Carl Goldberg GBGA1023 User Manual

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WARNING

A radio-controlled model is not a toy and is not intended for persons under 16 years old. Keep
this kit out of the reach of younger children, as it contains parts that could be dangerous. A radio­controlled model is capable of causing serious bodily injury and property damage. It is the buyer's
responsibility to assemble this aircraft correctly and to properly install the motor, radio, and all other
equipment. Test and fly the finished model only in the presence and with the assistance of another
experienced R/C flyer. The model must always be operated and flown using great care and common
sense, as well as in accordance with the Safety Code of the Academy of Model Aeronautics (5151
Memorial Drive, Muncie, IN 47302, 1-800-435-9262). We suggest you join the AMA and become prop­erly insured prior to flying this model. Also, consult with the AMA or your local hobby dealer to find an
experienced instructor in your area. Per the Federal Communications Commission, you are required
to use only those radio frequencies specified "for Model Aircraft."

LIMITED WARRANTY

Carl Goldberg Products, Ltd. has inspected and certified the components of this aircraft. The company urges the buyer to perform
his own inspection, prior to assembly, and to immediately request a replacement of any parts he believes to be defective for their
intended use. The company warrants replacement of any such components, provided the buyer requests such replacement with­in a period of 10 days from the date of purchase and provided the defective part is returned, if so requested by the company.

No other warranty, expressed or implied, is made by the company with respect to this kit. The buyer acknowledges and under­stands that it is his responsibility to carefully assemble the finished flying model airplane and to fly it safely. The buyer hereby
assumes full responsibility for the risk and all liability for personal or property damage or injury arising out of the buyer's use of the
components of this kit.

CARL GOLDBERG PRODUCTS, LTD.

P.O. Box 818 Oakwood GA 30566 Phone #[phone] Fax # [phone] www.carlgoldbergproducts.com

400

2

USING THIS INSTRUCTION MANUAL

Before you begin assembling your Chipmunk 400 ARF,
take some time to read through this entire instruction book.
It is designed to take you step-by-step through the process
and to give you added information on motor and radio
selection and set-up, balancing your aircraft, and flying
your model. The time you spend will speed the assembly
process and help you avoid problems.

PREPARING FOR ASSEMBLY

You will need a work area of approximately 24 x 48" which has
been covered to protect it from adhesive, as well as cuts and
other damage. Many people cover their work area with a
sheet of dry wall (sheet rock) and/or waxed paper t o pre­vent CAGlue and Epoxy from ruining the work surface.

CONSTRUCTION TIPS

IMPORTANT: ALWAYS READ A FEW STEPS AHEAD.
This will alert you to coming instructions and will help you
plan accordingly.

Using the Parts Identification section, familiarize yourself
with the various items included in your kit box.

Do not hesitate to ask questions. Your local hobby dealer
and area flyers will most likely be happy to help, as they
want you to have a successful flying experience.

ADHESIVES & GLUING TECHNIQUES

CA adhesives are specially formulated to firmly glue the
plywood, hardwood, and balsa used in your model and to
withstand the vibration and stresses of high performance
flight. However, there are times, such as when you are
installing the stabilizer and fin on the fuselage and want
more set-up time for careful alignment and positioning,
then you should use epoxy. Occasionally, you also will
want to use thin CA, which "wicks" into the surrounding
areas. Aliphatic resin glue or similar water-based glues can
also be used, but they will add to the assembly time
because they dry so much more slowly than CA glue.
Remember, when ever using any CA, you must be careful
to read instructions thoroughly, as you will have only sec­onds for positioning of parts. Be sure to trial fit parts
together before gluing. Also, never use watery THIN type
CA glue for gluing plywood and hardwood parts. Thin CA's
do not adequately bond these areas.

CAUTION

Some people may experience an allergic reaction when
exposed to fumes from CA glue or epoxy. As with paints,
thinners, and solvents, it is always important to use glues
only where there is adequate ventilation to carry fumes
away. A fan is recommended. Also, special care must be
taken when using CA, as it will bond skin as well as other
surfaces. Before using any CA, carefully read all label pre­cautions. When using CA, protective eye-wear and care in
keeping the glue away from the face is highly recommend­ed. If CA does happen to get into the eye, hold lid open
and flush with water only. Seek immediate medical atten­tion.

COVERING

The Chipmunk 400 ARF is covered in a polyester film cho­sen for its beauty, toughness, and ease of application and
repair. It is not uncommon for ARF's to develop a few wrin­kles in transit. If this is true of your model, the situation is
easily corrected. Before you begin putting the pieces
together, run around the edge of the seams first then over
the surface of each section with an iron (either specially
designed for airplane use or the more cumbersome house­hold iron). Apply the heat (set at about 350° F), following
along with a soft cloth and pressing down on the covering
as you go around. This will more firmly set the covering
adhesive into the wood and keep your aircraft covering
tight and smooth in the future. Once you have ironed the
seams stay away from them with the heat or the covering
will slide when you try to shrink the middle. If this happens
the wrinkles will not come out of the covering.

One of the great advantages of polyester film is that it can
be applied over itself without causing gas bubbles. This
allows you to repair your aircraft, as well as to customize it
in a number of ways. If, due to a flight mishap, you get a
hole or similar covering damage, simply trim away the
ragged edges and then apply a patch, following the direc­tions that come with your covering , which is available at
your hobby dealer.

The Chipmunk 400 covering can be closely
matched using

Oracover Flame Red

Oracover White

Oracover Midnight Blue

3

ITEMS NEEDED TO COMPLETE THIS AIRCRAFT

 1 4 CHANNEL RADIO WITH 4 MICRO SER-

VOS. (WE USED 4 CHANNEL FUTABA
RADIO WITH S3108 SERVOS AND GREAT
PLANES ELECTRIFLY RECEIVER W/O

SPEED CONTROL)

 1 6” SERVO “Y” HARNESS

 2 6” SERVO EXTENSIONS

 1 ELECTRONIC SPEED CONTROL (WE

USED A CASTLE CREATIONS PHOENIX
25 BRUSHLESS SPEED CONTROL)

 1 3 CELL LI-PO BATTERY (GREAT PLANES

ELECTRIFLY 1500)

 1 ULTRAFLY BRUSHLESS MOTOR A/30/29

WITH 3.89 GEAR RATIO

 1 GREAT PLANES ELECTRIFLY PROP

ADAPTER 3MM APC LONG

 1 APC PROPELLER 9 X4.7 SLO FLYER

 1 CA ACCELERATOR
 1 1 OZ. BOTTLE CA MEDIUM GLUE
 1 1/2 OZ. BOTTLE CA THIN GLUE
 1 5 MINUET EPOXY
 1 1/4” FOAM RUBBER
 1 #2 X 1/4” SHEET METAL SCREW FOR

MOTOR(MIGHT BE REQUIRED FOR SOME
MOTOR INSTALLATIONS)

TOOLS AND SUPPLIES FOR ASSEMBLY.

 MODELING OR UTILITY KNIFE
 WORK SURFACE (24" X48")
 SMALL STANDARD & PHILLIPS SCREW-

DRIVERS

 MASKING TAPE
 NEEDLE NOSE PLIERS
 24” RULER
 FLEXIBLE STRAIGHT-EDGE
 30-60-90° x 6" TRIANGLE
 SOFT PENCIL
 A FEW STRAIGHT OR "T" PINS
 WIRE CUTTER (DYKES)
 OPTIONAL HEAT GUN/COVERING IRON
 ACID BRUSH
 5 FT. LENGTH OF STRING

Caution:

Before starting, care-

fully go over all high

stress areas (Wing

bolt mounting blocks,

Firewall,etc.) with an

epoxy or wood glue to

confirm all areas are

well glued.

4

Wing

JOINING THE WING

1.  Collect the following items:

(1) Right wing
(1) Left wing
(1) Wing joiners
(2) 5mm x 17 dowel
A book or block of wood

NOTE: If the covering on your wing has loosened in

transit, refer to the covering section of the
INTRODUCTION before continuing.

2.  Insert the wing joiner with the angle cut facing

up, into the joiner pockets in both wing halves.
The joiners should fit easily in the pockets and
the wing halves should meet in the middle,
with the wing dihedral forming a broad "V".

 Trial fit the wing dowel in the hole, as shown

above. When satisfied with the fit of the dowel
and the joiners, remove them from the wing
pockets.

3.

 Working on a protected surface, and with a

paper towel handy for cleaning fingers,
THOROUGHLY mix 1-2 large (soup) spoons
each from bottle A and bottle B of Epoxy. (Use
equal amount of each part and mix with a stick
in a plastic or paper cup, or on a sheet of
waxed paper.)

 Spread epoxy on the joiner
 Put additional epoxy in the joiner pockets and

in the dowel hole and spread a thin layer of
epoxy along one side of the entire center joint
area. Immediately proceed to the next step.

4.

 Working rapidly, so that the epoxy does not set

before you are finished, slide the wing joiner
into one wing pocket.

 Slide the dowels into the dowel holes. Then

slide the wing halves together until they are
touching.

5.  With masking tape, tape the wing halves

together at the trailing edge and close to the
leading edge, as shown. This will help keep
the wing from twisting.

 Place additional tape at several locations

across the center seam of the wing, so that the
halves stay firmly together while the epoxy
sets.

NOTE: When one wing half is flat on the table, the
wing dihedral will force the other side of the wing up
about 2-1/2" off the table. Place a book or a block of
wood under the high side to support the wing and keep
the halves in proper position. Caution: Do not distort

the wing by blocking it too high or too low, and do
not touch the assembly until the epoxy dries.