Great Planes GPMQ1882 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 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.

GPMZ0281 for GPMQ1882 V1.1Entire Contents © Copyright 2004

Champaign, IL 61822

[phone], Ext. 5

[e-mail]

INSTRUCTION MANUAL

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

PRECAUTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

POINTS TO CONSIDER . . . . . . . . . . . . . . . . . . . . . . . . 3

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

Adhesives and Building Supplies . . . . . . . . . . . . . . . . 3

Optional Supplies and Tools . . . . . . . . . . . . . . . . . . . . 3

Hardware and Accessories. . . . . . . . . . . . . . . . . . . . . 3

Parts Identification . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

Important Building Notes . . . . . . . . . . . . . . . . . . . . . . 4

ASSEMBLY. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Install the Steering Servo . . . . . . . . . . . . . . . . . . . . . . 5

Assemble the Water Rudder. . . . . . . . . . . . . . . . . . . . 6

Install the Water Rudder. . . . . . . . . . . . . . . . . . . . . . . 7

POSITIONING OF FLOATS. . . . . . . . . . . . . . . . . . . . . . 9

PREP ARE THE MODEL . . . . . . . . . . . . . . . . . . . . . . . 10

INST ALL THE FLOA TS . . . . . . . . . . . . . . . . . . . . . . . . 11

Install the Float Gear Wires. . . . . . . . . . . . . . . . . . . . 11

Install the Floats on the Model . . . . . . . . . . . . . . . . . 12

Connect the Float Servo. . . . . . . . . . . . . . . . . . . . . . 12

Install the Air Rudder Pushrod . . . . . . . . . . . . . . . . . 13

Set the Water Rudder Throw . . . . . . . . . . . . . . . . . . . 14

Install the Ventral Fin . . . . . . . . . . . . . . . . . . . . . . . . 14

Balance the Model . . . . . . . . . . . . . . . . . . . . . . . . . . 15

FLYING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15

Thank you for purchasing the Great Planes ARF Sport
Floats. During our flight testing with these floats, we were
amazed by the superb handling characteristics on the water
and the ultra-smooth, realistic takeoffs and landings.

While the Great Planes ARF Sport Floats were designed for the
.40 size Great Planes Piper J-3 Cub ARF, they will work well
with other models, too.Although the Great Planes Cub ARF is
used as an example, the same procedures and guidelines apply
if you are installing your floats on a different model.

You will discover that the Great Planes ARF Sport Floats are
easily installed, often in just one hour. All of the parts you
need are included in this kit.

1. Your Great Planes ARF Sport Floats and model 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 ARF Sport
Floats and model, if not assembled and operated correctly,
could possibly cause injury to yourself or spectators and
damage to property.

2. You must assemble the Sport Floats according to the
instructions. Do not alter or modify the floats, 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 use an R/C radio system that is in first-class
condition, and a correctly sized engine and components
(fuel tank, etc.) throughout the building process.

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

5.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.

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

7.You should have a boat available to retrieve your model.
Do not attempt to swim after your model.

PRO TECT YOUR MODEL,YOURSELF

& OTHERS...FOLLOW THESE

IMPORTANT SAFETY PRECAUTIONS

INTRODUCTION

TABLE OF CONTENTS

2

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

If you 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.

You’ll learn faster and avoid risking your model before you
are truly ready to fly it. Your local hobby shop has
information about clubs in your area whose membership
includes experienced pilots.

In addition to joining an R/C club, we strongly recommend you
join the AMA (Academy of Model Aeronautics). AMA
membership is required to fly at AMA sanctioned clubs. There
are over 2,500 AMA chartered clubs across the country .Among
other benefits, the AMA provides insurance to its members who
fly at sanctioned sites and events. Additionally, training
programs and instructors are availab le at AMA club sites to help
you get started the right way .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

For steering your model on the water, a water rudder will be
installed on the right float.The water rudder can be connected
to the aircraft rudder by a pushrod, or a servo can be installed
inside the float. All parts required for either type installation are
included with this kit (servo not included).

We highly recommend that you install a servo inside the
float. It is easy to do and it makes installation/removal of the
floats on the aircraft easier.

Floats increase the weight of the model they are installed
on. In addition, water drag and surface tension increase the
amount of power required for takeoff. In-flight drag is also
greatly increased.

If your model had “adequate” power before floats are installed,
it will likely be very marginally powered with the floats. It is
recommended that you use an engine in the upper end of the
recommended power range with these floats.

For the .40 size Great Planes Piper J-3 Cub ARF, we recommend
an O.S.®.46 FX 2-stroke or an O.S.FS 70 4-stroke engine.

❏ 1/2 oz. [15g] Thin Pro™CA (GPMR6001)
❏ 1/2 oz. [15g] Medium Pro CA+ (GPMR6007)
❏ Pro 6-minute epoxy (GPMR6045)
❏ 2-56 Tap and Drill (GPMR8100)
❏ Stick-on segmented lead weight (GPMQ4485)
❏ #1 Hobby knife (HCAR0105)
❏ #11 blades (5-pack, HCAR0211)
❏ Clear water proof tape
❏ Dr ill bits: 1/16” [1.6mm], 5/64" [2mm], 1/8" [3.2mm].

(25/64" or 3/8" [9.9 or 9.5mm] for optional
servo installation.)

❏ Razor saw

❏ 2 oz. [57g] spray CA activator (GPMR6035)
❏ CA applicator tips (HCAR3780)
❏ CA debonder (GPMR6039)
❏ Mixing sticks (50, GPMR8055)
❏ Mixing cups (GPMR8056)
❏ Pliers with wire cutter (HCAR0630)
❏ Denatured alcohol (for epoxy clean up)
❏ Z-bend pliers (HCAR2000)
❏ Rotar y tool such as Dremel

®

❏ Rotar y tool reinforced cut-off wheel
❏ Ser vo horn dr ill (HCAR0698)
❏ CG Machine™(GPMR2400)

For internal servo:

❏ (1) standard ser vo
❏ (1) 12" [300mm] ser vo extension
❏ (1) Y -harness

Hardware & Accessories

Optional Supplies & Tools

Adhesives & Building Supplies

PREPARATIONS

POINTS TO CONSIDER

3

Before starting to build, use the Parts Identification list to
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 on this page.

Great Planes Product Support:

Telephone: [phone]

Fax: [phone]

E-mail: [e-mail]

If you are not going to install a servo inside the float, skip the
following section and go to “Assemb le the Water Rudder”on
page 6.

Before starting assembly, assemble the model and mark
the balance point of the model.You will need to know this
later when the model is balanced with the floats installed.

Important Building NotesParts Identification

4

Hardware bag contents:
(3) SMALL NYLON TIE STRAP
(3) FLAT LANDING GEAR STRAPS, TREE OF 4
(34) #4 X 1/2" PHILLIPS HEAD SHEET METAL SCREW
(4) WHEEL COLLAR SET SCREW
(4) 5 mm WHEEL COLLAR
(35) #4 FLAT WASHER
(1) 2-56 HEX NUT
(1) 4-40 LOCK NUT
(4) #62 RUBBER BAND
(1) 2-56 X 3/8" PHILLIPS HEAD SHEET METAL SCREW
(1) 4-40 X 1/4" SOCKET HEAD CAP SCREW

(3) 2-56 X 1/2" PHILLIPS HEAD MACHINE SCREW
(1) BRASS BODY FOR SCREW-LOCK CONNECTOR
(1) NYLON RETAINER
(1) FASLINK
(1) RUBBER BOOT
(1) 4-40 x 1/8" SOCKET HEAD CAP SCREW
(1) LARGE NYLON CONTROL HORN
(1) 5/32" GEAR HUMP STRAP, TREE OF 4
(2) NYLON CLEVIS
(2) SILICONE CLEVIS RETAINER
(1) 2-56 X 1" ROD THREADED FULL LENGTH
(1) 2-56 x 6" THREADED ONE END WIRE

❏ 1. Use the servo tray to mark the outline of the tray on

one of the floats with a fine-tipped marking pen as shown in
the photo above.The tray should be located 1/2" [13mm] aft
of the rear groove in the float.This float is now the right float.

❏ 2. Very carefully cut the marked area from the float with

a razor saw. The piece you cut out will be used as the tray
cover, so use care not to damage it. Mark the end of the
cover that was facing forward.

❏ 3. Glue the servo tray to the inside of the cover with

epoxy. Use some medium grit sandpaper to rough up the
inside of the cover first. Mark the tray indicating which end
of the cover faces forward.

Note: The tray may not have the cutout shown in the
above photo.

❏ 4. Clean any resin residue from the tray opening in the

float.Trim any resin from the hardwood mounting rail inside
the float. Put one of the 1/4" x 3/8" x 3-1/2" [6.4 x 9.5 x
89mm] basswood servo tray rails in the float, butting one
end against the mounting rail. Mark the rear of the opening
on the rail.Transfer the mark to the other rail as well.

❏ 5. Glue a 1/8" x 3/8" x 1/2" [3.2 x 9.5 x 12.7mm] ply rail

spacer to each of the servo tray r ails as shown in the photo.

In the photo, the mark is to the left of the spacers.

❏ 6. Using medium CA, tack glue the servo tray rails into

the float opening with the spacers toward the rear of the
float. Scuff the area with some medium grit sandpaper to
improve the adhesion.

❏ 7. Trial fit the servo tray to the top of the rails. If the tray

sticks up above the top of the float, remove the servo tray

Install the Steering Servo

ASSEMBLY

5