Great Planes GPMA0491 User Manual

WARRANTY

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

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

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

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

SP15P02 V1.0 Entire Contents © Copyright 1999

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

[e-mail]

INSTRUCTION MANUAL

TM

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

INTRODUCTION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

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

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

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

Required accessories . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Building supplies and tools . . . . . . . . . . . . . . . . . . . . . . 3

Optional supplies and tools . . . . . . . . . . . . . . . . . . . . . . 4

Building notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Common abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . 5

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

Get ready to build . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Metric conversion chart . . . . . . . . . . . . . . . . . . . . . . . . . 5

DIE-CUT PATTERNS. . . . . . . . . . . . . . . . . . . . . . . . . . . 6

BUILD THE TAIL SURFACES . . . . . . . . . . . . . . . . . . . . 7

Build the stab . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Build the elevators. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7

Build the fin. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Build the rudder. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8

Hinge the tail surfaces . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Finish the tail surfaces. . . . . . . . . . . . . . . . . . . . . . . . . . 9

BUILD THE WING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9

Build the wing center section. . . . . . . . . . . . . . . . . . . . . 9

Build the outer wing panels . . . . . . . . . . . . . . . . . . . . . 13

Finish the wing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16

BUILD THE FUSELAGE . . . . . . . . . . . . . . . . . . . . . . . 17

Assemble the fuselage formers and sides . . . . . . . . . . 17

Mount the wing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Mount the engine . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20

Mount the tail . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21

Build the front deck and turtle deck . . . . . . . . . . . . . . . 23

Install the servos and make the pushrods . . . . . . . . . . 25

PREPARE FOR COVERING . . . . . . . . . . . . . . . . . . . . 26

COVER THE MODEL WITH MONOKOTE FILM. . . . . . 26

FUELPROOF THE MODEL . . . . . . . . . . . . . . . . . . . . . 26

INSTALL THE WINDSHIELD . . . . . . . . . . . . . . . . . . . . 26

INSTALL THE TANK . . . . . . . . . . . . . . . . . . . . . . . . . . 27

INSTALL THE LANDING GEAR . . . . . . . . . . . . . . . . . 27

FINAL HOOKUPS AND CHECKS . . . . . . . . . . . . . . . . 27

Attach the control surfaces . . . . . . . . . . . . . . . . . . . . . 27

Install the hardware. . . . . . . . . . . . . . . . . . . . . . . . . . . 28

Final servo and receiver installation. . . . . . . . . . . . . . . 28

Set the control throws . . . . . . . . . . . . . . . . . . . . . . . . . 28

BALANCE YOUR MODEL. . . . . . . . . . . . . . . . . . . . . . 28

Balance the model laterally . . . . . . . . . . . . . . . . . . . . . 28

Balance the model fore & aft (CG). . . . . . . . . . . . . . . . 29

PREFLIGHT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Charge the batteries . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Balance the propeller. . . . . . . . . . . . . . . . . . . . . . . . . . 29

Find a safe place to fly . . . . . . . . . . . . . . . . . . . . . . . . 29

Ground check the model . . . . . . . . . . . . . . . . . . . . . . . 30

Range check your radio. . . . . . . . . . . . . . . . . . . . . . . . 30

Engine safety precautions . . . . . . . . . . . . . . . . . . . . . . 30

AMA safety code. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30

FLYING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Takeoff . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Flight. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

Landing. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31

TWO VIEW DRAWING. . . . . . . . . . . . . . . . . . back cover

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

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

avoid risking your model before you’re truly ready to fly it
solo. Your local hobby shop has information about flying
clubs in your area whose membership includes qualified
instructors. You may also contact the national Academy of
Model Aeronautics (AMA), which has more than 2,500
chartered clubs across the country. Contact the AMA at the
address or toll-free phone number below.

Academy of Model Aeronautics

5151 East Memorial Drive

Muncie, IN 47302-9252

Tele. [phone]

Fax [phone]

or via the Internet at http://www.modelaircraft.org

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

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

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

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

PRECAUTIONS

PROTECT YOUR MODEL,YOURSELF

& OTHERS...FOLLOW THIS

IMPORTANT SAFETY PRECAUTION

TABLE OF CONTENTS

2

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

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

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

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

Congratulations and thank you for purchasing the Great
Planes SlowPoke. The SlowPoke is perfectly suited for
small field flying and because of its size is easy to transport.
Great Planes has taken a simplified approach to the
SlowPoke's design by incorporating a CAD designed
airframe with the "stick style" construction of yesteryear.

The SlowPoke was intentionally designed for easy 3-channel
flying, a small displacement engine and a light wing loading.
When finished, the SlowPoke is quite capable of slow,
leisurely flight without the worry. Its styling is reminiscent of
the Golden Age of aviation and very pleasing.

Items in parentheses (OSMG2691) are suggested part
numbers recognized by distributors and hobby shops and
are listed for your ordering convenience. GPM is the Great
Planes

®

brand, TOP is the Top Flite®brand, and HCA is the

Hobbico

®

brand.

❏ 4 Channel Radio with 3 Servos
❏ Engine; See Engine Selection
❏ Spare Glow Plugs

(O.S.

®

#8 for most 2-stroke engines, OSMG2691)

(O.S.®Type-F for most 4-stroke engines, OSMG2629)

❏ Propeller (Top Flite Power Point

®

) Refer to your

engine’s instructions for proper size

❏ Top Flite Super MonoKote

®

covering (Approximately 2

rolls); See Covering (page 26)

❏ Fuel-Proof paint; See Fuelproofing (page 26)
❏ 12" Medium Fuel Tubing (GPMQ4131, 3’)
❏ 1/4" Latex Foam Rubber Padding (HCAQ1000)
❏ 4 oz. Fuel Tank (GPMQ4101)
❏ (2) 3" Lightweight Wheels (DAVQ5030)
❏ (4) 5/32" Wheel Collars (GPMQ4306)
❏ (1) 3/32" Wheel Collar (GPMQ4303)
❏ 1-1/2" Spinner (GPMQ4500 – white)
❏Pilot (WBRQ2475) Scale Sportsman Pilot used in prototype.
❏ (1) 1-1/4" Tail Wheel (GPMQ4242)

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

❏ 1 oz. Thin Pro

™

CA (GPMR6002)

❏ 1 oz. Medium Pro

™

CA+ (GPMR6008)

❏ 1 oz. Thick Pro

™

CA– (GPMR6014)

❏ Pro CA Accelerator (GPMR6035)
❏ 6-Minute Pro

™

Epoxy (GPMR6045)

❏ 30-Minute Pro

™

Epoxy (GPMR6047)

❏ Pacer Formula 560 Canopy Glue (PAAR3300)
❏ #1 Hobby Knife Handle (HCAR0105)
❏ #11 Blades (HCAR0311, 100 Qty.)
❏ X-Acto

®

Razor Saw (XACR2531)

❏ Hobbico Builder’s Triangle Set (HCAR0480)
❏ Small T-pins (HCAR5100)
❏ Medium T-pins (HCAR5150)
❏ Great Planes Plan Protector

™

(GPMR6167)

❏ Chalk
❏ Masking Tape
❏ 10-32 Tap and Drill set (GPMR8104, drill bit included)

Building Supplies and Tools

Required Accessories

PREPARATIONS

Engine Selection

There are several engines that will work well in the
SlowPoke, but for maximum performance we recommend
an O.S.®.15 LA or .20 FP™or if you prefer a 4-stroke, an
O.S. .26 Surpass works well.

DECISIONS YOU MUST MAKE

INTRODUCTION

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

3

4

❏ Electric Power Drill
❏ Drill Bits: 1/16", 1/8", 3/16", 5/32", 13/64", 9/64", 1/4"
❏ Monofilament line for aligning wing and stabilizer
❏ Screwdrivers (Phillips and Flat Blade)
❏ HobbyLite™Balsa Filler (HCAR3401)
❏ Sealing Iron (TOPR2100)
❏ Bar Sander or Sanding Block and Sandpaper (coarse,

medium, fine grit)

❏ CG Machine™(GPMR2400)
❏ AccuThrow®Deflection Meter (GPMR2405)
❏ Great Planes Dead Center™Engine Mount Hole

Locator (GPMP8130)

❏ CA Applicator Tips (HCAR3780)
❏ Epoxy Brushes (GPMR8060)
❏ Epoxy Mixing Sticks (GPMR8055, Qty. 50)
❏ CA Debonder (GPMR6039)
❏ Clevis Installation Tool (GPMR8030)
❏ Hot Sock™(TOPR2175)
❏ Trim Seal Tool (TOPR2200)
❏ Heat Gun (TOPR2000)
❏ Single Edge Razor Blades (HCAR0312, 100 Qty.)

❏ Razor Plane (MASR1510)
❏ 36" Non-Slip Straightedge (HCAR0475)
❏ Denatured or Isopropyl Alcohol (for epoxy clean-up)
❏ Dremel®Moto-Tool™or similar w/Sanding Drum, Cutting

Burr, Cut-off Wheel

❏ Curved-Tip Canopy Scissors (HCAR0667)
❏ Servo Horn Drill (HCAR0698)
❏ Top Flite Precision Magnetic Prop Balancer™(TOPQ5700)
❏ Great Planes Fingertip Balancer (GPMQ5000)

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"

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

For example 4-40 x 3/4"

When you see the term “test fit” in the instructions, it
means you should first position the part on the assembly
without using any glue, then slightly modify or “custom fit”
the part as necessary for the best fit. Do not glue until told
to do so.

When you see the term “fit and glue” in the instructions, it
means you should first position the part on the assembly
without using any glue, then modify or “custom fit” the
part as necessary for the best fit. Glue when you are
satisfied with the fit.

Whenever just “epoxy” is specified you may use either
30-minute epoxy or 6-minute epoxy. When 30-minute
epoxy is specified it is highly recommended that you use
only 30-minute epoxy because you will need the working
time and/or the additional strength.

Where you see the term “glue”, it is at your option to select
the thickness of CA with which you are most comfortable. If
the step indicates a particular thickness of glue, be sure to
use the thickness recommended for strength, penetration
and/or working time.

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

Building Notes

Optional Supplies and Tools

GPMR6169 Hand Sander-5.5" GPMR6170 Bar Sander-11"
GPMR6172 Bar Sander-22" GPMR6174 Bar Sander-33"

GPMR6176 Bar Sander-44"

GPMR6190 Multi-Sander-11" GPMR6191 Multi-Sander-22"

GPMR6180 80-Grit Sandpaper-12' roll
GPMR6183 150-Grit Sandpaper-12' roll
GPMR6184 180-Grit Sandpaper-12' roll
GPMR6185 220-Grit Sandpaper-12' roll

Made of durable, lightweight aluminum, Easy-Touch

™

Sanders have a uniquely contoured handle that lets you
work longer with less fatigue! The incredibly flat sanding
surface removes high spots with ease. The 5.5" Hand
Sander is ideal for small parts and tight spaces. Use the
11" - 44" Bar Sanders for larger areas. Take the
guesswork out of sanding curved or angled shapes with
the Easy-Touch Multi-Sander. Available in 11" and 22"
lengths. Easy-Touch adhesive-backed sandpaper is
already trimmed to these tools’ width...just cut it to length
and press in place. Available in 4 different grits.

Elev = Elevator Fuse = Fuselage

LE = Leading Edge (front) LG = Landing Gear

Lt = Left Ply = Plywood

Rt = Right Stab = Stabilizer

TE = Trailing Edge (rear) " = Inches

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

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

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

Zipper-top food storage bags are handy to store the small
parts as you sort, identify and separate them into
sub-assemblies.

Metric Conversion Chart

1” = 25.4mm (conversion factor)

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

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

1/4" = 6.4mm

3/8" = 9.5mm

1/2" = 12.7mm

5/8" = 15.9mm

3/4" = 19mm

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

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

Get Ready to Build

Balsa Basswood Plywood

Types of Wood

Common Abbreviations

5

Inch Scale

0" 1" 2" 3" 4" 5" 6" 7"

Metric Scale

0 10 20 30 40 50 60 70 80 90 100 110 120 130 140 150 160 170 180

6

DIE-CUT PATTERNS

You may remove the stabilizer and elevator drawing from
the plan by cutting along the dashed line. Don’t forget to
cover the plan with Great Planes Plan Protector™so the
glue won’t stick to the plan.

❏ 1. Pin the die-cut 3/16" balsa stab LE brace in position
over the plan. Glue the die-cut 3/16" balsa stab center to
the stab LE brace.

❏ 2. From a 3/16" x 1/2" x 24" balsa stick, fit and glue the
rear brace in place. Note: Save all the remaining pieces of
the sticks that you cut.

❏ 3. From a 3/16" x 1/2" x 24" balsa stick, fit and glue the
trailing edge to the rear brace.

❏4. Glue the die-cut 3/16" balsa stab tipsto the traili ng edge.

❏ 5. From a 3/16" x 1/2" x 24" balsa stick, fit and glue the

two leading edges in place.
❏ 6. From two 3/16" x 3/16" x 24" balsa sticks, fit and glue

the stab bracing in place.
❏ 7. Remove the pins and sand the top and bottom of the

stab smooth. Note: Be careful not to sand any dips in the
stab bracing.

❏ 8. Sand the leading edge and the tips to a rounded shape
as shown on the plan.

❏❏1. Pin the two die-cut 3/16" balsa elevator tips to the
plan. Note: There is a difference in the shape of the inboard
and outboard tips.

❏❏2. Using a 3/16" x 1/2" x 24" balsa stick, fit and glue the
leading and trailing edge in place.

❏❏3. Using a 3/16" x 3/16" x 24" balsa stick, fit and glue
the five elevator ribs in position.

❏❏4. Unpin the elevator half and set aside.

Build the Elevator

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

Build the Stab

BUILD THE TAIL SURFACES

7

❏ 5. Repeat steps 1 through 4 to build the second
elevator half.

❏ 6. Pin one elevator half in place on the plan, making sure
the elevator is right side up. Position the second elevator
half over the plan, making sure it is a mirror image of the
pinned half. Use a straight edge, held against the LE of the
pinned down half, to ensure the elevator halves are aligned.
Pin the second half in place.

❏ 7. Trim the leading edges to accept the 3/16" x 3-1/2"
dowel. Glue the dowel to both halves with medium CA.
Remove the elevator from the building board.

❏ 8. Fill the area around the dowel with Hobbico HobbyLite
balsa-colored filler. Set the elevator assembly aside and let
the filler dry.

❏ 1. Cover the fin and rudder section of the plan with Great
Planes Plan Protector.

❏ 2. From a 3/16" x 1/2" x 24" balsa stick, fit and glue the
fin trailing edge, fin base and the fin leading edge. Note:
The fin trailing edge stops at the top of the stab. It does not
go to the bottom of the fuse.

❏ 3. From a 3/16" x 3/16" x 24" balsa stick, fit and glue the
center fin brace in postion.

❏ 4. From a 1/8" x 3/16" x 24" balsa stick, fit and glue the
two diagonal fin braces in place.

❏ 5. Remove the fin from the work surface and sand both
sides smooth.

Refer to this photo for the following 6 steps.

❏ 1. From a 3/16" x 1/2" x 24" balsa stick, cut and pin the

rudder leading edge in place on the plan.
❏ 2. Glue the die-cut 3/16" balsa rudder bottom and

rudder top to the rudder leading edge.

❏ 3. Glue the die-cut 3/16" balsa rudder trailing edge to
the rudder top and bottom.

❏ 4. From a 3/16" x 3/16" x 12" balsa stick, fit and glue the
two horizontal rudder braces in place.

❏ 5. From a 1/8" x 3/16" x 24" balsa stick, fit and glue the
three diagonal rudder braces in place.

❏ 6. Remove the rudder from the work surface and sand
both sides smooth.

Build the Rudder

Build the Fin

8

❏❏1. Place the stab over its location on the plan. Lightly
mark the hinge locations on the trailing edge with a ball
point pen. Mark the hinge locations on the elevator in the
same manner.

If you choose not to purchase a Slot Machine™you can
make the slots by following these instructions.

❏❏2. Cut the hinge slots in the elevator and stabilizer using
a #11 blade. Begin by carefully cutting a very shallow slit at

the hinge location to accurately establish the hinge slot.
Make three or four more cuts, going a little deeper each
time. As you cut, slide the knife from side to side until the slot
has reached the proper depth and width for the hinge.

❏❏3. Cut 3/4" x 1" hinges for the elevator from the
supplied 2" x 9" hinge material, then snip off the corners.
Temporarily join the elevator to the stab with the hinges,
adjusting any hinge slots if necessary so they all align. Do

not glue in the hinges until you are instructed to do so.

❏ 4. Repeat steps 1 through 3 to hinge the rudder and fin.

❏ 1. Shape the leading edge of the elevator and rudder to

a “V” as shown on the plan.

❏ 2. Sand both sides of the elevator assembly smooth.
❏ 3. Use a bar sander and 150-grit sandpaper to round the

tail surfaces, as shown on the plan.

Note: All of the wing ribs have been partially die-cut at the bottom
of the trailing edge. Use a hobby knife to complete the die-cut.

❏ 1. Glue four die-cut 1/32" ply W2B’s to the four die-cut
1/16" balsa W2 ribs. Glue four more W2Bs to the other side
of the four W2 ribs. Note: Each of these rib assemblies is
now referred to as W2.

❏ 2. Drill two 1/8" holes at the punch marks in each of the
four W2 ribs. Drill two 1/8" holes at the punch marks in each
of the two die-cut 1/8" balsa W3 ribs.

Build the Wing Center Section

BUILD THE WING

Finish the Tail Surfaces

To cut the hinge slot, place the blades onto the wood
where you want the slot. Lightly press the teeth into the
wood. When you are satisfied with the location, press the
button on the handle and the blades will cut easily into the
balsa wood.

We have simplified the task of cutting hinge slots with the
introduction of the Great Planes Slot Machine™. This
simple electric tool cuts a perfect width slot for use with
CA hinges.

Hinge the Tail Surfaces

9

1"
1"

3/4"

❏ 3. Glue a die-cut 1/8" ply W1A to the die-cut 1/8" balsa
W1 rib. Glue the die-cut 1/16" balsa Sheeting Brace SB to

W1A. Glue the second W1A and the second sheeting
support to the other side of the W1 rib. Note: This rib
assembly is now referred to as W1.

❏ 4. Lay the wing plan on the building board. Hint: Y ou may
cut the wing plan section from the plan. Don’t forget to cover
it with Great Planes Plan Protector.

❏ 5. Cut the two 1/4" x 3/8" x 24" balsa sticks to 21-3/16"
long, making two main spars. Pin the bottom main spar in
place over the plan. Note: The T-pins need to go into the
spar at an angle from the front so that they will not interfere
with the top spar or the shear webs.

❏ 6. Cut six 1/8" x 3/16" x 24" balsa sticks to 21-3/16" long,
making the auxiliary spars.

❏ 7. Postion three auxiliary spars over the plan. Note: Do
not pin them in place.

❏ 8. Making sure to keep the W3 ribs perpendicular to the
building board, position the ribs and glue them to the main
spar and the auxiliary spars.

❏9. Position and glue the W1 rib and the four W2 ribs in place.

❏ 10. Position and glue the 1/4" x 3/8" x 21-3/16" balsa top

main spar in the ribs.

❏ 1 1. Position and glue the 1/8" x 3/16" x 21-3/16" balsa top
auxiliary spars to the ribs.

❏ 12. From a 1/16" x 5/8" x 24" balsa sheet, cut two 10­7/16" long pieces, making two sub leading edges.

❏ 13. Position and glue both 10-7/16" sub leading edges to
the front edge of the ribs.

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