Balance your model, Route the receiver antenna – Great Planes Cessna 182 Skylane 40 ARF - GPMA1228 User Manual

Page 22

One leading cause of crashes is flying an airplane with its
control throws set differently from those recommended in
the instructions. The Great Planes AccuThrow

™

lets you

quickly and easily measure actual throws first, so you can
make necessary corrections before you fly. Large, no-slip
rubber feet provide a firm grip on covered surfaces without
denting or marring the finish. Spring tension holds
AccuThrow’s plastic ruler steady by each control surface.
Curved to match control motions, the ruler provides exact
readings in both standard or metric measurements.
GPMR2405.

Route the antenna to the tail of the model. You may use your
preferred method or the method we use in the Great Planes

model shop. Drill a 1/4" [6mm] hole through the fuse side in
the proximity of the receiver. Cut a 1/2" [13mm] long piece
of fuel tubing and install it in the hole. Install a strain relief
(as shown in the sketch), then route the antenna through the
fuel tubing to the bottom of the fuse at the tail. Use a rubber
band to attach the antenna to a T-pin at the aft end of the
fuselage. Do not cut or shorten the antenna wire. Leave any
excess to hang free.

Special Note: Do not confuse this procedure with “checking
the C.G.” or “check the fore-aft balance.”

Now that you have the basic airframe completed, this is a
good time to balance the airplane laterally (side-to-side).
Here is how to do it:

❏

1. Attach the wing to the fuselage.

❏

2. With the wing level, lift the model by the engine

propeller shaft and the fin post (this may require two
people). Do this several times.

If one wing always drops when you lift the model, it means
that side is heavy. Balance the airplane by gluing weight to
the other wing tip. Note: An airplane that has been laterally
balanced will track better in loops and other maneuvers.

Note: This section is VERY important and must NOT be
omitted! A model that is not properly balanced will be
unstable and possibly unflyable.

The balance point (C.G.) is located 3" [76mm] back from the
leading edge of the wing against the fuselage. Balance your
Cessna using a Great Planes C.G. Machine

™

Airplane

Balancer (GPMR2400) for the most accurate results. This is
the balance point at which your model should balance for
your first flights. After initial trim flights and when you
become more acquainted with your Cessna, you may wish
to experiment by shifting the balance up to 1/4" [6mm]

Check the Fore–Aft Balance

Check the Lateral Balance

BALANCE YOUR MODEL

Route the Receiver Antenna

results in more throw.

Moving the clevis inward on the control horn

throw

movement

results in more pushrod movement.

Moving the clevis outward on the servo arm

Less

movement