9.
Motor Commissioning
a) Inserting the Drive Battery
After removing the canopy, the flight battery is pushed into the fuselage from the front and secured with hook-and-loop
tape. The precise position of the rechargeable battery is determined by the centre of gravity.
b) Setting the Centre of Gravity
The flight battery (1) must be installed in the
fuselage so that the centre of gravity is ap-
prox. 50-55 mm behind the leading edge of the
wing.
To do so, mark the corresponding centre of gra-
vity position at the wing with a pen.
Use your index fingers to hold the assembled
and ready-to-fly model from below at the mea-
sured positions. If the centre of gravity is set
correctly, the model should be leaning slightly
forward.
Always measure the centre of gravity with the
cabin hood in place.
For the first flights, please set the centre of gra-
vity at 50 mm. The best centre of gravity then
can be reset slowly.
The rechargeable battery must be secured in the plane, e.g. with hook-and-loop tape, since it may otherwise
come loose in flight. This would lead to a sudden change of the centre of gravity and thus make the airplane
difficult to control or even cause a crash.
Glue one hook-and-loop tape each to the bottom of the battery and the bottom of the fuselage to effectively prevent
sliding to the front or the rear.
When you have determined the centre of gravity, mark the flight battery and the fuselage using a pen. Thus, when you
change the flight battery, you do not have to determine the centre of gravity again.
42
Figure 15