest part of

the elevators, rudder, and ailerons. Adjust the position of
the pushrods at the control/servo horns to control the
amount of throw. You may also use the ATV's if your
transmitter has them but the mechanical linkages should
still be set so the ATV's are near 100% for the best servo
resolution (smoothest, most proportional movement).

High Rate Low Rate

ELEVATOR: 1" up 5/8" up

1" down 5/8" down

RUDDER: 3" right 1-3/4" right

3" left 1-3/4" left

AILERONS: 3/8" up 1/4" up

3/8" down 1/4" down

NOTE: If your radio does not have dual rates, then set
the control surfaces to move at the low rate throws.

Set the Control Throws

40

4-CHANNEL RADIO SETUP

(STANDARD MODE 2)

ELEVATOR MOVES UP

4-CHANNEL

TRANSMITTER

RIGHT AILERON MOVES UP
LEFT AILERON MOVES DOWN

4-CHANNEL

TRANSMITTER

RUDDER MOVES RIGHT

4-CHANNEL

TRANSMITTER

CARBURETOR WIDE OPEN

4-CHANNEL

TRANSMITTER

3-3/4"

41

or a felt tip pen to make the marks.The balance point (CG)
is located 3-3/4" back from the leading edge as shown in
the sketch and on the fuselage plan.
Hint: Reference the full size fuse plan to help you locate
the proper balance point. This is the balance point at which
your model should balance for your first flights. After initial
trim flights and when you become more acquainted with
your CAP 232, you may wish to experiment by shifting the
balance up to 1/4" forward or back to change the flying
characteristics. Moving the balance forward may improve
the smoothness and stability, but the model may then
require more speed for takeoff and it may be more difficult
to slow for landing. Moving the balance aft makes the
model more agile with a lighter, snappier "feel" and often
improves knife-edge capabilities. In any case, please start

at the location we recommend and do not at any time
balance your model outside the recommended range.

Hint: The Great Planes CG Machine™makes this process

much easier and more accurate.

❏ 2. With the wing attached to the fuselage, all parts of the

model installed (ready to fly) and an empty fuel tank, hold
the model upside-down with the stabilizer level.

❏ 3. Lift the model at the balance point. If the tail drops

when you lift, the model is "tail heavy" and you must add
weight* to the nose to balance the model. If the nose
drops, it is "nose heavy" and you must add weight* to the
tail to balance the model.
NOTE: Nose weight may be easily installed by using a
"spinner weight" or gluing lead weights to the firewall. Tail
weight may be added by using Great Planes (GPMQ4485)
"stick-on" lead weights. Later, if the balance is OKAY, you
can open the fuse bottom and glue the weights
in permanently.

*

If possible, first attempt to balance the model by changing
the position of the receiver battery and receiver. If you are
unable to obtain good balance by doing so, then it will be
necessary to add weight to the nose or tail to achieve the
proper balance point.

Follow the battery charging procedures in your radio instruction
manual. You should always charge your transmitter and
receiver batteries the night before you go flying, and at other
times as recommended by the radio manuf acturer .

Balance your propellers carefully before flying. An
unbalanced prop is the single most significant cause of
vibration. Not only may engine mounting screws vibrate
out, possibly with disastrous effect, but vibration may also
damage your radio receiver and battery. Vibration may
cause your fuel to foam, which will, in turn, cause your
engine to run lean or quit.

We use a Top Flite Precision Magnetic Prop Balancer

™

(TOPQ5700) in the workshop and keep a Great Planes
Fingertip Balancer (GPMQ5000) in our flight box.

Since you have chosen the CAP 232 we assume that you
are an experienced modeler.Therefore, you should already
know about AMA chartered flying fields and other safe
places to fly. If, for some reason you are a relatively
inexperienced modeler, and have not been informed, we
strongly suggest that the best place to fly is an AMA
chartered club field. Ask the AMA or your local hobby
dealer if there is a club in your area and join.Club fields are
set up for R/C flying and that makes your outing safer and
more enjoyable. The AMA address and telephone number
are in the front of this manual.

If a club and flying site are not available, find a large, grassy
area at least 6 miles away from houses, buildings and
streets and any other R/C radio operation like R/C boats and
R/C cars. A schoolyard may look inviting but is too close to
people, power lines and possible r adio interference.

If you are not thoroughly familiar with the operation of R/C
models, ask an experienced modeler to inspect your radio
installation and confirm that all the control surfaces
respond correctly to transmitter inputs. The engine
operation must also be checked by confirming that the
engine idles reliably and transitions smoothly and rapidly to

Ground Check the Model

Find a Safe Place to Fly

Balance the Propeller

Charge the Batteries

At this time, check all connections including servo arm
screws, Faslinks, clevises and servo wires. Make sure
you have installed the nylon retainer on the screw-lock
pushrod connector on the throttle pushrod at the servo
arm, and the silicone retainers on all the clevises.

PREFLIGHT

full power, and maintains full power indefinitely. The engine
must be "broken-in" on the ground by running it for at least
two tanks of fuel. Follow the engine manufacturer's
recommendations for break-in. Make sure all screws
remain tight, that the hinges are secure and that the prop is
on tight.

Whenever you go to the flying field, check the operational
range of the radio before the first flight of the day. First,
make sure no one else is on your frequency (channel).With
your transmitter antenna collapsed and the receiver and
transmitter on, you should be able to walk at least 100 feet
away from the model and still have control.While you work
the controls have a helper stand by your model and tell you
what the control surfaces are doing.

Repeat this test with the engine running at various speeds
with a helper holding the model. If the control surfaces are
not always responding correctly, do not fly! Find and correct
the problem first. Look for loose servo connections or
corrosion, loose bolts that may cause vibration, a defective
on/off switch, low battery voltage or a defective cell, a
damaged receiver antenna, or a receiver crystal that may
have been damaged from a pre vious cr ash.

NOTE: Failure to follow these safety precautions may
result in severe injury to yourself and others.

Keep all engine fuel in a safe place, away from high heat,
sparks or flames as fuel is very flammable. Do not smoke
near the engine or fuel; and remember that the engine
exhaust gives off a great deal of deadly carbon monoxide.
Do not run the engine in a closed room or garage.

Get help from an experienced pilot when learning to
operate engines.

Use safety glasses when starting or running engines.
Do not run the engine in an area of loose gravel or sand;

the propeller may throw such material in your face or eyes.
Keep your face and body as well as all spectators away

from the plane of rotation of the propeller as you start and
run the engine.

Keep these items away from the prop: loose clothing, shirt
sleeves, ties, scarfs, long hair or loose objects such as
pencils, screw drivers that may fall out of shirt or jacket
pockets into the prop.

Use a "chicken stick" or electric starter; follow instructions
supplied with the starter or stick. Make certain the glow
plug clip or connector is secure so that it will not pop off or
otherwise get into the running propeller.

Make all engine adjustments from behind the rotating
propeller.

The engine gets hot! Do not touch it during or after
operation. Make sure fuel lines are in good condition so
fuel will not leak onto a hot engine causing a fire.

To stop the engine, cut off the fuel supply by closing off
the fuel line or follow the engine manufacturer's
recommendations. Do not use hands, fingers or any body
part to try to stop the engine.Do not throw anything into the
prop of a running engine.

Read and abide by the following Academy of Model
Aeronautics Official Safety Code:

General

1. I will not fly my model aircraft in sanctioned events, air

shows, or model flying demonstrations until it has been
proven to be airworthy by having been previously
successfully flight tested.

2. I will not fly my model aircraft higher than approximately
400 feet within 3 miles of an airport without notifying the
airpor t operator. I will give right of way to, and avoid flying
in the proximity of, full scale aircraft. Where necessary an
observer shall be used to supervise flying to avoid having
models fly in the proximity of full scale aircraft.

3.Where established, I will abide by the safety rules for the
flying site I use, and I will not willfully and deliberately fly
my models in a careless, reckless and/or dangerous
manner.

7. I will not fly my model unless it is identified with my name
and address or AMA number, on or in the model.

9. I will not operate models with pyrotechnics (any device
that explodes, burns, or propels a projectile of any kind)

Radio control

1. I will have completed a successful radio equipment

ground check before the first flight of a new or repaired
model.

2. I will not fly my model aircraft in the presence of
spectators until I become a qualified flier, unless assisted
by an experienced helper.

AMA Safety Code (excerpt)

Engine Safety Precautions

Range Check the Radio

42

3. I will perform my initial turn after takeoff away from the pit

or spectator areas, and I will not thereafter fly over pit or
spectator areas, unless beyond my control.

4. I will operate my model using only radio
control frequencies currently allowed by the Federal
Communications Commission.

The Great Planes CAP 232 is a great flying semi-scale
sport model that flies smoothly and predictably, yet is highly
aerobatic. Compared to other spor t planes its flight
characteristics are docile and forgiving.The CAP does not,
however, possess the self-recovery characteristics of a
primary R/C trainer; therefore, you must either have
mastered the basics of R/C flying or obtained the
assistance of a competent R/C pilot to assist you with the
first flights of your CAP 232.

Take off on "low" rates if you have dual rates on your
transmitter. For all models it is good practice to gain as
much speed as the length of the runway will permit before
lifting off. This will give you a safety margin in case the
engine quits.When you initially advance the throttle and the
tail begins to lift, the CAP will begin to turn to the left
slightly (due to the torque of the engine–a characteristic of
all taildraggers). Be prepared for this by applying sufficient
right rudder to keep the CAP running straight down the
middle of the runway (or flying field). The left turning

tendency will decrease as the plane picks up speed. Be
sure to allow the tail to rise off the ground before lifting the
model into the air.Depending on the surface you are taking
off from, you will need to apply little or no up elevator until
flying speed is reached. Don't hold the tail on the ground
with too much up elevator, as the CAP will become
airborne prematurely and may stall. When the plane has
gained enough flying speed to safely lift off, gradually and
smoothly apply up elevator and allow the model to climb at
a shallow angle (do not yank the model off the ground into
a steep climb!).

We recommend that you take it easy with your CAP 232 for
the first several flights, gradually "getting acquainted" with
this great sport model as your engine gets fully broken in. If
you feel as though you have your hands full, keep this one
thing in mind: pull back on the throttle stick to slow the
model down. This will make everything happen a little
slower and allow you time to think and react. Add and
practice one maneuver at a time, learning how the
CAP behaves in each. For smooth flying and normal
maneuvers, use the low rate settings as listed on page 40.
For good knife-edge performance forward fight speed is the
key. Snaps are best performed on low rate, as the high rate
tends to push the CAP too deep into the stall slowing the
exit of the snap.

Sometime well before it's time to land you should climb
your CAP to a safe altitude and cut the throttle to an idle to
check out the model’s slow speed characteristics. Do this a
few times so you know what to expect upon landing.

When it's time to land, fly a normal landing pattern and
approach. Keep a few clicks of power on until you are over
the runway threshold.For your first few landings, plan to land
slightly faster than stall speed and on the main wheels, as
this is the easiest way to land your CAP. Later, with a little
practice, you will find you can make slow 3-point landings.

Have a ball! But always remember to think about your
next move and plan each maneuver before you do it.
Impulsively "jamming the sticks" without any thought
is what gets most fliers in trouble rather than lack of
flying skill.

Landing

Flight

Takeoff

CAUTION (THIS APPLIES TO ALL

R/C AIRPLANES): If,
while flying, you notice any unusual sounds, such as a
low-pitched "buzz", this may indicate control surface
"flutter". Because flutter can quickly destroy components
of your airplane, any time you detect flutter you must
immediately cut the throttle and land the airplane!
Check all servo grommets for deterioration (this may
indicate which surface fluttered), and make sure all
pushrod linkages are slop-free. If it fluttered once, it will
probably flutter again under similar circumstances unless
you can eliminate the slop or flexing in the linkages.Here
are some things which can result in flutter: Excessive
hinge gap; Not mounting control horns solidly; Sloppy fit
of clevis pin in horn; Elasticity present in flexible plastic
pushrods; Side-play of pushrod in guide tube caused by
tight bends; Sloppy fit of Z-bend in servo arm; Insufficient
glue used when gluing in the elevator joiner wire or
aileron torque rod; Excessive flexing of aileron, caused
by using too soft balsa; Excessive "play" or "backlash" in
servo gears; and Insecure servo mounting.

FLYING

43

2-VIEW DRAWING

Use this layout for trim scheme planning only. Not suitable for scale documentation.