Great Planes GPMA1242 User Manual

WARRANTY

Great Planes®Model Manufacturing Co. guarantees this kit to be free from defects in both material and workmanship at the date of purchase.
This warranty does not cover any component parts damaged by use or modification. In no case shall Great Planes’ liability exceed the
original cost of the purchased kit. Fur ther, 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 buyer is not prepared to accept the liability associated with the use of this product, the buyer is advised to return this kit
immediately in new and unused condition to the place of purchase.

To make a warranty claim send the defective part or item to Hobby Services at the address below:

Hobby Services

3002 N. Apollo Dr., Suite 1

Champaign, IL 61822

USA

Include a letter stating your name, return shipping address, as much contact information as possible (daytime telephone number, fax number,
e-mail address), a detailed description of the problem and a photocopy of the purchase receipt. Upon receipt of the package the problem will
be evaluated as quickly as possible.

READ THROUGH THIS MANUAL BEFORE STARTING
CONSTRUCTION.IT CONT AINS IMPOR T ANT INSTR UCTIONS
AND WARNINGS CONCERNING THE ASSEMBLY AND
USE OF THIS MODEL.

GPMZ0188 for GPMA1242 V1.1© Copyright 2006

Champaign, Illinois

[phone], Ext 5

[e-mail]

INSTRUCTION MANUAL

Wingspan: 57 in [1450 mm]
Wing Area: 924 sq in [59.6 dm2]
Weight: 7.5 – 8.5 lb [3400 – 3855 g]
Wing Loading: 19 – 21 oz/sq ft [57 – 65 g/dm2]
Length: 53 in [1345 mm]
Radio: 4-channel with four 54 oz-in [3.9kg-cm] servos
Engine: .60 – .75 cu in [10 – 12.5 cc] two-stroke,

.70 – .91 cu in [11.5 – 15 cc] four-stroke

2

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

AMA...................................................................................2

SCALE COMPETITION.....................................................2

SAFETY PRECAUTIONS..................................................3

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

Radio Equipment .........................................................3

Engine Recommendations..........................................3

Building Stand.............................................................4

Pilot .............................................................................4

ADDITIONAL ITEMS REQUIRED.....................................4

Required Hardware & Accessories.............................4

Adhesives & Building Supplies....................................4

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

IMPORTANT BUILDING NOTES ......................................4

COMMON ABBREVIATIONS............................................5

ORDERING REPLACEMENT PARTS ..............................5

KIT INSPECTION..............................................................6

KIT CONTENTS ................................................................6

PREPARATIONS ...............................................................7

ASSEMBLE THE WINGS..................................................7

Install the Ailerons & Servos.......................................7

Join the Wing Panels.................................................10

BUILD THE FUSELAGE..................................................11

Assemble the Tail Section .........................................11

Install the Tail Linkages & Servos .............................13

Install the Landing Gear............................................15

Install the Cabane Struts ...........................................17

Install the Engine & Fuel Tank...................................17

Install the Throttle Servo...........................................19

Install the Receiver & Battery....................................20

FINISH THE MODEL .......................................................21

Attach the Cowl & Canopy........................................21

Attach the Wings.......................................................22

Optional: Assemble the Carrying Handle ..................24

Apply the Decals .......................................................24

GET THE MODEL READY TO FLY .................................25

Check the Control Directions ....................................25

Set the Control Throws..............................................25

Balance the Model (C.G.)..........................................26

Balance the Model Laterally ......................................26

PREFLIGHT.....................................................................26

Identify Your Model ....................................................26

Charge the Batteries .................................................26

Balance the Propellers..............................................27

Ground Check...........................................................27

Range Check.............................................................27

ENGINE SAFETY PRECAUTIONS.................................27

AMA SAFETY CODE (excerpts)....................................28

CHECK LIST ...................................................................28

FLYING ............................................................................29

Fuel Mixture Adjustments..........................................29

Takeoff.......................................................................29

Flight..........................................................................29

Landing......................................................................29

ENGINE HEAD TEMPLATE ....................Back Cover Page

For the latest technical updates or manual corrections to the
Super Skybolt ARF visit the Great Planes web site at
www.greatplanes.com. Open the “Airplanes” link, then
select the Super Skybolt ARF. If there is new technical
information or changes to this model a “tech notice” box will
appear in the upper left corner of the page.

We urge you to join the AMA (Academy of Model
Aeronautics) and a local R/C club.The AMA is the governing
body of model aviation and membership is required to fly at
AMA clubs.Though joining the AMA provides many benefits,
one of the primary reasons to join is liability protection.
Coverage is not limited to flying at contests or on the club
field. It even applies to flying at public demonstrations and
air shows.Failure to comply with the Safety Code (excerpts
printed in the back of the manual) may endanger insurance
coverage.Additionally, training programs and instructors are
available at AMA club sites to help you get started the right
way. There are over 2,500 AMA chartered clubs across the
country. Contact the AMA at the address or toll-free phone
number below.

IMPORTANT!!! Two of the most important things you can do
to preserve the radio controlled aircraft hobby are to avoid
flying near full-scale aircraft and avoid flying near or over
groups of people.

Though the Great Planes Super Skybolt is an ARF and may not
have the same level of detail as an “all-out” scratch-built
competition model, it is a scale model nonetheless and is
therefore eligible to compete in the Fun Scale class in AMA
competition (we receive many f a vor able reports of Great Planes
ARFs in scale competition!). In Fun Scale, the “builder of the
model” rule does not apply.To receive the five points for scale
documentation, the only proof required that a full-size aircraft of
this type in this paint/markings scheme did exist is a single sheet
such as a kit box cov er from a plastic model, a photo, or a profile
painting, etc. If the photo is in black and white, other written
documentation of color must be provided. Contact the AMA for
a rule book with full details.

SCALE COMPETITION

Academy of Model Aeronautics

5151 East Memorial Drive

Muncie, IN 47302

Tele: [phone]

Fax [phone]

Or via the Internet at:

http://www.modelaircraft.org

AMA

INTRODUCTIONTABLE OF CONTENTS

If you would like photos of the full-size Super Skybolt for
scale documentation, or if you would like to study the photos
to add more scale details, photo packs are available from:

Bob’s Aircraft Documentation

3114 Y uk on Ave

Costa Mesa, CA 92626

Telephone: [phone]

Fax:[phone]

E-mail: www.bobsairdoc.com

1.Your Super Skybolt ARF should not be considered a toy,
but rather a sophisticated, working model that functions very
much like a full-size airplane. Because of its performance
capabilities, the Super Skybolt ARF, if not assembled and
operated correctly, could possibly cause injury to yourself or
spectators and damage to property.

2. You must assemble the model 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 the written instructions should be considered
as correct.

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

4. You must use an R/C radio system that is in first-class
condition, and a correctly sized engine and components
(servos, receiver battery, etc.) throughout the building process .

5.You must correctly install all R/C and other components so
that the model operates correctly on the ground and in the air .

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

7. If you are not an experienced pilot or have not flown this
type of model before, we recommend that you get the
assistance of an experienced pilot in your R/C club for your
first flights.If you’ re not a member of a club, your local hob by
shop has information about clubs in your area whose
membership includes experienced pilots.

8.While this kit has been flight tested to exceed normal use,
if the plane will be used for extremely high-stress flying,
such as racing, or if an engine larger than one in the
recommended range is used, the modeler is responsible for
taking steps to reinforce the high-stress points and/or
substituting hardware more suitable for the increased stress .

9. WARNING: The cowl and wheel pants included in this kit
are made of fiberglass, the fibers of which may cause eye,
skin and respiratory tract irritation. Never blow into a part
(wheel pant, cowl) to remove fiberglass dust, as the dust will
blow back into your eyes. Always wear safety goggles, a
particle mask and rubber gloves when grinding, drilling and
sanding fiberglass parts. Vacuum the parts and the work
area thoroughly after working with fiberglass parts.

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

This is a partial list of items required to finish the Super Skybolt
ARF that may require planning or decision making before
starting to build. Order numbers are provided in parentheses.

The Super Skybolt ARF requires a 4-channel radio system with
four 54 oz.-in. [3.9 kg-cm] minimum servos and one standard
torque servo for the throttle.In addition, two 9" [229 mm] servo
extensions are required for the aileron servos .If y ou are using a
radio system that does not have mixing functions, a Y-harness
will also be required to connect the aileron servos to the receiver .
Below is a list of radio equipment used to build the Super Skybolt
ARF shown in the pictures in this manual:

❏ (4) Futaba

®

S9001 Servo Aircraft Coreless BB (FUTM0075)

❏ (1) Futaba S3003 Servo Standard (FUTM0031)
❏ (2) Futaba 9" Servo Extension J (FUTM3910)

The recommended engine size range for the Super Skybolt
ARF is .60 – .75 cu in [10-12.5 cc] two-stroke or .70 – .91 cu
in [11.5-15 cc] four-stroke. If an engine in the upper end of
the size range is used, remember that this is a scale model
that is intended to fly at scale-like speeds, so throttle
management should be practiced.

Engine Recommendations

Radio Equipment

DECISIONS YOU MUST MAKE

We, as the kit manuf acturer, provide you with a top quality ,
thoroughly tested kit and instructions, but ultimately the
quality and flyability of your finished model depends on
how you build it; therefore, we cannot in any way
guarantee the performance of your completed model, and
no representations are expressed or implied as to the
performance or safety of your completed model.

PRO TECT YOUR MODEL,YOURSELF

& OTHERS...FOLLOW THESE

IMPORTANT SAFETY PRECAUTIONS

3

A building stand or cradle comes in handy during the build.We
use the Robart Super Stand II (ROBP1402) for all our projects
in R&D , and it can be seen in pictures throughout this manual.

The Super Skybolt ARF does not include a pilot figure.If you
plan to install one, the pilot can be attached during the build,
or later on since the canopy is remov able.We suggest using
the Great Planes pilot figure (GPMA2475).

This is the list of hardware and accessories required to finish the
Super Skybolt ARF.Order numbers are provided in parentheses.

❏ #64 Rubber bands (1/4 lb [113 g] box – HCAQ2020)
❏ 3' [900mm] Standard silicone fuel tubing (GPMQ4131)
❏ R/C foam rubber (1/4" [6 mm] – HCAQ1000, or 1/2"

[13 mm] – HCAQ1050)

This is the list of Adhesives and Building Supplies that are
required to finish the Super Skybolt ARF.

❏ 1/2 oz.[15g] Thin Pro

™

CA (GPMR6001)

❏ Pro 30-minute epoxy (GPMR6047)
❏ Drill bits: 1/16" [1.6 mm], 5/64" [2 mm], 3/32" [2.4 mm],

7/64" [2.8 mm] 11/64" [4.4 mm], 1/4" [6.4 mm]

❏ 8-32 Tap and drill set (GPMR8103)
❏ Tap handle (GPMR8120)
❏ Stick-on segmented lead weights (GPMQ4485)
❏ #1 Hobby knife (HCAR0105)
❏ #11 Blades (5-pack – HCAR0211)
❏ Small T-pins (100 – HCAR5100)
❏ Denatured alcohol (for epoxy clean up)
❏ Hayes Small Clamp 1-3/8" [26 mm] (HAYR1104)
❏ Petroleum jelly

Here is a list of optional tools mentioned in the manual and
other items that will help you build the Super Skybolt ARF.

❏ Great Planes Heat-Shrink Tubing Assor tment

(12 – GPMM1070)

❏ Top Flite

®

MonoKote®sealing iron (TOPR2100)

❏ Top Flite Hot Sock

™

iron cover (TOPR2175)

❏ Top Flite MonoKote trim seal iron (TOPR2200)
❏ Top Flite MonoKote heat gun (TOPR2000)
❏ Hobbico

®

60 watt soldering iron (HCAR0776)

❏ Pro 6-minute epoxy (GPMR6045)
❏ 2 oz.[57 g] Spray CA activator (GPMR6035)
❏ 4 oz.[113 g] Aerosol CA activator (GPMR634)
❏ CA applicator tips (HCAR3780)
❏ CA debonder (GPMR6039)
❏ Epoxy brushes (6 – GPMR8060)
❏ Mixing sticks (50 – GPMR8055)
❏ Mixing cups (GPMR8056)
❏ Builder’s Tr iangle Set (HCAR0480)
❏ 36" Metal ruler (HCAR0475)
❏ Pliers with wire cutter (HCAR0630)
❏ Hobbico Duster

™

can of compressed air (HCAR5500)

❏ Masking tape (TOPR8018)
❏ Threadlocker

™

thread-locking compound (GPMR6060)

❏ Switch & Charge Jack Mounting Set (GPMM1000)
❏ Panel Line Pen (TOPQ2510)
❏ Rotary tool such as Dremel

®

❏ Rotary tool reinforced cut-off wheel (GPMR8200)
❏ Servo horn drill (HCAR0698)
❏ Dead Center

™

Engine Mount Hole Locator (GPMR8130)

❏ Precision Magnetic Prop Balancer (TOPQ5700)
❏ Prop Reamer (GPMQ5005)

• There are two types of screws used in this kit:

• Sheet Metal Screws (SMS) are designated by a
number and a length. For example #6 x 3/4" [19 mm]

This is a #6 screw that is 3/4" [19 mm] long.

• Socket Head Cap Screws (SHCS) are designated by a

number, threads per inch, and a length. For example
4-40 x 1-1/2" [38 mm]

This is a number four screw that is 1-1/2" [38 mm] long

with forty threads per inch.

IMPORTANT BUILDING NOTES

Optional Supplies & Tools

Adhesives & Building Supplies

Required Hardware & Accessories

ADDITIONAL ITEMS REQUIRED

Pilot

Building Stand

4

• When you see the term

test fit

in the instructions, it
means that you should first position the part on the
assembly without using any glue, then slightly modify or

custom fit

the part as necessar y for the best fit.

• Whenever the term

glue

is written you should rely upon
your experience to decide what type of glue to use.When a
specific type of adhesive works best for that step, the
instructions will make a recommendation.

• Whenever just

epoxy

is specified, you may use either
30-minute (or 45-minute) epoxy or 6-minute epoxy. When
30-minute epoxy is specified it is highly recommended that
you use only 30-minute (or 45-minute) epoxy, because you
will need the working time and/or the additional strength.

•

Photos

and

sketches

are placed before the step they
refer to. Frequently you can study photos in following steps
to get another view of the same parts.

• The Super Skybolt ARF is factory-covered with Top Flite
MonoKote film. Should repairs ever be required, MonoKote
can be patched with additional MonoKote purchased
separately. MonoKote is packaged in six-foot rolls, but some
hobby shops also sell it by the foot. If only a small piece of
MonoKote is needed for a minor patch, perhaps a fellow
modeler would give you some. MonoKote is applied with a
model airplane covering iron, but in an emergency a regular
iron could be used. A roll of MonoKote includes full
instructions for application.Following are the colors used on
this model and order numbers for six foot rolls.

Metallic Blue – TOPQ0402

Metallic Gold – TOPQ0404

Metallic Red – TOPQ0405

White – TOPQ0204

• The stabilizer and wing incidences and engine thrust
angles have been factory-built into this model. However,
some technically-minded modelers may wish to check these
measurements anyway.To view this information visit the web
site at www.greatplanes.com and click on “Technical Data. ”
Due to manufacturing tolerances which will have little or no
effect on the way your model will fly, please expect slight
deviations between your model and the published values.

Fuse = Fuselage

Stab = Horizontal Stabilizer

Fin = Ver tical Fin

LE = Leading Edge

TE = Trailing Edge
LG = Landing Gear
Ply = Plywood

" = Inches

mm = Millimeters

SHCS = Socket Head Cap Screw

Replacement parts for the Great Planes Super Skybolt ARF
are available using the order numbers in the Replacement
Parts List that follows. The fastest, most economical service
can be provided by your hobby dealer or mail-order company.

To locate a hobby dealer, visit the Hobbico web site at
www.hobbico.com. Choose “Where to Buy” at the bottom
of the menu on the left side of the page. Follow the
instructions provided on the page to locate a U.S., Canadian
or International dealer.

Parts may also be ordered directly from Hobby Services by
calling [phone], or via facsimile at [phone],
but full retail prices and shipping and handling charges will
apply. Illinois and Nevada residents will also be charged
sales tax. If ordering via fax, include a Visa®or MasterCard

®

number and expiration date for payment.
Mail parts orders and payments by personal check to:

Hobby Services

3002 N. Apollo Drive, Suite 1

Champaign, IL 61822

Be certain to specify the order number exactly as listed in
the Replacement Parts List. Payment by credit card or
personal check only; no C.O.D.

If additional assistance is required for any reason contact Product
Support by e-mail at [e-mail],
or by telephone at [phone].

Replacement Parts List

Order Number Description How to Purchase

Missing pieces Contact Product Support
Instruction manual Contact Product Support

Full-size plans Not available
GPMA2920 Top Wing Set Contact Hobby Supplier
GPMA2921 Bottom Wing Set Contact Hobby Supplier
GPMA2922 Fuse Set Contact Hobby Supplier
GPMA2923 Tail Set Contact Hobby Supplier
GPMA2924 Cabane Struts Contact Hobby Supplier
GPMA2925 Interplane Struts Contact Hobby Supplier
GPMA2926 Landing Gear Contact Hobby Supplier
GPMA2927 Wheel Pants Contact Hobby Supplier
GPMA2928 Cowl Contact Hobby Supplier
GPMA2929 Canopy Contact Hobby Supplier
GPMA2930 Decal Sheet Contact Hobby Supplier

ORDERING REPLACEMENT PARTS

COMMON ABBREVIATIONS

5

6

Before starting to build, take an inventory of this kit to make sure it is complete, and inspect the parts to make sure they
are of acceptable quality. If any parts are missing or are not of acceptable quality, or if you need assistance with assembly ,
contact Product Support. When reporting defective or missing parts, use the part names exactly as they are written in
the Kit Contents list.

Great Planes Product Support

3002 N. Apollo Drive, Suite 1

Champaign, IL 61822

Telephone: [phone], ext. 5

Fax:[phone]

E-mail: [e-mail]

KIT INSPECTION

(1) 5/16"-24 Spinner Adapter
(4) Wing Strut Pegs
(1) 2-1/2" [64 mm] Aluminum Spinner
(1) Outer Pushrod Tube
(1) Anti-Rotation Pin
(1) Radio T ray
(1) Hook and Loop Material
(1) .60 – 1.20 Engine Mount
(2) 5/32" [4 mm] Axle Shafts
(1) Screw-Lock Pushrod Connector
(1) Nylon Retainer (for Screw-Lock

Pushrod Connector)
(2) 5/16"-24 Nylon Lock Nuts
(6) 4-40 Nylon Lock Nuts
(5) Large Nylon Control Horns
(4) Small Nylon control Horns

(2) 1/4-20 Nylon Wing Bolts
(8) 2-56 Nylon Clevises
(12) CA Hinges
(2) #4 Flat Washers
(8) #2 Flat Washers
(8) #8 Flat Washers
(8) #8 Lock Washers
(4) 6-32 x 1-1/2" [38 mm] Threaded Studs
(4) 6-32 Knurled Nuts
(1) 4-40 x 1/8" [3 mm] SHCS
(6) Nylon FasLinks
(8) Silicone Clevis Retainers
(6) #4 x 1/2" [13 mm] SMS
(6) 6-32 x 1/4" [6 mm] SHCS
(14) #2 x 3/8" [9.5 mm] SMS
(12) 4-40 x 3/8" [9.5 mm] Phillips Screws

(2) 4-40 x 1/2" [13 mm] SHCS
(14) 2-56 x 1/2" [13 mm] Phillips Screws
(8) 8-32 x 1" [25 mm] SHCS
(8) #2 x 1/2" [13 mm] SMS
(4) 2-56 x 12" [305 mm] Threaded One-

End Pushrods

(4) 2-56 x 36" [914 mm] Threaded One-

End Pushrods

(6) 5/32" [4 mm] Wheel Collars

Kit Contents (not photographed)

KIT CONTENTS

1

5

4

3

12

11

2

8

Kit Contents

1. Cowl

2. Fuselage

3. Canopy

4. Bottom Left Wing Panel w/Aileron

5. Bottom Right Wing Panel w/Aileron

6. Top Left Wing Panel w/Aileron

7. Top Right Wing Panel w/Aileron

8. Horizontal Stabilizer & Elevators

9. Tailwheel Assembly

10. Vertical Fin & Rudder

11. Landing Gear

12. Main Wheels (2)

13. Aluminum Joiner Plate

14. Wheel Pants (L&R)

15. Wing Struts (2)

16. Wing Bolt Plate

17. Cabane Struts (4)

18. Cabane Strut Braces (2)

19. Top Wing Joiner

20. Carry Handle Pieces (4)

21. Bottom Wing Joiner (2)

22. Fuel Tank

23. Servo Mounting Blocks (4)

6

7

10

14

9

15

17

18

19

16

20

21

23

22

13

❏ 1. If you have not done so already, remove the major

parts of the kit from the box and inspect for damage. If any
parts are damaged or missing, contact Product Suppor t at
the address or telephone number listed in the

“Kit

Inspection”

section on page 6.

❏ 2. Carefully remove the tape and separate all the control

surfaces. Use a covering iron with a covering sock to tighten
the covering if necessary.Apply pressure over sheeted areas
to thoroughly bond the covering to the wood.

Do the left top and bottom wing first so your work
matches the photos the first time through.You can do
one wing at a time, or work on them together.

❏ ❏ 1. Locate six 3/4" x 1" [19 x 25 mm] CA hinges. Test fit

the hinges into the pre-cut hinge slots in the ailerons and
wing panels of both top and bottom wings. Enlarge the slots

if necessary so that the hinges will fit half-way in.With a sharp
blade in your hobby knife, trim the covering 1/16" [1.6 mm]
away from the hinge slots as shown. Remove the hinges and
drill a 3/32" [2.4 mm] hole 1/2" [13 mm] deep in the center of
each hinge slot.This will allow the CA glue to wick across the
entire hinge surface.

❏ ❏ 2.Insert the hinges half-way into the ailerons.Pins can

be used to keep the hinges centered. Fit the ailerons to the
wing panels by sliding the hinges into their mating slots at an
angle. With the aileron pressed into position, deflect it
downward and apply six drops of thin CA glue to the center
of each hinge.Flip the wings over and apply CA to the other
side of the hinges.

❏ ❏ 3.Remove the servo hatc h from the bottom wing panel

and trim the covering from the servo arm cutout.

Install the Ailerons & Servos

ASSEMBLE THE WINGS

PREPARATIONS

7

❏ ❏ 4. Cut three arms from a four-arm servo horn and

install it onto the servo 90 degrees to the servo case.
Enlarge the outer hole of the servo horn using a 5/64"
[2 mm] drill bit.

❏ ❏ 5. Position the servo onto the underside of the servo

hatch so that the servo horn is centered in the cutout and
the servo is square to the hatch. Place a servo mounting
block onto each side of the servo up against the mounting
tabs and mark their locations on the hatch.

❏ ❏ 6. Mix up a small batch of epoxy to glue the servo

mounting blocks to the servo hatch using the marks you
made as a guide. Allow the epoxy to cure undisturbed.

❏ ❏ 7. Drill 1/16" [1.6 mm] holes for the servo mounting

screws.Thread a mounting screw into each hole and back it
out. Add a couple drops of thin CA to each hole to harden
the wood.Secure the servo to the hatch using the hardware
that came with the servo.

❏ ❏ 8. Attach a 9" [229 mm] servo extension to the aileron

servo and secure it with a piece of heat-shrink tubing or
tape. Tie the string from inside the opening for the aileron
servo to the end of the servo extension. Remove the tape
holding the other end of the string to the wing root rib and
pull the servo wire and extension through the wing.

❏ ❏ 9.Put the servo hatch into position and drill 1/16" [1.6 mm]

holes at each corner of the hatch. Be sure you are drilling
through the plywood servo hatch frame in the wing.Thread
a #2 x 3/8" [9.5 mm] SMS screw into each hole and back it
out.Add a couple drops of thin CA glue to each hole.Secure
the hatch with four #2 x 3/8" [9.5 mm] SMS screws. If the
servo hatch does not fit completely flush with the wing
sheeting, you may need to lightly sand down the servo
mounting blocks.

8

❏ ❏ 10. Using a pushrod as a guide, place a large control

horn onto the aileron offset 1/8" [3 mm] towards the wing tip
and make a mark at each control horn mounting hole. Drill
1/16" [1.6 mm] holes at the mark.

❏ ❏ 11.Thread a #2 x 1/2" [13 mm] SMS screw into each

hole and back it out. Add a couple drops of thin CA to the
holes to harden the wood. Secure the control hor n with two
#2 x 1/2" [13 mm] SMS screws.

❏ ❏ 12. Install a silicone clevis retainer and a nylon clevis

onto a 12" [305 mm] pushrod.Thread the cle vis 14 complete
turns onto the pushrod.

❏ ❏ 13. Connect the clevis to the third hole of the aileron

control horn. Line the pushrod up with the servo horn while
holding the aileron in the neutral position.Make a mark on the
pushrod where it intersects the outer hole of the servo horn.

❏ ❏ 14. Make a 90° bend at the mark and cut off the excess

pushrod 1/4" [6 mm] beyond the bend.Hook the bend in the
wire to the outer hole of the servo horn and secure it with a
nylon FasLink. Slide the silicone clevis retainer over the
clevis up to the control horn.

❏ 15. Repeat steps 1-14 for the right wing panels.

9

Servo Arm

❏ 1. Trim the covering from the aileron servo lead holes

located on top of the bottom wing panels near the root ribs.
Feed the servo leads up through these holes.

❏ 2.Mix up a small batch of epoxy and glue together the two

bottom plywood wing joiner pieces. Wipe away excess
epoxy with a paper towel and denatured alcohol.

❏ 3.Make a center mark on the bottom wing joiner and test

fit it into both joiner pockets in the bottom wing panels. Be
sure that the joiner fits all the way into the center mark on
both panels.

Use a bar sander with coarse sandpaper to true the edges
and remove any excess hardened epoxy from the wing
joiner prepared earlier. Without using any glue,
temporarily join the wings with the joiner.Make adjustments
as necessary for a good fit. Note: The dihedral angle is
factory-set and determined by the angle of the joiner and the
joining ribs on the ends of the wing halves. However, you
may confirm the dihedral by placing one wing panel flat on
the workbench and measuring the distance between the
bottom of the rib on the end of the other panel and the
bench. The distance should be 2-1/8" [54 mm], but small
variances are acceptable.If the wing doesn’t fit well or if you
can’t get close enough to the dihedral specified, there may
be excess glue inside the wing or irregularities on the joiner.
Use coarse sandpaper to true the edges and bevel the
corners of the joiner and/or use a hobby knife to remov e an y
glue from the joiner openings in the ribs on the end of the
wing halves.

❏ 4. Use 30-minute epoxy to join the two bottom wing

panels together. Apply epoxy to one half of the joiner and
insert it into one of the panels. Coat the other half of the
joiner as well as the two root ribs and slide the panels
together. Wipe away excess epoxy with alcohol and use
masking tape to hold the panels.We used a small clamp to
align the trailing edge as shown in the picture.

Join the Wing Panels

10