Great Planes GPMA0177 User Manual

Instruction 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.

CRS4P03

11/95

V.1

3005058

PO Box 788 Urbana, Illinois 61801 [phone]

Entire Contents © Copyright 1995

Precautions

....................................................3

Introduction....................................................3

Decisions you must make.............................3

Engine selection.........................................3

Other items required...................................3

Suggested supplies and tools ....................4

Common abbreviations...............................4

Metric conversions .....................................5

Types of wood ............................................5

Get ready to

build.......................................5

Balance your model..................................37

Preflight....................................................38

AMA safety code ......................................38

Flying your model ........................................39

Two-view drawing ..........................Back Cover

Die-cut

patterns..............................................6

Build the tail surfaces....................................7

Build the stabilizer and fin ..........................7

Build the elevators and rudder....................7

Join the elevators .......................................7

Finishing the tail surfaces...........................8

Build the wing ................................................8

Build the wing center section......................8

Sheet the top of the center section...........10

Sheet the bottom of the center section..... 12

Trailing edge installation...........................13

Build the outer wing panels ......................14

Sheet the bottom LE and TE ....................15

Sheet the top LE and TE ..........................16

Join the wing panels.................................17

Install the aileron linkage..........................17

Build The Fuselage ......................................20

Assemble the fuse sides ..........................20

Install pushrod tubes ................................21

Build the tail gear......................................21

Install the firewall......................................22

Install the engine and tank .......................23

Complete the fuse top ..............................25

Mount the wing to the fuselage ................27

Attach the stabilizer blocks.......................27

Install the stab and fin ..............................29

Build the wing belly fairing........................30

Install the cowl..........................................31

Finishing.......................................................32

Final sanding............................................32

Fuelproofing .............................................32

Balance the airplane laterally ...................32

Cover the structure with MonoKote film....33

Recommended covering sequence..........33

Painting the cowling..................................33

Your F4U Corsair is not a toy, but rather a sophisticated,
working model that functions very much like an
actual airplane.

Because of its realistic performance, the Corsair, if not
assembled and operated correctly, could possibly cause
injury to yourself or spectators and damage property.

To make your R/C modeling experience totally
enjoyable, we recommend that you get experienced,
knowledgeable help with assembly and during 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 can also contact the national Academy of Model
Aeronautics (AMA), which has more than 2,300 chartered
clubs across the country. Through any one of them,
instructor training programs and insured newcomer training
are available.

Contact AMA at the address or toll-free phone number below:

Academy of Model Aeronautics

5151 East Memorial Drive
Muncie, IN 47302-9252

[phone]

Final Hookups And Checks.........................34

Install the control surfaces........................34

Install the landing gear and canopy..........35

Radio installation ......................................35

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

2 You must take time to build straight, true and strong.

3 You must properly install all R/C and other components
so that the model operates properly on the ground and in
the air

4. You must test the operation of the model before the first
and each successive flight to insure that all equipment is
operating, and you must make certain that the model has
remained structurally sound

The Great Planes F4U Corsair .40 has been designed
to be built flat on the board. It is a super-flying model with
no bad traits Anyone who has had a little taildragger time
will not experience any difficulty with ground handling or
flying With a hot 40 or .46, the Great Planes Corsair will
do all the tricks in the book, and at a very exciting pace

Install a non-Schnuerled engine and enjoy a more relaxed
flying experience - but one that still allows most common
flight maneuvers

The Corsair .40 is equally at home on a paved runway
or operating from a grass strip The construction is tough
and there are no retracts to worry about, so rough fields
can be handled with confidence The thick, high-lift airfoil
with built-in washout allows the model to slow down for
smooth landings without the need for flaps

To fully enclose the engine within the Corsair's cowl, we
suggest using a 2-stroke engine with a Pitts-style muffler
There is plenty of room to install up to a 70 4-stroke if you
choose However, the top of the cylinder head and exhaust
pipe/muffler will protrude through the cowling

We hope you enjoy your Great Planes F4U Corsair .40
as much as we do It's a blast to fly!

Remember: Take your time and follow directions to

end up with a well-built model that is straight and true.

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
model, please give us a call at [phone] and we'll be
glad to help.

Thank you for purchasing the Great Planes F4U
Corsair 40 to build as your next project' This kit has been
engineered using state-of-the-art Computer Aided Design
technology to provide the best parts fit and interlocking
construction available The result is a kit that builds easily
and flies great.

D Four-channel radio with four servos
D Propeller (Top Flite® Power Point")
D 10 oz Fuel tank (GPMQ4104)
D Medium fuel tubing (12") (GPMQ4131)
D 2-3/4" Main wheels (2) (GPMQ4224)
D 1" Tail wheel (1) (GPMQ4241)
D 5/32" Wheel collars (4) (GPMQ4306)

D 3/32" Wheel collars (2) (GPMQ4302)

D Aluminum spinner nut (GPMQ4630 - 1/4")

(GPMQ4631 -5/16")

D Covering film (2) rolls (Top Flite® MonoKote*)

3

D 2-1/2" Pilot figure (Williams Bros #176)*
D 1/4" Latex Foam Rubber Padding (HCAQ1000)
D Easy Fueler" fuel filling valve (GPMQ4160)*
D Switch and Charge Jack (GPMM1000)*
D Paint for cowl (Top Flite®LustreKote" paint)
D Engine 40 - 46 2-stroke

48- 70 4-stroke

*These items are suggested optional items to dress up your

Corsair 40

We recommended Great Planes Pro" CA and Epoxy

D 2 oz Pro CA (thin GPMR6003)
D 2 oz Pro CA+ (medium GPMR6009)
D 1 oz Pro CA-(thick GPMR6014)
D 6-Minute Pro Epoxy (GPMR6045)
D 30-Minute Pro Epoxy (GPMR6047)
D 4oz Pro Wood Glue (GPMR6161)
D Hand or electric drill
D Sealing iron (TOPR2100)
D Hotsock(TOPR2175)
D Heat gun (TOPR2000)
D Hobby saw (X-Acto" razor saw)
D Hobby knife, #11 Blades
D Razor plane (Master Airscrew*)
D Pliers
D Screw drivers (Phillips and flat tip)
D Round file (or similar)
D T-pins (HCAQ5150)
D String
D Straightedge with scale
D Masking tape (required for construction)
D Sandpaper (coarse medium, fine grit)*
D Easy-Touch Bar Sander (or similar)
D Waxed paper
D Lightweight balsa filler such as Hobbico* HobbyLite"

(Hobbico #HCAR3400)

D 1/4-20 Tap and tap wrench
D IsopropyI rubbing alcohol (70%)
D Auto body filler (Bondo* or similar)

On our workbench, we have three 11" Great Planes
Easy-Touch Bar Sanders equipped with #80, #150 and

#220-gnt sandpaper This setup is all that is required for
almost any sanding task Custom sanding blocks can be
made from balsa for sanding hard to reach spots We also
keep some #320-gnt wet-or-dry sandpaper handy for finish
sanding before covering

Great Planes Easy-Touch Bar Sanders are made from
lightweight extruded aluminum and can be found at most
hobby shops They are available in two sizes - 11"
(GPMR6170) for most general purpose sanding and 22"
(GPMR6172) for long surfaces such as wing leading edges
We recommend using the 2" wide self-adhesive sandpaper
sold in 12" rolls by Great Planes Standard sandpaper can
be attached by gluing it to the sander with brush-on rubber
cement Apply the rubber cement to both the bottom of the
sander and the back of the sandpaper When both surfaces
are dry to the touch, press the sandpaper firmly onto the
sander Spray adhesive can be used for this purpose but it's
much harder to remove the sandpaper when you need to
replace it Use a knife blade for cutting sandpaper, not your
good scissors'

Easy-Touch Sandpaper 12" Roll

GPMR6180- 80-gnt
GPMR6183-150-grit
GPMR6185-220-grit

Common Abbreviations Used In

This Manual And On The Plans

Drill Bits D 1/16" D 1/8" D 3/16" (Long Bit)

D 5/64" D 9/64" LI 13/64"
D 3/32" D 5/32" D 1/4"
D

7/64"

LI

3/16"

Fuse = Fuselage

LE = Leading Edge (front)
TE = Trailing Edge (rear)
Ply = Plywood
Stab = Stabilizer
" = Inches
mm = Milimeters

4

1/64" =
1/32" =
1/16" = 1.6mm
3/32" =

1/8" = 3.2

5/32" = 4.0

.4
.8

2.4

Inch Scale

0

10

20

30

Metric Scale

mm
mm

mm

mm

mm

40

Inches x 25.4 = mm (conversion factor)

3/16" = 4.8 mm

1/4" = 6.4
3/8" = 9.5
1/2" = 12.7mm
5/8" = 15.9mm
3/4" = 19.0mm

50

60

70

mm
mm

80

90

1"

= 25.4 mm

2"

= 50.8

3"

= 76.2

6" = 152.4mm
12" = 304.8mm
18" = 457.2mm

100

110

120

mm
mm

130

21" = 533.4 mm
24" = 609.6 mm
30" = 762.0 mm
36" = 914.4mm

140 150

160

170 180

Balsa

Basswood

Get Ready To Build

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

D 2. Remove all parts from the box. As you do, figure out
the name of each part by comparing it with the plans and
the parts list included with this kit Most part numbers start
with CRS4 This identifies the kit The numbers following
CRS4 identify the part 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 page 6
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 remove, do not force them' Instead, cut
around the parts with a hobby knife After removing the die­cut parts, use your Easy-Touch Bar Sander or sanding
block to lightly sand the edges to remove any die-cutting
irregularities.

Plywood

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

5

6

Work over waxed paper covered plans, on a flat work
surface. Refer to the plans to identify the parts and

their locations.

D 1. Locate the shaped 1/4" balsa forward (S01) and aft
stab (S02) parts. Check their fit and sand the mating edges
as needed. Mark a centerline on both parts. Align the
centerlines on the stab parts with the centerline on the
plans. Glue the two parts together with a thin bead of
medium CA. Wipe off any excess from the surface before
it cures.

D 2. Locate the shaped 1/4" balsa fin front (S05) and fin

rear (S06) parts. Check their fit and sand the mating edges

as needed. Glue the two parts together with a thin bead of

medium CA. Wipe off any excess from the surface before
it cures.

D 5. Locate the shaped 1/4" balsa balance tabs (S09),

rudder front (S07) and rudder rear (S08) parts. Check
their fit and sand the mating edges as needed. Glue the
three parts together with a thin bead of thin CA. Wipe off
any excess from the surface before it cures.

D 6. Sand the joints of the elevators and rudder smooth
with sharp 220-grit sandpaper and a sanding block.

D 7. Tape the two shaped 1/4" balsa elevators in position
on the TE of the stab. Center the bent elevator joiner wire
(WBNT101) over the elevators as shown, then mark the
location of the "arms."

D 3. Sand the joints of both assemblies smooth with sharp
220-grit sandpaper and a sanding block.

D 4. Locate the shaped 1/4" balsa elevators (S03) and
balance tabs (S04). Check their fit and sand the mating
edges as needed. Glue the balance tabs to the elevators
with a thin bead of medium CA. Wipe off any excess from
the surface before it cures.

D 8. Carefully draw a centerline around the edges of both
elevators. Drill a 1/8" diameter pilot hole into the LE of each
elevator (on the centerline) at the marked location. Redrill

the holes with a 9/64" bit. The holes must be at least

1-1/8" deep.

D 9. Cut a 1/8" deep groove in the elevator LE between the
inside (root) edge and the hole you drilled (see the "Expert

Tip" on page 8). Insert the joiner wire. Adjust the depth of
the groove until the joiner wire is flush with the LE.

7

D 10. Test fit the joiner wire into both elevators. Make sure
that both elevators are flat on the work surface and that the
tips of the elevators align with the tips of the stab.

D 11. Draw a line 1" from the TE on both sides of the
elevators. Carefully sand a taper from this line to the TE.
Remove equal amounts of balsa from each side of the

elevator until the TE is 1/8" thick.

Lt 1. Locate the 1/8" die-cut ply (W02A) and the two 1/16"
die-cut birch ply (W02B) wing center spars. Use 30­minute epoxy to glue the 1/16" die-cut birch ply center spar
to the front and back of the 1/8" die-cut ply center spar.

Make sure that all three center spars are perfectly
aligned. Wipe off any excess epoxy with alcohol and a

paper towel.

D 2. Lay out the 3/32" die-cut wing ribs R-5 (W04) and the

1/8" die-cut wing ribs R-3 (W08) exactly as shown in the
photo. Position the 1/16" die-cut birch ply doublers R-3B

and R-5B (W01) on each rib as shown. By so doing we will

be making a right and a left pair. Use 30-minute epoxy to
glue the doublers to the ribs. Make sure that the doublers
are perfectly aligned with the ribs.

D 12. Taper the TE of the rudder using the same procedure
as used for the elevators.

D 13. Sand the LE of the elevators and rudder to a "V"

shape as shown on the plans. Sand a radius on the LE and

tip ends of the stab and fin. Leave the TE of the stab and fin

squared off.

D 3. Locate the 1/8" die-cut ribs R-1 (W07) and the 1/8"

die-cut ply doublers R-1B (F01). Use 30-minute epoxy to
glue ribs R-1 together. Then, use epoxy to glue ribs R-1
between the rib doublers R-1B. Make sure that all four
pieces are perfectly aligned. Wipe off any excess epoxy

with alcohol and a paper towel.

8

D 4. Pin the wing center spar over the plans perpendicular
to the building board. Fit the R-1 rib assembly in the
center spar. Place the center jig (W10) under the TE of
the rib assembly. Glue the rib assembly perpendicular to
the center spar using thin CA.

D 7. Cut a 4-3/8" long piece of LE and sub TE. Fit the LE,
then the sub TE to the ribs. The LE must be centered
vertically on each rib. The sub TE should be flush with the
top and bottom of the ribs. Glue ribs R-1 and R-2 to the LE
and sub TE. Do not glue the sub TE to the center jig.

D 8. Sand the ends of the LE and sub TE flush with ribs R-2.

D 5. Fit the 1/8" die-cut rib R-2 (W07) on the center spar.
Locate the 1/8" die-cut ply dihedral gauge (F01). One
edge of the gauge is angled to set the dihedral of the wing,
the other edge is 90° to the bottom of the gauge. Use the
90° edge to align the ribs R-2 perpendicular to the center
spar. Pin the TE of the ribs on the center Jig. Glue ribs R-2
perpendicular to the center spar using thin CA.

D 6. The shaped and notched wing leading edges (W12)
and sub-trailing edges (W12) are fastened together by
thin strips of balsa. Separate them by cutting with a hobby
knife, as shown in the sketch above.

D 9. Use a 3/32" drill bit to drill the wing mounting dowel

hole through the LE. The best way to line up the drill with

the slot in ribs R-1 is to sight down the LE from the side.

Use a 1/4" drill to enlarge the hole while making

adjustments to the alignment.

D 10. Chamfer both ends of the 1/4" x 3-1/2" hardwood
wing dowel (DOWLS030). Test fit the dowel (without glue)
into the LE and ribs R-1. The fit should be snug, so don't
enlarge the slot any more than necessary. When satisfied
with the fit, remove the wing dowel and set it aside for

later use.

9

D 11. Slide ribs R-5 onto the center spar so that the ply
doubler R-5B is toward rib R-2. Align rib R-5 over the plan.

Make sure that the TE of ribs R-2 are seated on the center
jig and the jig tabs on ribs R-5 are against the building
board. Use the rib gauge (5G) (F02) to check the angle of

R-5. Then, glue the ribs perpendicular to the center spar
with medium CA.

D 12. Fit ribs R-3 and the 3/32" die-cut ribs R-4 (W08) into

the center spar. The ply doubler R-3B on rib R-3 is toward

rib R-4. Do not glue the ribs to the center spar. Cut two 6"
long pieces, one from each LE and sub TE. Trim one end of

the LE so that it fits flush against the LE at rib R-2 and is
centered vertically on the front of rib R-5. Glue the LE in

place with medium CA. Trim one end of the sub TE so that
it fits flush against the sub TE at rib R-2 and is flush with

the top and bottom of rib R-5. Glue the sub TE to rib R-5
and the TE at rib R-2 with medium CA. Repeat this process
for the other side.

D 1. Lightly sand the top of the ribs flush with the center
spar. Cut a 4-1/2" long piece from a 3/32" x 4" x 30" balsa

LE sheet (W13) to fit between ribs R-2. Sand a bevel on
the front edge of the sheet. Test fit the LE sheet in position.
Trim the back edge flush with the back of the center spar.
When satisfied with the fit, press the forward edge of the
sheet tightly against the LE and the ribs, then wick thin CA
along the forward seam. Wipe off any excess CA before it
cures. Apply a bead of thick CA on the top of ribs R-1 and

R-2. Roll the sheet into contact with the ribs and the center
spar. Wick thin CA between the sheet and the center spar.

D 13. Locate the 1/8" die-cut ply dihedral gauge (F01). One
edge of the gauge is angled to set the dihedral of the wing.
The other edge is 90° to the bottom of the gauge. Use the
90° edge of the dihedral gauge to align ribs R-3 and R-4
perpendicular to the center spar. Check that the LE is
centered vertically on the ribs and the sub TE is flush with the
top and bottom of the ribs. Glue the ribs to the LE and sub TE
with thin CA and to the center spar with medium CA.

D 2. Refer to the photo above, then use a razor saw or
hobby knife to finish cutting the partially die-cut aileron
servo opening in ribs R-1.

D 3. Cut two 3/4" long pieces from the 1/4" x 1/2" x 6" balsa

hatch mounting block (W16). Glue the 1/4" edge of the
two pieces flush with the top of the center spar and ribs R­2 with thin CA. Use medium CA to glue the remaining

1/4" x 1/2" mounting block in the slots die-cut in ribs. Trim
the mounting block flush with ribs R-2.

10

D 4. Lightly sand the sub TE to remove any bumps. Cut two
4-1/2" long pieces from a new 3/32" x 4" x 30" balsa LE
sheet to fit between ribs R-2. Refer to the cross-section on
the plans. Edge glue the two pieces together to make a
center skin. Trim the center skin so that it overlaps the

1/4" x 1/2" x 4-1/4" balsa hatch block by 1/4". Glue the

sheet to the ribs and sub TE with medium CA.

D 6. Use 30-minute epoxy to glue the rails in position. Glue
(and clamp for a secure bond) the 7/16" x 5/8" x 3/4"
grooved hardwood landing gear blocks (HRDWD022) to
the inside of the landing gear rails and also to the ply
doubler on R-3 with 30-minute epoxy. It is essential that the
landing gear blocks be accurately aligned with the landing
gear rail.

D 7. After the epoxy has fully cured, drill a 5/32" hole
through the landing gear rail working from the top of the
landing gear block, as shown. By drilling in this manner, the
block acts as a guide for drill bit.

D 8. Carve a slight radius in the groove of the landing gear
rails at the location of the hole. This radius will permit the
landing gear wire to fully seat in the groove.

D 5. Remove the center section from the building board
and test fit the 7/16" x 5/8" x 4" grooved basswood landing
gear rails (HRDWD013) into the notches in ribs R-3, R-4
and R-5. If necessary, carefully sand the notches to allow a
snug fit. The landing gear rails should protrude above the

ribs by 3/32".

D 9. Pin the wing center section back on the building board.
Cut four 6-1/2" long pieces from a new 3/32" x 4" x 30"
balsa LE sheet. Test fit one LE sheet between ribs R-2 and
R-5. Trim the aft edge of the sheet to the center of the
center spar. When satisfied with the fit, press the forward
edge of the sheet tightly against the LE and the ribs, then
wick thin CA along the forward seam. Wipe off any excess
CA before it cures. Apply a bead of thick CA on the top of
ribs R-3, R-4 and R-5 and roll the sheet into contact with
the ribs and the center spar. Wick thin CA between the
sheet and the center spar.

11

D 10. Fit a 3/32" x 1/4" balsa cap strip between the LE and
TE sheeting so that it's flush with rib R-2. Glue the cap strip
to rib R-2 and the sheeting with thin CA.

D 11. Cut eight 2-3/8" long pieces of sheeting from the

remaining piece of 3/32" x 4" x 21" balsa LE sheet. Make
four center skins by edge gluing four pairs of the 2-3/8"
sheets together.

D 14. Use medium CA to glue the 3/32" x 1/4" balsa cap

strips (W19) to the top of ribs R-4. Glue 3/32" x 1/2" balsa
cap strips (W20) to the top of ribs R-5. The edge of the

cap strips on R-5 are flush with the outside edge of the ribs.
D 15. Remove the center section from the building board

and sand the LE, TE and the sheeting flush with both the
R-5 ribs.

D 1. Remove the jig tabs from rib R-5. Sand the bottom of
the ribs flush with the center spar and the TE.

D 2. Cut a 4-1/2" long piece of sheeting from each of the
three 3/32" x 4" x 30" balsa sheets that are left. Lightly sand
off the edges of the 4-1/2" long pieces to remove any
balsa "fuzz." Make a center skin by edge gluing the
pieces together.

D 12. Trim a center skin to fit behind the center spar and on
top of the sub TE from rib R-2 to R-3. Important: Be sure
to get a good glue joint along rib R-2. Glue it in place with
medium CA. Repeat the process for the other side.

D 13. Cut four 4" long piece from each of the four
3/32" x 7/8" x 24" piece of TE sheet (W14). Use medium
CA to glue the 4" TE between ribs R-3 and R-5.

D 3. Trim the center skin to fit between the LE and sub TE
between the R-2 ribs. Be sure the skin is flush with the side
of R-2. Glue in place with medium CA.

LI 4. Hold a 3/32" x 4" x 6-1/2" balsa sheet (cut in step 9,
page 11) tightly against the LE. Press down on the sheet
with your fingers in the vicinity of the landing gear rail to

12

make an impression of the landing gear rail on the inside of
the sheet. Turn the LE sheet over, then cut the access hole
for the landing gear rail using the impression mark as a
guide. Trim the aft edge of the sheet to overlap the center

spar halfway.

D 5. Test fit the LE sheet in position. When satisfied with
the fit, press the forward edge of the sheet tightly against
the LE and the ribs, then wick thin CA along the forward
seam. Wipe off any excess CA before it cures. Gently lift
the aft edge of the sheet and quickly apply a bead of

medium (or thick) CA to the top of each rib. Press the sheet
into contact with the ribs and hold it there until the CA
cures. Wick thin CA along the joint between the sheet, the
center spar and the landing gear rail. Hold the sheet edge
down while the CA cures. Repeat on the other half of the
center section.

D 8. Use medium CA to glue the 3/32" x 1/4" balsa cap

strips to the top of the R-4 ribs. Glue 3/32" x 1/2" balsa cap
strips to the top of the R-5 ribs. The edge of the cap strips

on the R-5 ribs must be flush with the side of the ribs.

D 9. Sand the LE and TE sheeting flush with the R-5 ribs.

D 6. From the 2-3/8" wide center skins (cut in step 11, page

12) trim the skins to fit between the LE sheeting and the
sub TE from ribs R-2 to R-3. Glue them in place with
medium CA.

D 7. Use medium CA to glue previously cut 3/32" x 7/8" x 4"
balsa TE sheet to the TE. Refer to the cross-section shown
on the plans.

D 1. Sand the TE sheeting flush with the sub TE.

D 2. Cut a 4-1/2" long TE from one of the 1-1/8" x 24"
tapered ailerons (W17). From each of the two 1-1/8" x 6-7/8"
TE (W18), cut a 5-3/4" piece. The leftover 1-1/8" TE will be
used on the outer wing panels. Fit the 4-1/2" long TE on the
aft edge of the wing center section. Glue the TE to the aft
edge with 6-minute epoxy. Use masking tape to hold it in
position until the epoxy cures. Wipe off any epoxy that may
squeeze out with a paper towel. Bevel the ends of the TE to
match the angle at the center section. Trim the 5-3/4" TE to
fit the outboard sub TE and glue them in position with
medium CA.

13

D 3. After the wing center section TE'S are completely
secure, use 6-minute epoxy to glue the 1/16" die-cut birch
ply wing plate (W01) in position on the bottom of the wing.
The aft edge of the wing plate must be centered and flush
with the aft edge of the TE. Clamp the wing plate in position
while the epoxy cures.

D 4. Sand the TE flush with the ribs R-5.
D 5. Use 220-grit sandpaper to thoroughly sand the entire

wing center section.

Note: The wing panels are built "UPSIDE-DOWN" on the
plans. Since it is the standard convention to show the Top

View of the wing, and the wing panels are built upside­down, the Left wing panel is built over the Right Wing Top
View and vice-versa. This does not present any

problems; just be sure to build a left and a right wing.

TWO WARPED SPARS INSTALLED

THIS WAY WILL RESULT IN A

STRAIGHT WING

D D 2. Don't use any glue until instructed to do so. As
the wing panels are built upside-down, fit ribs T-1 through
T-7 over the spar. The jig tabs against the building
board should be closer to the TE than the jig tabs
facing upward.

D D 3. Sight down the length of the TE. Check that all ribs
are aligned and have the correct side up.

TWO WARPED SPARS INSTALLED

THIS WAY WILL RESULT IN A

WARPED WING

D D 1. Use the cross-pinning technique, (see sketch above),
to pin a 3/8" x 3/8" x 24" balsa spar (W15) over a wing plan.

Don't forget to cover the plans with waxed paper.

D D 4. Draw a line through the two index marks on the 1/8"
die-cut ply dihedral gauge (F01).

D D 5. Glue ribs T-2 and T-7 to the lower spar aligned over
the plan and perpendicular to the building board. Use the

90° back edge of the dihedral gauge to keep the ribs

perpendicular to the building board.

14

D D 6. Glue the LE, centered vertically, on ribs T-2 and T7.
Glue the remaining sub TE flush to the top and bottom of
ribs T-2 and T-7.

D D 7. Glue ribs T-3 through T-6 to the LE and sub TE so that
they are perpendicular to the building board and their jig tabs

are against the building board. Start with the outside ribs and

work toward the center. Make sure each rib is pressed

against the lower spar and aligned with the plans.

D D 10. Install 1/16" x 3" x 1-5/8" balsa shear webs (W11)
on the aft side of the spars from T-1 to the wing tip. Install
one extra shear web on the forward side of the spars
between ribs T-1 and T-2. Use medium CA and be sure to
get a secure bond. It's not necessary for the shear webs to
be glued to the ribs.

Sheet The Bottom Leading And Trailing Edge

D l-t 1. Sight down the sub TE to check for straightness ­shim the ribs as necessary. Lightly sand the sub TE to
remove any bumps. Use medium CA to glue a remaining
3/32" x 7/8" x 20" balsa TE sheet to the sub TE. Refer to the
cross-section on the plans. Hold a straightedge across the
sheeting while the CA cures to keep the TE flat and straight.

D D 8. Glue the ribs to the lower spar. Next, install and glue
the upper 3/8" x 3/8" x 24" balsa spar in position. Be sure
to keep the ribs perpendicular to the building board as you
perform this step.

D D 9. Align rib T-1 (W06) over the plans. Hold the dihedral
gauge against T-1 with the line meeting the gauge on the
reference line on the plans. The angle of the rib should
match the angle of the gauge. When satisfied with the fit,
use medium CA to glue the rib to the LE, sub TE and spars.

D D 2. Cut a 20" long piece of sheeting from each of the
four remaining 3/32" x 4" x 25-1/2" balsa LE sheets. Bevel

15

the front edge of the 3/32" x 4" x 20" balsa sheet. Press a
balsa sheet tightly against the lip of the LE. Roll the sheet
down against the spar. Trim the sheet 1/8" forward of the

spar's aft edge. This will provide a lip on the spar to glue the
cap strips to later. When satisfied with the fit, press the
sheet tightly against the LE and the ribs, then wick thin CA
along the forward seam. Wipe off any excess CA before it
cures. Roll the sheet into contact with the spar. Working
from the center toward the tip, wick thin CA between the
sheet and the spar.

D D 3. Lift the wing off the building board. Then, while
holding it flat on your work surface, wick thin CA between
the ribs and the sheet from the inside of the wing. Add a
fillet of medium or thick CA along the inside of the LE.

each rib. Press the sheet into contact with the ribs and hold
it there until the CA cures. Wick thin CA along the joint
between the spar and the sheet.

D D 4. Remove the remaining jig tabs and sand the rib
edges smooth.

D D 5. From the 3/32" x 1/4" x 24" balsa cap strip, cut and

install cap strips on the top and bottom of ribs T-3 through

T-7 cap only the top of T-2 between the LE and TE

sheeting. The cap strip on rib T-7 is flush with the side of

the rib. Glue a 3/32" x 1/2" balsa cap strip onto the top of

rib T-1 flush with the side of the rib.

Sheet The Top Leading And Trailing Edge

D D 1. Pin the wing to the building board with the sheeted
side facing down and the jig tabs against the building
board. Trim and sand the jig tabs from the top of the ribs
(the unsheeted side). Sight down the sub TE to make sure
it's straight. Shim any low ribs.

D D 2. Glue a remaining 3/32" x 7/8" x 20" balsa TE sheet to
the TE and ribs as you did with the bottom of the wing panel.

D D 6. Sand the sheeting, spar, sub TE and LE flush with

ribs T-1 and T-7.

D LI 7. Center and glue the 1-1/2" shaped balsa wing tip
(W09) centered on rib T-7. The forward edge must be
centered on the LE.

D D 3. Bevel the forward edge of a 3/32" x 4" x 20" balsa
LE sheet. Press the balsa LE sheet tightly against the lip of
the LE. Roll the sheet down against the spar. Trim the sheet

1/8" forward of the spar's aft edge. This will provide a lip on
the spar to glue the cap strips to later. When satisfied with
the fit, press the sheet tightly against the LE and the ribs,
then wick thin CA along the forward seam. Wipe off any
excess CA before it cures. Gently lift the aft edge of the
sheet and quickly apply a bead of medium CA to the top of

D D 8 Using a razor plane or hobby knife, rough out the
wing tip as shown on the plan. Use progressively finer
grades of sandpaper to finish off the shape.

16

D D 9. Cut the access slot between the spars in T-1 for the
wing center spar.

That's one wing panel down. Now, go back and build the

other one. Remember to build a right and left outer
wing panel.

NOTE: Before actually using any glue, test fit the entire
assembly together to make sure the wing panels fit

properly.

D 3. Sand one end of the remaining 1-1/8" x 1" tapered TE
to match the angle of the wing center section. Use medium
CA to glue both 1" TE'S in position.

D 4. While holding an aileron against the inside edge of the
wing panel sub TE, draw a line on it that matches the inside
edge of the wing tip TE. Cut the aileron 1/8" shorter than
the TE opening to allow for covering material.

D 5. Draw a centerline on the forward edge of the aileron.
Sand the forward edge of the aileron to a "V". Refer to the
cross section of the wing on the plans for the desired angle.

D 1. Cut the 1/8" x 2" hardwood alignment dowel
(DOWEL049) in half. Insert 1/2" of the 1/8" x 1" alignment
dowel through the hole at the aft end of R-5. Glue it to the
inside of the TE perpendicular to R-5.

D 2. Assemble only one wing panel to the center section at
a time. Completely coat the spars and shear webs inside
the access slot with 30-minute epoxy. Use a stick or brush
to apply epoxy to rib T-1. Slide the wing panel on the wing
center spar. Glue the 1/8" alignment dowel to the inside TE
of the wing panel. Make sure the panel and center section
are aligned from the LE to TE, then clamp or tape them
together until the epoxy cures.

D 1. Cut two 5" long pieces from one of the 24" outer
pushrod tubes (PLTB011). Sand the outside of the tubes
with 80-grit sandpaper to roughen them for better glue
adhesion.

D 2. Slide the pushrod tubes through the holes in ribs R-2
through R-4. About 1/2" of the tubes should protrude into
the aileron servo bay. Glue the pushrod tubes to the ribs
with medium CA.

17

Equal distance

D 3. Position the 1/16" die-cut birch ply aileron servo

hatch (W01) over the aileron servo bay and mark the

location of the outer pushrod tubes. Position the aileron

servo on the hatch positioned so that the servo wheel is
centered in the opening of the hatch and aligned with the

marks for the outer pushrod tubes. Use 30-minute epoxy to
glue two 5/16" x 3/4" x 7/8" basswood servo mount blocks
(P516W28) to the aileron servo hatch.

D 4. When the epoxy has fully cured, fit a 1/32" to 1/16"
temporary shim between the servo and the plywood hatch.

Drill 1/16" pilot holes and mount the servo to the blocks.
Then remove the shims.

onto each pushrod, spacing them about 2" apart starting 2"
from the threaded end. If the bushings are too loose, put a
drop of thin CA on the pushrod at each bushing.

D 8. Attach the clevises to the aileron servo wheel. Insert
the pushrod in the outer pushrod tube located in the aileron
servo bay.

3/4"

1/2"

1/16" HOLE

D 5. Trim a servo wheel as shown. Then install it on
the servo.

LI 6. Position the aileron servo hatch on the servo bay. Drill
1/16" pilot holes through the hatch and hatch blocks at the
embossed marks on the hatch. Remove the hatch and place
a drop of thin CA in each hole in the hatch blocks. Wipe off

the excess CA and reinstall the hatch. Secure the hatch to
the wing with five #2 x 3/8" sheet metal screws (SCRW024).

D 9. Locate the 1/8" die-cut ply bellcrank supports (F01).
Assemble the bellcrank parts on the supports as shown
above making a left and a right. Put a drop of medium CA
on the nut and the threads of the 4-40 bolt to prevent the
nut from vibrating loose.

D 10. Align the outermost hole in the bellcrank with the
pushrod. Use medium CA to glue the bellcrank support to
rib T-1 and the shear web. Then, apply a fillet of thick CA
along the joint.

D 7. Thread two nylon clevises (NYLON17) thirteen
complete turns onto two 2-56 x12" threaded rods
(WIRES16). Slide silicone clevis retainers (PLTB021)
over the clevises. Cut four 3/16" long bushings from the
6-1/2" inner pushrod tube (PLTB004). Slide two bushings

D 11. Attach a solder clevis (METAL030) to the outermost
hole in the bellcrank. Align the bellcrank so that it is
perpendicular to the pushrod. Cut the pushrod and solder
the clevis on the end of it. Silver solder is highly
recommended. Reinstall the control rod on the bellcrank.

18

D 15. Drill two 1/4" holes through the wing center TE using
the holes in the wing plate for the locations.

Well, that completes the wing construction for now, so clean
up your work bench, grab a cup of coffee, and let's start
building the fuse.

Building Notes:

D 12. Use the template on the wing plan to make two
bellcrank sheets from the 3/32" scrap balsa LE sheeting.
Glue the bellcrank sheet to the LE sheeting and ribs T-1
and T-2. Finish covering rib T-1 with a 1/2" cap strip and T-2

with a 1/4" cap strip.
D 13. Inspect all the glue joints in the wing and apply CA

where necessary. Using 220-grit sandpaper, blend the LE

into the LE sheeting.

D 14. Use 6-minute epoxy to glue the wing dowel in

perpendicular to the LE.

19

Note: All fuse formers must be installed with their
die-stamped numbers facing forward. This is to ensure

correct alignment of the pushrod holes and locking tabs.

D 1. Locate both die-cut 3/32" balsa upper fuse sides and

lower fuse sides (F05). Glue the upper and lower fuse
sides together with thin CA. Sand the fuse side smooth with
220-grit sandpaper.

D 2. Place the fuse sides on a flat work surface with the
wing saddles facing each other as shown in the photo. Use

medium CA to glue the die-cut 1/8" ply fuse doublers
(F01) in position. The edges must be flush, and the 1/8" x

1" notch at the forward end of each fuse side must exactly

match the doublers' notch. Note: Make a right and a left
fuse side. The right side has a slot for the outer pushrod
tube exit. Use the pieces from the die-cutting to fill in the
pushrod exit slot in the left fuse side.

Note: The formers are stamped only with the necessary
part of their names.

D 5. Use 6-minute epoxy to glue the 1/8" die-cut ply

doubler C-2 (F02) to the front of the 1/8" die-cut ply former
F-2 (F02). The hole through C-2 must be aligned with the

hole through former F-2.

D 6. Draw a centerline on the side of F-9 (F02) opposite the

stamped part name. Drill a 3/16" hole at at each punch
mark on formers F-4, F-6, F-7 and F-8. Glue F-2, F-3, F-4,

F-6, F-7, F-8 and F-9 (F03) into the notches of the forward
crutch and the aft fuse top as shown. Use a triangle to hold
all the formers vertical while the CA cures. Make sure the
embossed labels on the formers face forward.

Note: The fuse is built upside-down over the plans. The
plan sheet may be cut apart if space is a problem.

D 3. Cover the bottom view of the fuselage plans with
waxed paper.

D 4. Position the two 1/8" die-cut balsa aft fuse top halves
(FO6) and the 1/8" die-cut ply forward crutch (F04) over
the plans. Glue the two aft fuse top halves together with thin
CA. Then, glue the aft fuse top and forward crutch together.
Warning: When aligning the forward crutch over the plans,
make sure the proper thrust angle is set at the front.

D 7. Fit a fuse side in position. Make sure all of the tabs
are fully seated in the notches. Wick thin CA into all joints
between the formers, the forward crutch and the aft fuse
top. Add a fillet of medium CA to one side of each former
where they touch the fuse sides. Repeat this operation for
the other fuse side.

D 8. Glue the 1/8" die-cut ply former F-10 (F02) between
the fuse sides, flush with the aft edge of the fuse. Use a
triangle between the fuse side and the building board to
check vertical alignment of F-10.

20

D 9. Glue the 1/8" die-cut ply former F-5 (F03) into the

notches of the fuse doubler.

D 3. Trim and sand the outer pushrod tube that protrudes

from the fuse, flush with the fuse side.

D 1. Using 220-grit sandpaper, sand the area 2" to

3-1/2" from the top of the tail gear wire (WBNT233) and

the unthreaded end of the tail gear arm (WBNT234).

Wipe the wires clean with rubbing alcohol.

D 10. Use 30-minute epoxy to glue the 1/2" x 3/4" x 1-3/8"

hardwood wing bolt blocks (F12) into the notches at F-5.

Add fillets of epoxy all around these blocks, for a secure bond.

D 11. Remove the lower fuse frame from the building board
and give it a quick once-over with a sanding block and 150­grit sandpaper.

D 1. From the two remaining 24" long outer pushrod
tubes (PLTB011), cut one 19" long. Sand the outside of
both tubes with 80-grit sandpaper to roughen them.

D D 1. Place a mark 2-3/4" from the top of the tail gear wire.

Using the 8" piece of wrapping wire (WIREF14), attach the
tail gear arm to the tail gear wire so that the threaded

portion of the tail gear arm is aligned with the mark and

parallel to the tail wheel shaft. Note: Make sure that one

plastic bushing is above the tail gear arm and one is below.

D 2. Slide the 19" outer pushrod tube through the holes in
the left side (as viewed from the tip of the fuse) of formers

F-4, F-6, F-7 and F-8. Slide the 24" tube through the holes
on the right side and out the slot in the fuse side. About 1"
of the tubes should protrude forward of F-4. Glue the
pushrod tubes to all of the formers and to the inside of the
fuse sides with medium CA.

D 3. Apply soldering flux to the wrapped area. Using a hot
soldering iron, solder the tail gear arm to the tail gear wire.
Be careful not to melt the plastic bushings. After the tail
gear wire has cooled, trim off the excess wrapping wire.
Clean the area with rubbing alcohol to remove any flux.

21

D 4. Trial fit the tail gear in the fuse. With the plastic

bushings aligned with the centerline on the back of F-9, trim
the tail gear arm to allow it to rotate through F-9. Roughen
the bushing with 80-grit sandpaper. Thread a swivel

(NYLON20) onto the arm until 1/16" of thread protrudes
from the swivel. To attach the tail gear to F-9, wrap the

lower plastic bushing and F-9 together with a piece of

string. Make sure the bushing is aligned with the centerline

on F-9. Glue the bushing to F-9 with 6-minute epoxy.

D 5. Screw a swivel clevis (NYLON21) 13 turns onto the
end of a 36" wire pushrod (WIRES17). Cut the unthreaded
end to shorten the wire to 23-1/2". Cut six 3/16" bushings
from the plastic inner pushrod tube provided in the kit. Slide
the bushings on the wire pushrod, spacing them about 3"
apart as shown on the plans. If they are too loose, put a drop
of thin CA on the pushrod wire at each bushing to secure
them in place. Locate the bushings on both ends so that

they will not exit or snag on the outer pushrod tubes.

D 7. Use medium CA to glue the 1/4" x 24" balsa triangle

sticks (F10) flush to the fuse sides and the bottom of the

formers from F-5 through F-10. Sand the triangle sticks and
fuse sides flush with F-5 through F-10.

D 8. Sheet the bottom of the fuse with a 1/16" x 3" x 30"
balsa sheet (F18). The sheeting is applied cross-grain.
After the sheeting has been applied, trim and sand the
sheeting flush with the fuse sides.

D 6. Slide the wire pushrod into the outer pushrod tube and
connect the clevis swivel to the swivel. Check that the tail
gear moves smoothly and that the swivel clevis does not
bind on F-9.

D 1. Use 30-minute epoxy to glue the 1/8" die-cut ply F-1A
firewall (F04) and two 1/8" die-cut ply F-1B firewalls (F01)
together. Make sure the die-cut punch marks on F-1A are to
the outside.

22

With the sheet pressed against the firewall and former F-2

use medium CA to glue one piece to the right fuse side
only. The joint between the fuse side and the sheeting will
be slightly offset.

D 6. Wet the outside of the sheet with water and let it soak

in for a few minutes. Firmly, yet carefully, pull the sheet
around the firewall and mark where it crosses the centerline
of the 3/16" square center stringer. Cut the sheet on the line
you marked.

D 2. Test fit the firewall in the fuse. Remove any cured epoxy
that may prevent the firewall from seating tight against the
fuse sides and fuse doubler. The firewall angles slightly to
the right to compensate for torque. The left side of the
firewall is flush with the front of the fuse side. There is a
slight gap between the firewall and the fuse doubler. Cut
three pieces from the 1/2" x 12" triangle stick (F08) to fit
between the firewall, fuse sides and forward crutch. After you
are satisfied with the fit, epoxy the firewall and triangle sticks
to the fuse with 30-minute epoxy.

D 3. After the epoxy has cured, sand the fuse sides flush
with the front of the firewall..

D 4. From a 3/16" x 3/16" x 30" balsa stringer (F07), cut and
glue a stringer into each notch from the firewall to former F-2.
Sand the stringers flush with the firewall and former F-2.

D 7. Pull the sheet into position and glue it in place.

D 8. Apply the sheet to the other side in the same manner
as described above. Sand the sheeting flush with the
firewall and trim it to match the LE of the wing at the
wing saddle.

The Great Planes adjustable engine mount is simple and
convenient to use. It may be used to mount most .40 - .60
two-stroke and .40 - .70 four-stroke engines.

D 5. Cut Two 4" long pieces from the 3/32" x 3" x 8-7/8"
balsa front lower sheet (F17). Fit the lower sheet so that
the rear corner is aligned with the LE of the wing saddle.

D 1. Cut or break the "spreader bar" from each mount half.
Carefully trim any extra material left by the spreader bar
from each mount half. The surface where the spreader bars
were attached must be smooth to allow the mount halves to
fit together. Trim the flashing off any rough edges if
necessary. Assemble the mount halves as shown.

23

D 2. Draw a centerline on F-1A by connecting the punch
marks on the firewall.

marks on the mount. Tighten the 6-32 screws to hold the

mount firmly in position against the firewall. Position the
engine so that the front of the drive washer will be 4-15/16"
in front of the firewall. Mark the engine mounting holes on
the mount. Remove the engine and drill a 7/64" hole
through the beams at each mark. Install the engine with the
6-32 x 3/4" sheet metal screws (SCRW018) that have
been provided with this kit.

D 3. Drill a 11/64" diameter hole at each of the four die­punch marks on F-1A. Then install the mount sideways
using four 6-32 x 1" machine screws (SCRW008), #6 flat

washers (WSHR004) and 6-32 blind nuts (NUTS003).

Tighten the machine screws all the way to draw the blind
nuts into position, then loosen them slightly to allow the
mount to be adjusted to fit the engine. Secure the blind nuts
to the firewall with a drop or two of medium CA around the
flange.

Note: When installing an O.S. .70 4-stroke engine, you will
need to remove the choke mechanism in order to position

the engine far enough back on the mounting rails to achieve
the 4-15/16" distance from the firewall.

D 5. Mark the location for the throttle pushrod hole on F-1A.

D 4. Slide the engine mount halves apart until the engine
mounting lugs will sit flat on the beams. Adjust the mount
until the firewall centerline is centered between the "tick"

DI 6. Use a 3/16" drill bit to drill a hole through the firewall at

the throttle hole location you marked in step 5. Cut and
insert an 8" length of remaining outer pushrod tube
through the firewall. Mark formers F-2 and F-3 where the
tube needs to pass through. Drill a 3/16" hole through the
formers or cut notches at the marks. Adjust the outer
pushrod tube so that it extends 1/4" past the firewall. Glue
the tube in place.

24

D 7. Cut off approximately 1/2" of threads on the 4"

threaded rod (WIRES72). Completely screw the threaded

rod into one end of the 12" inner pushrod tube
(PLTB012). Attach a solder clevis to the throttle arm and
insert the inner pushrod tube into the outer pushrod tube in

the firewall. With 3/4" of inner pushrod tube protruding from

the outer pushrod tube, bend the threaded rod to clear the
muffler. Rotate the throttle arm toward the firewall and mark

the location where the threaded rod passes through the

solder clevis. Cut the threaded rod at the mark and solder

the clevis onto it.

Note: We used a 10 oz. Great Planes Tank (#GPMQ4104)

in out prototypes. By using the supplied right angle fuel
supply tube, the fuel tubing can be routed to the top of the
firewall without the risk of kinking the tube. You may also

route the fuel tube below the forward crutch to make fishing
the tubes a little easier. The choice is yours.

We strongly recommend that the engine be removed from

the engine mount and stored back in its box to prevent dust

from entering the engine.

D 1. Glue the die-cut ply formers F-2B, F-3B, F-4B, F-6B,

F-7B, F-8B and F-9B (F02, F03 and F04) into their notches
on the fuse top. Use a triangle to maintain the vertical
alignment of the formers.

D 2. From a piece of 1/8" scrap ply, cut two 1/2" x 3-1/2"
servo tray doublers. Glue the doublers on the forward and
aft edges of the servo cutout in the forward crutch.

D 8. Temporarily install the fuel tank. It's much easier to see

what is happening at this stage of construction. Decide
where you want the fuel and vent tubes to exit the firewall
and mark the locations. Remove the tank and drill two

15/64" (or 7/32") fuel tube exit holes through the firewall at
the locations you marked. Before reinstalling the fuel tank,
fuelproof the fuel tank compartment. Wrap the fuel tank in
foam to prevent fuel foaming from vibration. Reinstall the
tank and connect the fuel tubes. Check for kinks and rectify
any problems before proceeding.

D 3. Cut two of the 3/16" x 3/16" x 30" balsa stringers in
half. Fit the stringers from former F-6B to F-9B and glue
them in place with thin CA. Sand the end of the stringers
flush with F-6B and F-9B.

D 4. Cut three 13" long pieces from the remaining
3/16" x 3/16" balsa. Install the stringers flush with the front
of the firewall, allowing them to overhang former F-4B.

25

D 5. Slide the 1/8" die-cut ply instrument panel (F03)

under the stringers. The top of the instrument panel angles
toward the front of the fuse. Adjust the panel so that it's
tight against the stringers but does not bend them. Sand
the bottom of the panel to match the angle of the forward
crutch. Glue the instrument panel to the stringers and
forward crutch. Then, sand the stringers flush with the

instrument panel.

D 6. Glue the 3/32" x 3-1/4" x 15" balsa front deck
sheeting (F15) to the front upper deck following the same
procedure used for sheeting the forward bottom. Allow the
sheeting to overhang the instrument panel into the cockpit
by 1/2".

D 8. Trim the turtle deck sheet so that it overhangs former

F-6B by 1" and F-9B by 1/8". Glue the sheet to the fuse
sides, formers F-6B through F-9B and the stringers. Repeat
the process on the other side.

D 9. Trim and sand the turtle deck sheeting and stringers
flush with the top of formers. Sand the aft edge of the
sheetina flush with F-9B.

D 7 Cut the two 3/32" x 3" x 18" balsa sheets (F14) as
shown in the photo above. Glue the small piece to the other
end to make a turtle deck sheet 4" wide at one end
and 2" wide at the other. Sand the joint smooth with
220-grit sandpaper.

D 10. From a 3/32" piece of scrap balsa cut a 1" wide piece

to fit between the turtle deck sheet and the forward

deck sheet.

D 11. Glue the 1/2" x 2" x 12" balsa turtle deck block
(F19) centered on top of formers F-6B and F-7B and flush
with the front of former F-8B.

26

D 12. Insert the fin in the slots in formers F-8B and F-9B.

Glue the 1/2" x 7/8" x 3-7/16" balsa filler block (F20) on
each side of the fin. Do not glue the blocks to the fin. After
gluing the blocks in position, remove the fin and sand the
aft ends of the blocks flush with F-9B.

D 13. Use epoxy to glue the top plastic tail gear bushing,

centered on former F-9B just below the slot for the fin.

Mount The Wing To The Fuselage

D 1. Clean out the wing dowel hole in F-2 with a 1/4" drill
bit. Test fit the wing and adjust the dowel hole in F-2, if
needed, with a round file.

D 3. Tape the wing in position. Run a 1/4" drill bit through

the holes in the aft end of the wing to lightly mark the wing

bolt blocks. Do not drill the hole with the 1/4" bit. Remove
the wing and drill a 13/64" (or use a #10 drill bit) through
each of the wing mounting blocks. Angle the holes as
shown on the side view of the fuse plan. Cut threads in
each block with a 1/4-20 tap. Put a couple of drops of thin
CA on the threads and, after it has fully cured, run the tap
back through the holes to clean up the threads. Bolt the
wing to the fuse with two nylon 1/4-20 wing bolts and leave

it in place for the next few steps.

D 2. Seat the wing in the wing saddle and visually align it

with the fuse. Pin a string to the center of former F-10, then

extend it out to a wing tip. Put a piece of tape on the string
to mark the intersection of the string and the wing tip. Swing
the string over to the other tip and see if the distance is the
same (see diagram). Make slight adjustments to the angle
of the wing until the distance from the tail to the wing tips
is equal.

D 1. Draw an accurate centerline on the top of the stab,
perpendicular to the stabs TE.

D1 2. Center the stab on the stab saddle and pin it in
position. Study the aft end of the structure from 6-10 feet
back. If the stab tips are not equidistant above the wing,
carefully sand the high side of the stab saddle until the
stab is aligned.

27

D 3. Cut two 1/4" long pieces from the 1/4" x 1/4" x 7"

balsa stick (F11). Glue each 1/4" piece in front of the stab,
slightly overhanging the fuse side.

C1 4. Center the stabilizer using the centerline you drew in
step #1. Measure the distance from each stab tip to a pin
centered at the nose.

D 7. Sand the front and bottom of the stab blocks to match
the angle of the turtle deck. Glue the stab blocks to the

1/4" x 1/4" sticks on the stab saddle. Sand the stab blocks
and 1/4" x 1/4" sticks so that the 1/2" x 2" x 6-1/2" balsa stab
top block (F22) can be aligned with the turtle deck block.

D 8. Cut a 1/8" groove on the forward end of the stab top
block for the tail gear. Glue the stab top block onto the stab
blocks and to the aft end of the turtle deck block. Sand the
aft end of the stab top block flush with former F-10.

D 5. Cut the remaining 1/4" balsa stick in half and glue
each piece to the fuse at the aft edge of the stab, slightly
overhanging the fuse side. Be careful not to glue the stab to
the stab saddle. Remove the stab and sand the 1/4" balsa
sticks flush with former F-10.

D 6. Draw a line connecting two corners of the 1/4" x 7/8" x 5"
balsa stab fairing block (F21). Cut the block in half diagonally.

D 9. Glue the 3/4" x 1-1/4" x 1-3/4" balsa tail block (F23)
flush with the bottom of former F-10.

D 10. It's time to get out your carving knife or razor plane
and Easy-Touch Sander with 80-grit sandpaper. Carve and

sand the turtle deck and tail block to shape as shown on

the plans. Blend the fuse sides and the top and bottom

sheeting together.

28

D 11. Now is a good time to apply balsa filler to any gaps in
joints. This will allow you to finish sand most of the fuse

before installing the fin and stab.

D 12. Trim the canopy with a scissors using the embossed
cut lines for reference.

D 1. Reinstall the wing on the fuse. Cut a notch for the
elevator joiner wire at the aft end of the slot for the stab.

Install the joiner wire in the notch. Then slide the stab into
the stab cradle. Check that the stab is still parallel to the
wing and that the stab tips are an equal distance from the

nose of the fuse. Lightly draw lines on the top and the

bottom of the stab at the joint between the stab and fuse.

Remove the stab and apply 30-minute epoxy to both sides
of the stab between the lines. Slide the stab into position
and check its alignment. Wipe off the excess epoxy with
alcohol and a paper towel and allow the epoxy to cure.

D 13. The top deck sheeting overlaps the instrument panel
by 1/4". Use T-pins to locate the instrument panel and draw
a line 1/4" behind them. Cut the 1/2" turtle deck block flush
with former F-6B. Center the canopy over the cockpit and

mark the outline. Now, move the canopy approximately 1/4"
in the direction of where the cut will be made and mark the
outline again. By cutting the balsa on the inside line, a 1/4"
border will be left to mount the canopy.

D 14. Now that the balsa filler has had a chance to dry,
finish sand the tail section area. Check all the joints around
the balsa blocks and sheeting. If any have come loose or
were missed during the building process, glue them before
finish sanding with 320-grit sandpaper.

D 2. Position the fin in the slot in the turtle deck. Hold a

triangle on the stab and close to the fin. Check that the fin
is perpendicular to the stab. Glue the fin in the slot with
6-minute epoxy.

D 3. Test fit the elevators on the stabilizer and sand as

necessary to clear the fuse sides.

Note: We recommend that the stab and fin be installed at
this point in the construction process. By installing them

now, a small fillet can be made at the joint between the
fuse, stab and fin. However, to make covering the fuse
easier, the stab and fin can be installed after everything
is covered.

D 4. Make sure that the tail gear moves freely while
applying upward pressure. Hold the rudder up to the fin and
mark the tail gear "arm" location on the rudder LE. Drill a
7/64" hole 7/8" deep at this spot.

29

D 5. Cut a groove from the tail gear hole to the bottom end
of the rudder to allow the rudder to fit tightly against the fin.

D 6. To easily make a fillet along the stab and fin, place a
piece of masking tape 1/4" on both sides of the joint. Apply
balsa filler to the joint using your finger. Remove the
masking tape. Then wet your finger and wipe across the
fillet to smooth it out. After the filler has dried lightly, sand
the fillet with 320-grit sandpaper.

D 2. Use the template on the plans as a guide to cut the
belly fairing sheet from 1/16" x 3" x 18" balsa (F16). Sand
the edges of the sheet so that it blends into the bottom
sheeting on the wing. Glue the belly fairing sheet to the
wing, then use balsa filler to finish blending it into the wing.

LI 3. Cut a 4-1/4" long piece from the 3/32" x 1/2" balsa cap
strip balsa to make an aft belly fairing end. Cut a notch in
the center so that the belly fairing end fits over the wing

plate. Glue the aft belly fairing end to the top of the wing
plate and wing, flush with the TE. Leave approximately
1/16" between the belly fairing end and former F-5. Sand

the top of the belly fairing end so that when a 3/32" sheet is
applied, it will be flush with the fuse bottom sheeting.

Note: Before working on the belly fairing, we suggest that
you remove the wing from the fuse and insert a layer of
waxed paper between former F-2 / LE joint and F-5 / TE
joint of the wing. This will help prevent the wing from being
accidentally glued to the fuse.

D 1. Fit the 1/8" die-cut balsa belly fairing front (FO6) on
the LE of the wing. Leave a gap of 1/16" between the BF
and F-2. Align the belly fairing front with former F-2 and
glue it in place.

D 4. Cut two 7" long pieces from the 3/32" x 1/2" balsa cap
strips to make aft belly fairing sides. From the plans, use
the template as a guide to cut the belly fairing sides. Sand
the belly fairing sides to achieve a close fit to the wing
bottom. Glue the sides to the wing and aft belly fairing end.

30

D 5. Glue two 1/4" x 1/4" x 4" triangle sticks from 1/4" x

1/4" x 12" tri-stock (F10) to both sides of the belly fairing
sides, flush with the top of the sides. Trim the triangle sticks
to allow the wing bolts to be removed.

D 6. Remove the wing from the fuse and remove the wing
bolts. Cut three 4-1/4" long pieces of 1/16" x 3" sheeting.
Edge glue the three pieces together. Place a mark 7"
forward from the belly fairing end. Set the sheeting on the
aft belly fairing sides with'the forward edge flush with the
line. Sand the forward end to blend into the wing. Glue the
sheeting to the belly fairing sides, end and the wing. Trim
and sand the sheeting flush with the aft belly fairing end.

D 7. Using a 1/4" drill bit, insert the drill bit through the wing
bolt holes from the top of the wing and drill through the
belly fairing sheeting. Enlarge the holes in the sheeting to
allow the head of the wing bolt to seat against the

wing plate.

D 1. Trim the cowl ring (COWL028) and the cowl flap
(COWL029) with a scissors using the embossed cut lines
for reference. Use medium CA to glue the lip on the cowl
flap inside the cowl ring. Sand the joint on the inside with
220-grit sandpaper and clean it with rubbing alcohol. Use
thin CA or 30-minute epoxy to glue the 1" fiberglass strip
over the joint inside the cowl.

D 2. On the cowl ring, place marks 1/4" forward from the aft
edge at the 1 o'clock, 5 o'clock, 7 o'clock and 11 o'clock
positions, in the larger cowl flap area, as shown on the
plans. Use a 3/32" drill bit to drill a hole through the cowl at
each mark. Place a mark in the center of each 1/2" x 1/2" x

1/2" hardwood cowl block (F13) and drill a 1/32" hole
through each block at the mark.

D 3. Sand the drilled end of the cowl blocks to match the
curvature of the cowl.

D 8. Reinstall the wing on the fuse and sand the aft belly

fairing to blend with the fuse and the wing. Remove the

wing and clean up the LE and TE of the belly fairing.

D 4. Cut four 5/8" square cowl mount pads (F24) from the
1/32" x 5/8" x 3-1/2" birch ply sheet. Sand the area around

the screw holes in the cowl. Glue the cowl mount pads to
the cowl with 6-minute epoxy. After the epoxy cures, drill
through the pads with a 3/32" drill bit.

31

D 5. Attach the cowl blocks to inside of the cowl using
#2 x 3/8" sheet metal screws.

D 6. Stand the fuse up on its tail. Center the cowl on the
fuse and mark the cowl block locations on the firewall. Use

the marks to help locate the cowl blocks on the firewall and
glue the cowl blocks to the firewall with 6-minute epoxy.

D 1. Fill any scuffs, dings and the forward end of the
pushrod tube exit slot with balsa filler. After the filler has
hardened, sand the entire structure with progressively finer
grades of sandpaper, ending with 320-grit.

Fuelproofing may be done either before or after covering.

D 1. Fuelproof the engine compartment paying special
attention to the firewall. Top Flite LustreKote paint or
30-minute epoxy is recommended.

D 7. Remove the cowl and install Hie muffler. Cut a piece of
clear butyrate or thin card stock to use as a template (not
included) long enough to cover the engine. Tape the
template to the fuse and with a marker draw the outline of
any part that will protrude out of the cowl (for example, the
needle valve, glow plug and muffler). Trim the area from
inside the lines on the template. Test fit the template over
the engine and trim as needed. Carefully remove the
engine without disturbing the template and reinstall the
cowl. With the template still taped to the fuse, lay the
template on the cowl and mark the location where holes will
need to be cut. Remove the cowl and trim out the openings.

D 8. Reinstall the engine on the engine mount and trial fit
the cowl over the engine. Allow approximately 1/16" of
clearance around the muffler for cooling.

D 2. Fuelproof any external exposed wood.

SPECIAL NOTE: Do not confuse this procedure with

"checking the C.G." or "balancing the airplane fore and
aft." That very important step will be covered later in
the manual.

Now that you have the basic airframe nearly completed,
this is a good time to balance the airplane laterally

(side-to-side). Here is how to do it:

D 1. Temporarily attach the wing and engine (with muffler)
to the fuselage.

D 2. With the wing level, lift the model by the engine

propeller shaft and the fin post (this may require two
people). Do this several times.

D 3. If one wing always drops when you lift the model, it

means that side is heavy. Balance the airplane by gluing
weight to the other wing tip.

NOTE: An airplane that has been laterally balanced will
track better in loops and other maneuvers.

32

The Corsair 40 does not require much painting to
obtain the scheme shown, on the box, as most of the finish
is done with Top Flite MonoKote Film The only painting
required is for the cowl and canopy frame

The technique we will describe here is the how the
model pictured on the box was finished Make sure the
structure is smoothly sanded with 320-grit sandpaper
Remove all dust from the structure with a Top Flite Tack
Cloth so the MonoKote will stick well

Cover the aircraft with MonoKote using the following
sequence Make sure the MonoKote is thoroughly stuck
down to the structure and all of the edges are sealed Use a
Top Flite MonoKote Hot Sock" on your covering iron to
avoid scratching the MonoKote Film.

COVERING TECHNIQUE

You can practically eliminate covering wrinkles that
sometimes occur when the model is left out in the sun or
in the back of your car by following this technique used in
the Great Planes model shop

A Cover your sealing iron with a Top Flite Hot Sock and
turn the heat about 3/4 of the way to the high setting

B Cut a piece of MonoKote film about 2" larger all around
than the surface you are covering Strip off the backing
and position the film Tack the film down smack dab in

the middle of the surface.

C Pull (as in stretch) the film toward one end, sealing it to
the balsa from the center out to the tip Work out any
wrinkles and air pockets as you proceed with a
combination of circular and back and forth motion

D. Do the same procedure working the opposite
direction from the center

E Pull and seal diagonally toward the four corners,
always starting from the center The trick is to shrink out
any wrinkles before you seal the film to the surface

F Use a heat gun to heat and to stretch the film around
curved surfaces like the stab and rudder tips, while pulling
on the excess material You may need to pull hard to get
out all of the wrinkles, so wear a glove if you need to
Follow-up the heat gun with your sealing iron to secure
the bond

The idea behind this approach (which can be applied to

any part of the model) is to prestretch the MonoKote
film as it's applied, and remove the air pockets that can

expand later to cause the sags and wrinkles

When covering areas that involve sharp junctions, like
the tail section, cut narrow strips (1/4" to 3/8") and apply
them in the corners before covering the major surfaces

The larger pieces of MonoKote Film will overlap and

capture these smaller pieces This technique also bypasses
the need to cut the MonoKote Film in these areas after it

has been applied DO NOT, under any circumstances,

attempt to cut the covering material after it has been

applied to the fin and stab, except around the leading
and trailing edges and the tip. Modelers who do this often

cut through the covering and part-way into the balsa stab
This can weaken the stab to the point where it may fail
in flight!

1. Tail Junction Strips

2. Rudder left and right side
3 Bottom of elevators

4. Top of elevators
5 Stab bottom
6 Stab top

7. Fin left and right side

8. Fuse bottom

9. Fuse sides

10 Fuse top (May require three pieces one on each side

and a small triangular piece on the top)

11. Ends of ailerons

12. Bottom of ailerons

13. Top of ailerons

14. TE surfaces of wing and belly fairing

15 Junction strips between wing panels

16 Bottom of left outer wing panel

17 Bottom of right outer wing panel
18 Bottom of Left and Right inner wing panels

19. Sides and bottom of belly fairing

20. Top of left outer wing panel

21. Top of right outer wing panel
22 Top of left and right inner wing panels.
23 Top of center section

24. Front and back of landing gear doors

Paint used on the prototype: We used Top Flite LustreKote
Insignia Blue to paint the cowl and canopy frame

First wet sand the cowl with 400-gnt sandpaper to provide a
rough surface for the paint to adhere to Wash and dry the
cowl thoroughly On the canopy, mask the area not to be
painted Roughen the area to be painted with 000 steel

wool or 400-gnt sandpaper Clean the area thoroughly with

alcohol and a paper towel

To spray the cowl with LustreKote paint First spray a light
coat on the inside and outside Let the paint flash off (dry)
for about two minutes Then, spray a wet coat on (a wet
coat will look slightly rough when first sprayed, but will
smooth out after a couple of seconds) Be careful not to get
the paint on so heavy that it runs For best results, allow the
paint to dry for two or more hours Then spray another wet
coat Allow the paint to dry overnight before installing the
cowl on the fuse

To spray the canopy with LustreKote Paint Make sure the

masking is down around the edges Spray light coats of
paint Allow the paint to dry for 5 minutes between coats.
After the desired coverage is obtained, remove the mask
and allow the paint to dry overnight.

33

We have found that it's much simpler to do all hinging and

control horn installation after the model is covered.

D 1. Cut the hinge slots in the stab and elevators using the
technique described in the Expert Tip section following
these four steps Test fit the elevators to the stab with the

joiner wire in position When satisfied with the fit, remove

the elevators Pack the joiner wire holes in the elevators
with 30-minute epoxy Then install the elevators on the stab
Make sure that both elevators are parallel with each other
Use a paper towel dampened with rubbing alcohol to
remove any excess epoxy that squeezes out.

D 2 Install the rudder following the same procedure used
to install the elevators

D 3. Install the ailerons on the wing, using four hinges
each.

D 1. Cut the hinge slot using a #11 blade in a standard #1

knife handle The CA hinges provided have a thickness
that fits this type of slot very well Trial fit the hinge into
the slot. If the hinge does not slide in easily, work the

knife blade back and forth in the slot a few times to

provide more clearance (it is really the back edge of the

blade that does the work here in widening the slot).

D 4 After the epoxy has cured, CA the hinges in the control
surfaces.

Note: Refer to the fuse plan for the hinge making
instructions. Cut 16 hinges from the 2" x 9" supplied
material

The hinge material supplied in this kit consists of
a 3-layer lamination of mylar and polyester It is specially
made for the purpose of hinging model airplane control
surfaces Properly installed, this type of hinge provides
the best combination of strength, durability and ease of
installation We trust even our best show models to these
hinges, but it is essential to install them correctly.
Please read the following instructions and follow them
carefully to obtain the best results These instructions
may be used to effectively install any of the various
brands of CA hinges.

The most common mistake made by modelers when
installing this type of hinge is not applying a sufficient
amount of glue to fully secure the hinge over its entire
surface area, or, the hinge slots are very tight, restricting
the flow of CA to the back of the hinges This results in
hinges that are only "tack glued" approximately 1/8" to

1/4" into the hinge slots The following technique has
been developed to help ensure thorough and
secure gluing.

D Drill a 3/32" hole, 1/2" deep, in the center of the

hinge slot. If you use a Dremel Moto-Tool for this task, it

will result in a cleaner hole than if you use a slower
speed power or hand drill Drilling the hole will twist some
of the wood fibers into the slot, making it difficult to insert
the hinge, so you should reinsert the knife blade, working
it back and forth a few times to clean out the slot.

C. Trial fit the hinges into the slots and temporarily attach
the control surface to verify the fit and operation

D Rather than just making a single slit, it is better to cut
away a narrow rectangle of covering to provide an
adequate opening for the CA glue to wick into the slot.

E Insert the hinges and install the control surface Verify
the left-right positioning of the control surface, and close
up the hinge gap to 1/32" or less It is best to leave a very
slight hinge gap, rather than closing it up tight, to help
prevent the CA from wicking along the hinge line Make
sure the control surface will deflect to the recommended
throws without binding If you have cut your hinge slots
too deep, the hinges may slide in too far, leaving only a
small portion of the hinge in the control surface To avoid
this, you may insert a small pin through the center of
each hinge, before installing This pin will keep the hinge
centered while installing the control surface Remove the
pins before proceeding

34

ASSEMBLE, THEN APPLY 6 DROPS

OF THIN CA TO CENTER

OF HINGE, ON BOTH SIDES

F. Apply 6 drops of thin CA adhesive to both sides

of each hinge, allowing a few seconds between drops

for the CA to wick into the slot. Note that the small
"tunnels" you created by drilling the 3/32" holes allow the
CA to freely travel in to the entire surface of the hinge,
producing an extremely secure bond.

THE CA WICKS ALONG THE

•TUNNELS" TO THE ENTIRE
HINGE SURFACE

strap. Attach the gear door to the hump strap with two
#4 x 3/8" sheet metal screws (SCRW043) inserted from the

front of the door into the strap. Repeat the process for the

other hump strap.

D 4. The landing gear should be positioned as shown in the

sketch above, with the wheel under the L.E.

D 5. Paint the inside of the cockpit light gray (your option).
Trim and install the instrument panel decal.

D 6. Position the canopy on the fuse as shown on the
plans, then lightly trace its edges on the covering with a

ballpoint pen. Trim about a 1/16" wide strip of covering from
around the line you just traced. By removing covering the
canopy will adhere better.

D 7. Before installing the canopy you may wish to add a pilot
figure. We added a block of balsa to the bottom of a
2-1/2" Williams Bros. Pilot to give the pilot the proper height.

D 1. Secure the tail wheel to the tail gear with two 3/32"

wheel collars.

D D 2. Seat the landing gear in the groove on the bottom of
the wing. Secure it with two nylon straps (NYLON36) and
four #2 x 3/8" sheet metal screws per gear.

D D 3. Center the landing gear doors on the landing gear.
Hold a nylon hump strap (NYLON30) on the back of the

gear door and mark the location of the holes in the hump

D 8. Clean the inside of the canopy with window cleaner
and allow it to dry. Use R/C-56* or 6-minute epoxy to glue
the canopy in position.

Note: You should wrap a flat battery pack with 1/4" foam
rubber (HCAQ1000) and install the battery under the
fuel tank.

D 1. Mount three servos in the servo tray following the
manufacturer's recommendations. Install "cross" style horns
on all servos, cutting off the unused arms.

D 2. Slide a silicone retainer over the "hex" end of a nylon

clevis. Screw the clevis 14 turns onto the threaded end of a
36" wire pushrod. Cut the unthreaded end to shorten the

wire to 28". Cut five 3/16" bushings from the plastic inner

pushrod tube provided in the kit. Slide the bushings on the

wire pushrod, spacing them about 3" apart as shown on the
plans. If they are too loose, put a drop of thin CA on the
pushrod wire at each bushing to hold them in place. Locate

the two bushings on both ends so that they will not exit
the pushrod tubes. Trim the backing plate from a nylon
control horn, then clip the clevis to the outer hole of the

horn. Make a second pushrod assembly exactly the same
as the first.

35

D 7. Repeat steps 5 and 6 for the rudder.
D 8. Hook up the throttle using a brass quick connector on

the servo horn. Make sure that the servo does not stall at
either end of its travel.

D 9. Plug an aileron extension into the receiver. Wrap your
receiver in a plastic bag, then wrap with foam rubber.
Secure the foam with a couple of rubber bands.

D 10. Glue a couple of leftover inner pushrod tubes to the

inside of the fuselage to use as antenna guides. Route the

antenna to the back of the radio compartment and out the

side of the fuselage. Anchor the antenna to the top of the
fin or to the tail gear wire with a rubber band. Do not trim
any excess wire from the antenna.

RIGHT WRONG

D 3. Insert the pushrods into the tubes in the fuse, then
hold a Nylon Control Horn (NYLON002) in position on the
elevator (see sketch above for correct alignment). The
pushrod should not be bent and should slide easily in the

tube. Mark the location for the control horn screws on the

control surface. Drill the 3/32" screw holes through the
control surface, then prick a few pin holes into the wood

under the horn's location. Apply a drop or two of thin CA to
the pin holes to strengthen the wood. When cured, screw
the control horn in place with two 2-56 machine screws and
the backing plate. Repeat for the other control surface.

D 11. Mount the receiver switch and charging jack through
the fuselage on the right side of the fuse. We suggest using

a Great Planes Switch/Charging jack mount
(GPMM1000) because of its ease of installation and

tidy appearance.

The photo shows a 2-Stroke setup

(Refer to this photo when performing steps 5 thru 11)

D 4. Connect the receiver to the servos, switch and battery.
Turn on your transmitter and receiver, then center the
elevator and rudder servos. Be sure that the trim levers

are centered.

D 5. Center the elevator, then mark the pushrod where it
crosses the outside servo horn hole. Enlarge the servo
horn hole with a 5/64" drill bit.

D 6. Make a 90° bend in the pushrod on your mark. Then
insert it through the enlarged hole in the servo horn. Secure
it in place with a Nylon Faslink"" Pushrod Connector.

D 12. Plug the aileron servo into the receiver and center
the servo wheel. Slide a silicone retainer over the "hex" end

of a nylon clevis. Screw the clevis 14 turns onto the
threaded end of a 12" threaded wire. Trim the backing plate
from a nylon control horn, then clip the clevis to the third
hole from the top. Attach the control horn following the
same procedure used for installing the control horn on the
elevator. Center the aileron, then mark the pushrod where it
crosses the outside hole on the bellcrank. Make a 90° bend
in the pushrod on your mark. Then insert it through the hole
in the bellcrank. Secure it in place with a nylon Faslink
Pushrod Connector.

36

4-CHANNEL RADIO SETUP

(STANDARD MODE 2)

ELEVATOR MOVES UP

RIGHT AILERON MOVES UP
LEFT AILERON MOVES DOWN

RUDDER MOVES RIGHT

CARBURETOR WIDE OPEN

CONTROL SURFACE THROWS

We recommend the following control surface throws:
NOTE: 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.

High Rate Low Rate

ELEVATOR: 1/2" up 5/16" up

5/8" down 3/8" down

RUDDER: 1-3/4" right Same

1-3/4" left Same

AILERONS: 1/4" up 3/16" up

3/8" down 1/4" down

NOTE: If your radio does not have "dual rates," then set
up the control surfaces to move between the high rate

and low rate throws

NOTE The balance and surface throws for this aircraft
have been extensively tested. We are confident that
they represent the settings at which the Corsair 40 flies
best. Please set up your aircraft to the specifications
listed above. If, after a few flights, you would like to
adjust the throws to suit your tastes, that's fine. Too
much throw can force the plane into a stall, so
remember, "more is not better."

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

D 1. Accurately mark the balance point on the top of the
wing on both sides of the fuselage The balance point is

shown on the plan (CG), and is located 3-1/2" back from

the leading edge as shown in the sketch and on the plans

Hint: Use the full-size fuse plan to help you accurately

locate the proper balance point This is the balance point at
which your model should balance for your first flights Later,
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 arrow-like tracking, but it may then require more speed
for takeoff and make it more difficult to slow down for

landing Moving the balance aft makes the model more
agile with a lighter and 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.

D 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.

D 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 it. If the nose drops, it is
"nose heavy" and you must add weight* to the tail to
balance it NOTE: Nose weight may be easily installed by
using a "spinner weight" or gluing lead weights into the
engine compartment Tail weight may be added by using
Great Planes (GPMQ4485) "stick-on" lead weights and later
if the balance proves to be OK, you can open the fuse
bottom and glue these 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.

37

Charge the batteries

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 manufacturer.

Find a safe place to fly

The best place to fly your R/C model is an AMA

(Academy of Model Aeronautics) chartered club field Ask
your hobby shop dealer if there is such 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 also
can tell you the name of a club in your area We

recommend that you join AMA and a local club so you can

have a safe place to fly and have insurance to cover you in
case of a flying accident (The AMA address is listed on
page 3 of this instruction book)

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

Ground check the model

If you are not thoroughly familiar with the operation of
R/C models, ask an experienced modeler to check to see
that you have the radio installed correctly and that all the
control surfaces do what they are supposed to The engine
operation also must be checked and the engine "broken-in"
on the ground by running the engine for at least two
tanks of fuel Follow the engine manufacturer's
recommendations for break-in. Check to make sure all
screws remain tight, that the hinges are secure and that the
prop is on tight.

Range check your radio

Wherever you do fly, you need to check the operation
of the radio before every time you fly This means with the
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 Have someone
help you Have them stand by your model and, while you
work the controls, tell you what the various control surfaces
are doing

Repeat this test with the engine running at various
speeds with an assistant holding the model If the control
surfaces are not always acting correctly, do not fly! Find

and correct the problem first

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

Use a "chicken stick" device 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

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 airport 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

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

Engine safety precautions
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 Therefore do not run the engine in a closed

room or garage.

5 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.

38

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.

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 Corsair 40 is a great flying sport
airplane that flies smoothly and predictably, yet is highly
maneuverable Compared to other sport planes, its flight
characteristics are quite docile and forgiving It does not,
however, have 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 help you with your first flights

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

speed as your runway will permit before lifting off, as this
will give you a safety margin in case of a "flame-out" When
you first advance the throttle and the tail begins to lift, the
plane will start to turn left (a characteristic of all
"taildraggers") Be ready for this, and correct by applying
sufficient right rudder to hold it straight down the runway
The left-turning tendency will go away as soon as the tail is
up and the plane picks up speed Be sure to allow the tail
to come up Depending on the surface you are flying from,
you will need to apply very little to no up elevator until flying
speed is obtained Don't hold the tail on the ground with too
much up elevator, as the Corsair will become airborne
prematurely and will possibly stall When the plane has
sufficient flying speed, lift off by smoothly applying up
elevator (don't "jerk" it off to a steep climb'), and climb
out gradually

CAUTION (THIS APPLIES TO ALL R/C
AIRPLANES) If, while flying, you notice any unusual
sounds, such as a low-pitched "buzz," this may be an
indication of 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 will indicate which
surface fluttered), and make sure all pushrod
linkages are slop-free If it fluttered once, it probably
will 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 pushrod wire 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 aileron, excessive
"play" or "backlash" in servo gears, and insecure
servo mounting

FLYING: We recommend that you take it easy with your
Corsair 40 for the first several flights, gradually "getting
acquainted" with this great sport model as your engine gets
fully broken-in Add and practice one maneuver at a time,
learning how she behaves in each For ultra-smooth flying
and normal maneuvers, we recommend using the "low rate"
settings as listed on page 32 "High rate" elevator may be
required for crisp snap rolls and spins Speed is the key to

good knife-edge performance.

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.

TAKEOFF: If you have dual rates on your transmitter, set

the switches to "high rate" for takeoff, especially when
taking off in a crosswind Although this model has good low
speed characteristics, you should always build up as much

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 landings,
plan to land slightly faster than stall speed and on the main
wheels, as this is the easiest way to land your Corsair
Later, with a little technique, you will find you can make
slow, 3-point landings.

Have a ball! But always stay in control and fly in a

safe manner.

39

2-View Drawing

Use this two-view drawing to
design your trim scheme for your
Corsair 40.