Great Planes GPMA1303 User Manual

WARRANTY

Great Planes®Model Manufacturing Co.

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

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

If the 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 INSTRUCTIONS
AND WARNINGS CONCERNING THE ASSEMBLY AND
USE OF THIS MODEL.

GPMZ0204 for GPMA1303 V1.1 Entire Contents © Copyright 2006

Champaign, IL

[phone], Ext. 5

[e-mail]

INSTRUCTION MANUAL

Wingspan: 81 in [2060mm]
Wing Area: 1000 sq in [64.5 dm

2

]

Weight: 13-14 lb [5900–6350g]
Wing Loading: 29–32oz/sq ft [88–98g/dm

2

]

Length: 62.5 in [1590mm]
Radio: 6-channel with seven servos
Engine: .91 – 1.08 cu in [15–17.5cc] two-stroke or

1.20 cu in [20cc] four-stroke engine

Manufactured under license by Pennzoil-Quaker State Company,
2004; Hobbico, Inc. P.O.Box 9021 Champaign, IL 61826-9021

®

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

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

IMAA...................................................................................................2

SCALE COMPETITION......................................................................3

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

ITEMS REQUIRED.............................................................................3

Hardware & Accessories .............................................................3

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

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

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

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

METRIC/INCH RULER.......................................................................5

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

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

ASSEMBLE THE WING .....................................................................7

Install the Ailerons .......................................................................7

Install the Aileron Servos & Pushrods ........................................8

Assemble the Wing Center-Section..........................................10

Install the Landing Gear, Wheels & Wheel Pants .....................11

ASSEMBLE THE FUSELAGE..........................................................13

Install the Stab, Elevators & Rudder.........................................13

Install the Engine, Fuel Tank & Throttle Servo ..........................14

Mount the Cowl.........................................................................16

Install the Radio System, Purshrods, Control Horns & Tail Wheel........18

Install the Receiver & Battery....................................................21

FINISHING TOUCHES......................................................................21

Apply the Decals.......................................................................22

GET THE MODEL READY TO FLY..................................................22

Check the Control Directions ....................................................22

Set the Control Throws..............................................................23

Balance the Model (C.G.)..........................................................23

Balance the Model Laterally......................................................24

PREFLIGHT......................................................................................24

Identify Y our Model....................................................................24

Charge the Batteries.................................................................24

Balance the Propellers..............................................................24

Ground Check...........................................................................24

Range Check.............................................................................24

ENGINE SAFETY PRECAUTIONS..................................................25

AMA SAFETY CODE (excerpt).......................................................25

IMAA SAFETY CODE (excerpt)......................................................26

CHECK LIST ....................................................................................27

FLYING .............................................................................................27

Fuel Mixture Adjustments..........................................................27

Takeoff.......................................................................................28

Flight..........................................................................................28

Landing......................................................................................28

ENGINE MOUNTING TEMPLATE....................................................28

Thank you for your purchase of this aerobatic classic, Art
Scholl’s “Super Chipmunk!” We are proud of its great looks
and are sure that you will be proud to bring it to the field.The
fiberglass fuselage allows us to create a strong, good­looking model that replicates the actual aircraft in great
detail.This airplane is capable of recreating all of the classic
air show maneuvers that Art performed for many years on
the air show circuit.We hope you enjoy the model as much
as we have enjoyed bringing it to you.

For the latest technical updates or manual corrections to the
Super Chipmunk 1.20 ARF, visit the Great Planes web site
at

www.greatplanes.com

. Open the “Airplanes” link, then
select the Super Chipmunk 1.20 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 ev en 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 countr y. Contact the AMA
at the address or toll-free phone number below:

IMPORTANT!!! Tw o 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.

The Great Planes Super Chipmunk 1.20 ARF is an excellent
sport-scale model and is eligible to fly in IMAA events.The
IMAA (International Miniature Aircraft Association) is an
organization that promotes non-competitive flying of giant­scale models. If you plan to attend an IMAA event, obtain a
copy of the IMAA Safety Code b y contacting the IMAA at the
address or telephone number below, or by logging on to
their web site.

IMAA

205 S. Hilldale Road

Salina, KS 67401

[phone]

www.fly-imaa.org/imaa/sanction.html.

IMAA

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

INTRODUCTION

TABLE OF CONTENTS

2

Though the Great Planes Super Chipmunk 1.20 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 favorable
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 cover 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.

If you would like photos of the full-size Super Chipmunk 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 Av e

Costa Mesa, CA 92626

Telephone: [phone]

Fax:[phone]

E-mail:

www.bobsairdoc.com

1.Your Super Chipmunk 1.20 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 Chipmunk 1.20 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
(fuel tank, wheels, 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, y our local hobby
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, the modeler is responsible for taking steps
to reinforce the high stress points.

9. WARNING:The cowl, fuselage 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 the list of hardware and accessories required to
finish the Great Planes Super Chipmunk 1.20 ARF. Order
numbers are provided in parentheses.

❏ .91 cu in [15cc] Two-stroke or 1.20 cu in [20cc] four-

stroke engine

❏ Propeller and spare propellers suitable for your engine
❏ 6-Channel radio
❏ Servos: (1) 35 oz-in servo (throttle), (5) 50 oz-in servos

(ailerons, flaps, elevator), (1) 80 oz-in servo (rudder)

❏ (2) – 2" [300mm] Servo extension (HCAM2711 for Futaba

®

)

❏ (2) – Y-harness (HCAM2751 for Futaba)

Hardware & Accessories

ITEMS REQUIRED

We, as the kit manufacturer, 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,Y OURSELF

& OTHERS...FOLLOW THESE

IMPORTANT SAFETY PRECAUTIONS

SCALE COMPETITION

3

In addition to common household tools and hobby tools, this
is the “short list” of the most important items required to
build the Super Chipmunk ARF.

Great Planes Pro™CA and

Epoxy glue are recommended.

❏ 1/2 oz. [15g] Thin Pro CA (GPMR6001)
❏ 1 oz. [30g] Medium Pro CA+ (GPMR6008)
❏ Pro 30-minute epoxy (GPMR6047)
❏ Pro 6-minute epoxy (GPMR6045)
❏ Drill bits: 1/16" [1.6mm], 3/32" [2.4mm], 9/64" [3.6mm],

3/16" [4.8mm] and 7/32" [5.6mm].

❏ 8-32 tap and drill set (GPMR8103)
❏ Stick-on segmented lead weights (GPMQ4485)
❏ Silver solder w/flux (GPMR8070)
❏ Microballoons (TOPR1090)
❏ 3' [900mm] standard silicone fuel tubing (GPMQ4131)
❏ R/C foam rubber (1/4" [6mm] – HCAQ1000, or 1/2"

[13mm] – HCAQ1050)

Here is a list of optional tools mentioned in the manual that
will help you build the Super Chipmunk ARF.

❏ 4 oz. [113g] Aerosol CA activator (GPMR634)
❏ R/C-56 canopy glue (JOZR5007)
❏ CA applicator tips (HCAR3780)
❏ CA debonder (GPMR6039)
❏ Epoxy brushes (6, GPMR8060)
❏ Mixing sticks (50, GPMR8055)
❏ Mixing cups (GPMR8056)
❏ Curved-tip canopy scissors for trimming plastic parts

(HCAR0667)

❏ Threadlocker

™

thread locking cement (GPMR6060)

❏ Denatured alcohol (for epoxy clean up)
❏ Rotary tool such as Dremel

®

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

™

Engine Mount Hole Locator (GPMR8130)

❏ AccuThrow

™

Deflection Gauge (GPMR2405)

❏ CG Machine

™

(GPMR2400)

❏ Precision Magnetic Prop Balancer

™

(TOPQ5700)

❏ 21st Century

®

sealing iron (COVR2700)

❏ 21st Century iron cover (COVR2702)

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

a length. For example #6 x 3/4".

This is a number six screw that is 3/4" long.

Machine screws are designated by a number, threads per
inch, and a length – for example, 4-40 x 3/4". SHCS is just

an abbreviation for “socket head cap screw” and that is a
machine screw with a socket head.

This is a number four screw that is 3/4" long with forty

threads per inch.

• 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 or6-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 Chipmunk 1.20 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 giv e 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.

White – TOPQ0204

Missile Red – TOPQ0201

Sapphire Blue – TOPQ0226

• 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 betw een your model and the
published values.

IMPORTANT BUILDING NOTES

Optional Supplies & Tools

Adhesives & Building Supplies

4

5

Replacement parts for the Great Planes Super Chipmunk 1.20 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 Great Planes web site at

www.g

reatplanes.com

. Choose “Where to Buy” at the middle 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. If a
hobby shop is not available, replacement parts may also be ordered from Tower Hobbies at

www.towerhobbies.com

, or by calling toll

free [phone].

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 order ing 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

Or

der Number Description How to Purchase

Missing pieces.......................Contact Product Support

Instruction manual.................Contact Product Support

Full-size plans........................Not available

GPMA2480 Wing Kit
GPMA2481 Fuse Kit
GPMA2483 Tail Set
GPMA2482 Cowl
GPMA2485 Canopy
GPMA2486 Landing Gear
GPMA2484 Wheel Pants
GPMA2487 Tail Wheel
GPMA2488 Decal Set

ORDERING REPLACEMENT PARTS

................

Contact Your Hobby
Supplier to Purchase
These Items

To convert inches to millimeters, multiply inches by 25.4

6

1. Fuselage

2. Engine Mount

3. Servo Tray Parts

4. Fuel Tank

5. Cockpit

6. Pilot

7. Canopy

8. Tail Wheel Assembly

9. Rudder

10. Stab Tubes

11. Stab & Elevators (L&R)

12. Left Wing Panel

13. Wing Center-Section

14. Right Wing Panel

15. Wire Covers

16. Landing Gear Wire

17. Wheels

18. Wheel Pants (L&R)

19. Wing Joiners (1-aluminum,
2-plywood)

Kit Contents (not photographed)

Kit Contents

(6) 4-40 Threaded Metal Clevis
(5) 4-40 Solder Clevis
(2) Screw-Lock Pushrod Connector
(8) 2-56 Threaded Metal Clevis
(6) 4-40 Nut
(4) 8-32 Blind Nuts
(8) 2-56 Nut
(4) 1/4-20 Blind Nut
(8) Large Nylon Control Horn
(2) 1/4-20 Nylon Bolt
(2) Nylon Retainer
(2) 2" x 9" Hinge Material
(1) 11-3/4" Gray Plastic Outer Tube
(7) 36" Gray Plastic Outer Tube
(17) Clevis Retainer

(6) 6-32 x 1/4" SHCS
(2) 4-40 x 1/4" SHCS
(2) #2 x 3/8" Sheet Metal Screw
(2) #4 x 3/8" Sheet Metal Screw
(4) 8-32 x 1-1/4" SHCS
(4) 8-32 x 1" SHCS
(48) #2 x 1/2" Sheet Metal Screw
(2) 3/16" Wheel Collar
(1) .074 x 12" Wire Threaded One End
(4) .095 x 5-3/4" Wire
(2) .095 x 48" Wire Threaded One End
(16) #2 Flat Washer
(8) #8 Lock Washer
(8) #8 Flat Washer
(8) Nylon Landing Gear Straps

(5) Nylon Anti-Rotation Pins
(4) Pull-Pull Wire (1020mm in length)
(8) 2-56 Threaded Brass Pull-Pull Connector
(8) Wire Crimp Connectors
(2) 3mm Plywood Wheel Pant Mounting Plate
(1) 152mm Velcro

®

(2) 6 x 13 x 36mm Hardwood Blocks
(4) 5mm Wheel Collar
(6) 3 x 5 x 5mm Plywood
(2) 1/4-20 Nylon Bolt (thumb screw type)
(4) Laser-Cut Plywood Parts (for the fiberglass

wire covers)

(2) 3 x 25 x 25mm Plywood Plate

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:

airsupport@g

reatplanes.com

KIT CONTENTS

1

2

4

5

7

6

13

19

12

11

15

16

17

18

15

16

17

18

14

3

8

9

10

❏ 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

Contents”

section on page 6.

❏ 2. Remove the tape and separate the ailerons and flaps

from the wing and the elevators from the stab. Use a
covering iron with a covering sock on high heat to tighten
the covering if necessary. Apply pressure over sheeted
areas to thoroughly bond the covering to the wood.

Do the right wing panel first so your work matches the
photos the first time through

❏ ❏ 1. Drill a 3/32" hole, 1/2" [13mm] deep in the center

of each hinge slot to allow the CA to “wick”in. Follow-up with
a #11 blade to clean out the slots.Hint: If you hav e one, use
a high-speed rotary tool to drill the holes.

❏ ❏ 2. Use a shar p #11 blade to cut a strip of covering

from the hinge slots in the wing and aileron.

❏ ❏ 3. Cut fourteen 1" x 1" [25 x 25mm] hinges from the

CA hinge strip. Snip off the corners so they go in easier.

❏ ❏ 4.T est fit the right aileron to the wing with f our hinges .

If the hinges don’t remain centered, stick a pin through the
middle of the hinge to hold it in position.

❏ ❏ 5. Remove any pins you may have inserted into the

hinges. Adjust the aileron so there is a small gap between the
LE of the aileron and the wing. The gap should be small, just
enough to see light through or to slip a piece of paper through.

❏ ❏ 6. Apply six drops of thin CA to the top and bottom of

each hinge. Do not use CA accelerator. After the CA has
fully hardened, test the hinges by pulling on the aileron.

Install the Ailerons

ASSEMBLE THE WING

PREPARATIONS

7

❏ ❏ 7.Test fit the r ight flap to the wing with three hinges.

Using the same procedure used for the ailerons, join the
flaps to the wing.

8. Repeat steps 1- 7 for the left wing panel.

❏ ❏ 1. Install a 12" [305mm] servo extension onto the

aileron servo lead. Secure the extension to the lead with
tape, a piece of shrink tube or some other method to keep
them from coming unplugged.

❏ ❏ 2. Cut the covering away from the aileron and flap

servo openings in the bottom of the wing.

❏ ❏ 3.Taped inside the aileron ser vo opening is a string.

Taped inside the flap opening is the other end of the string.
Tie the aileron servo extension to the string in the aileron
servo opening.Tie the flap servo lead to the string in the flap
opening. Pull the two ser vo leads through the wing with the
string that is taped to the root rib. Untie the string from the
leads and tape the leads to the wing root to prevent them
from falling back into the wing.

❏ ❏ 4. Install the aileron servo into the aileron servo

opening.Drill through the servo mounting holes with a 1/16"
[1.6mm] drill bit. Remove the servo from the servo opening.
Install and then remove a servo mounting screw into each of
the holes you have drilled. Apply a drop of thin CA into the
holes to harden the threads. Once the glue has hardened
install the servo into the servo opening using the hardware
included with your servo. Center the servo, then install a
servo arm as shown. The arm should be pointing towards
the wing tip.

❏ ❏ 5. Install the flap ser vo into the flap servo opening,

mounting it using the same procedure for the aileron servo.
Install the servo arm onto the flap servo with the arm
pointing towards the root rib. Important! When instructed to
do the left wing, the arm on the flap servo must point
towards the left wing tip, not the root rib as was done on the
right wing panel.

❏ ❏ 6. Place a nylon control horn in line with the last hole

in the servo arm. When positioned properly the control horn
will rest on a hardwood plate in the aileron. Mark the
location of the mounting holes onto the aileron. Drill a 1/16"
[1.6mm] hole on the marks, drilling through the plywood
plate but not through the top of the aileron. Insert and
remove a #2 x3/8" [10mm] screw into each of the holes.
Apply a couple drops of thin CA into the holes to harden the
threads. Once the glue has hardened attach the control
horn to the aileron with two #2 x 3/8" [10mm] screws.

❏ ❏ 7. Screw a 4-40 nut onto a 4-40 x 5-3/4" [146mm]

threaded rod approximately twenty turns. Slide a silicone

Install the Aileron Servos & Pushrods

8

clevis retainer onto a threaded 4-40 metal clevis and then
screw the clevis onto the rod, tightening it against the nut.
Install the clevis onto the nylon control horn. Install an
unthreaded clevis onto the servo arm. Center the aileron.
Then, mark the threaded rod where it should be cut to fit the
clevis. Remove all of the pushrod components from the
servo and control horn. Read the

Expert Tip

that follows.

Then, silver solder the clevis to the pushrod.

❏ ❏ 8. After the rod has cooled, install a clevis retainer

onto the clevis you have just soldered. Then, install the
pushrod onto the aileron and servo.

❏ ❏ 9.Using the same method, install the pushrod linkage

to the flap.

❏ ❏ 10.Using 6-minute epoxy, glue two nylon anti-rotation

pins into the holes in the root of the wing. Each one should
extend from the wing approximately 1/2" [13mm].

❏ 11. Repeat steps 1-9 for the left wing panel.

HOW T O SOLDER

1. Use denatured alcohol or other solvent to thoroughly
clean the pushrod. Use coarse sandpaper to roughen the
end of the pushrod where it is to be soldered.

2. Apply a few drops of soldering flux to the end of the
pushrod, then use a soldering iron or a torch to heat it.Tin
the heated area with silver solder (GPMR8070) by
applying the solder to the end. The heat of the pushrod
should melt the solder-not the flame of the torch or
soldering iron-thus allowing the solder to flow.The end of
the wire should be coated with solder all the way around.

3.Place the clevis on the end of the pushrod.Add another
drop of flux, then simultaneously heat the clevis and
pushrod. Slide the clevis the rest of the way onto the
pushrod as the solder melts.Apply another small amount
of solder while the pushrod and clevis are still hot. The
same as before, the heat of the parts being soldered
should melt the solder, thus allowing it to flow. Allow the
joint to cool naturally without disturbing. Avoid excess
blobs, but make certain the joint is thoroughly soldered.
The solder should be shiny, not rough. If necessary,
reheat the joint and allow to cool.

4. Immediately after the solder has solidified, but while it
is still hot, carefully use a cloth to quickly wipe off the flux
before it hardens. Important: After the joint cools, coat
with oil to prevent rust.Note: Do not use the acid flux that
comes with silver solder for electrical soldering.

9

Did you know…Between 1969 and 1985 Art Scholl
performed in a total of 1,345 airshows in the U.S .A., Canada
and Japan!

❏ 1. Before beginning this step be sure you have plenty of

clamps to assure that the plywood is securely bonded to the
aluminum. Locate the aluminum wing joiner and two 1/8"
[3mm] plywood wing joiners. Using 30-minute epoxy, glue
the plywood to both sides of the aluminum to form the wing
joiner using denatured alcohol and a paper towel, clean any
excess epoxy from the joiner before the glue hardens. After
the glue fully hardens, test fit the joiner into each wing and
the wing center-section. Sand the joiners as needed for a
good fit between the wing halves and the joiner.

❏ 2. Center the joiner in the wing center-section.

❏ 3. Slide both wing halves onto the joiner, pushing the

wings tight against the wing center-section. Locate two
1/4-20 wing bolts with the knurled head and screw them into
the wing and the wing center-section.Do this for both wings.

❏ 4. Once you are satisfied with the fit of the wings to the

wing center-section, glue a 1/4" x 1/2" x 1-1/2" [6 x 13 x 38mm]
hardwood block to the joiner and the wing center-section at
both sides of the center-section.

❏ 5. Using 6-minute epoxy, glue the remaining nylon wing

dowel into the leading edge of the wing center-section.The
dowel should extend approximately 1/2" [13mm] from the
front of the wing center.

The method we have designed for the wing assembly gives
you the flexibility of leaving the wing together as a one piece

Assemble the Wing Center-Section

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