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If any of the servo movements are opposite, reverse the
servo direction with the servo reversing switches on the
transmitter.
❏
2. Check the movement of the control surfaces. Use
a ruler to match our measurements listed below. If your
radio features dual rates, set up both the high and low
rates following the radio system’s instructions. If your
radio does not have dual rates, set up the throws at the
low rate first, and gradually increase the throws as you
get familiar with your new aircraft.
Low Rate
High Rate
Aileron
1/4" up
3/8" up
1/4" down
3/8" down
Elevator
1/4" up
3/8" up
1/4" down
3/8" down
Rudder
1" right
same as low rate
1" left
same as low rate
These are the suggested control throws from neutral.
If you need more movement, you should move the clevis
to a hole closer to the surface or you can move the
linkage further away from the center on the servo arm.
If you have too much movement, do the opposite at
either the control horn or servo arm. See the sketch
below to further illustrate increasing and decreasing
control throws mechanically:
Note: This section is VERY important and must NOT
be omitted! A model that is not properly balanced will
be unstable and possibly unflyable.
❏
1. Accurately mark the balance point on the top of the
wing on both sides of the fuselage. The balance point is
located 3-1/4" (82.5mm) back from the leading edge.
This is the balance point at which your model should
balance for your first flights. Later, you may wish to
experiment by shifting the balance up to 3/16" (5mm)
forward or back to change the flying characteristics.
Moving the balance forward may improve the
smoothness and arrow-like tracking, but it may then
require more speed for takeoff and make it more difficult
to slow down for landing. Moving the balance aft makes
the model more agile with a lighter and snappier “feel”.
In any case, please start at the location we recommend
and do not at any time balance your model outside the
recommended range.
❏
2. With the wing attached to the fuselage, all parts of
the model installed (ready to fly), and empty fuel tanks,
hold the model at the marked balance point with the
stabilizer level.
❏
3. Lift the model. If the tail drops when you lift, the
model is “tail heavy” and you must add weight* to the
nose. If the nose drops, it is “nose heavy” and you must
add weight* to the tail to balance. Note: Nose weight
may be easily installed by using Great Planes
(GPMQ4485) “stick-on” lead weights.
*If possible, first attempt to balance the model by
changing the position of the receiver battery and
receiver. If you are unable to obtain good balance by
doing so, then it will be necessary to add weight to the
nose or tail to achieve the proper balance point.
Special Note: Do not confuse this procedure with
“checking the C.G.” or “balancing the airplane fore
and aft.”
Balance The Airplane Laterally
Balancing Your Model
