Great Planes Super Sportster Brushless EP ARF - GPMA1161 - Manual (Page 18)

18
NOTE: The throws are measured at the widest part of the
elevators, rudder and ailerons. If you are using a ruler to
set your control surface throws, the defl ection distance is
measured as the height from the center TE of the control
surface when moved from the neutral position as shown
in the sketch. Defl ection in degrees is also provided for an
alternative measuring method.
These are the recommended control surface throws:
ELEVATOR
HIGH RATE LOW RATE
1/2"
[13mm]
12°
Up
1/2"
[13mm]
12°
Down
3/8"
[10mm]
9°
Up
3/8"
[10mm]
9°
Down
RUDDER
1"
[25mm]
18°
Right
1"
[25mm]
18°
Left
3/4"
[19mm]
13°
Right
3/4"
[19mm]
13°
Left
AILERONS
3/8"
[10mm]
25°
Up
3/8"
[10mm]
25°
Down
1/4"
[6mm]
16°
Up
1/4"
[6mm]
16°
Down
IMPORTANT: The Super Sportster EP BL ARF has been
extensively fl own and tested to arrive at the throws at
which it fl ies best. Flying your model at these throws will
provide you with the greatest chance for successful fi rst
fl ights. If, after you have become accustomed to the way
the Sportster fl ies, you would like to change the throws to
suit your taste, that is fi ne. However, too much control throw
could make the model diffi cult to control, so remember,
“more is not always better.”
Balance the Model (C.G.)
More than any other factor, the C.G. (balance point) can
have the greatest effect on how a model fl ies, and may
determine whether or not your fi rst fl ight will be successful.
If you value this model and wish to enjoy it for many fl ights,
DO NOT OVERLOOK THIS IMPORTANT PROCEDURE.
A model that is not properly balanced will be unstable and
possibly unfl yable.
At this stage the model should be in ready-to-fl y condition
with all of the systems in place including the motor, landing
gear, battery pack, and the radio system.
❏
1. Use a felt-tip pen or 1/8" [3mm]-wide tape to accurately
mark the C.G. on the top of the wing on both sides of the
fuselage. The C.G. is located 2-3/4" [70mm] back from the
leading edge of the wing at the fuselage.
This is where your model should balance for the fi rst fl ights.
Later, you may wish to experiment by shifting the C.G. up to
1/4" [6mm] forward or 1/4" [6mm] back to change the fl ying
characteristics. Moving the C.G. forward may improve the
smoothness and stability, but the model may then require
more speed for takeoff and make it more diffi cult to slow
for landing. Moving the C.G. aft makes the model more
maneuverable, but could also cause it to become too
diffi cult to control. In any case, start at the recommended
balance point and do not at any time balance the model
outside the specifi ed range.
❏
2. With all parts of the model installed (ready to fl y) and
the battery pack installed, place the model on a Great Planes
CG Machine
™ , or lift it at the balance point you marked.
❏
3. If the tail drops, the model is “tail heavy” and the battery
pack and/or receiver must be shifted forward to balance. If the
nose drops, the model is “nose heavy” and the battery pack
and/or receiver must be shifted aft to balance. If possible,
move the battery pack and receiver to minimize or eliminate
any additional ballast required.
❏
4. IMPORTANT: If you found it necessary to move the
battery pack or receiver for the Sportster to balance, recheck
the C.G. after this has been done.