Aerobatics With A Model Helicopter - Reely Redskin Notice D'emploi

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18. Aerobatics with a model helicopter

Aerobatics with a remote-controlled model helicopter is one of the most difficult disciplines of model
flying. Before you attempt manoeuvres such as rolls, loops or inverted hovering, you have to able to
easily get the model helicopter into normal flying position from any flight attitude. Unless you master the
helicopter, attempts at aerobatics will sooner or later result in a crash.
Flight simulators are a good way of training. Some can be downloaded from the Internet free of charge. These
programmes allow you to safely experiment with the control responses of a model helicopter in different flight attitudes
on you computer. For this reason, the transmitter is equipped with a socket at the back to establish a PC connection
with an optionally available interface cable (ill. 1b, pos. 17).
Technical requirements for inverted flight
Both the speed of the main rotor electric motor and the angle of attack of the rotor blades are controlled by the control
stick for the pitch function. The required assignment of control values and mixing of the signals are done in the
transmitter. If the inverted flight toggle switch (ill. 1a, pos. 4) is switched, the assignments and the mix ratio to the
values required for inverted flight are changed.
For better understanding, the table shows some real values for the various angles of attack of the flight attitudes.
1. Normal flight
2. Inverted flight
* The mix ratio of stick position and motor operating voltage is preset by the transmitter electronics and cannot be
changed.
** The mix ratio of stick position and angle of attack is also changed when the switch is operated. It also depends on
the position of both controls (see ill. 1, pos. 5, 6). The use of these two controls has already been described.
Caution!
As you can see in the table, the bottom position of the pitch function control stick does not only change
the angle of attack of the rotor blades. As soon as the inverted flight toggle switch (see ill. 1, pos. 4) is
operated, the main rotor starts abruptly. For this reason, the toggle switch should never be operated
when the helicopter is on the ground with its rotors not moving!
Stick position Motor output*
Top 100%
Middle 65%
Bottom 0%
Stick position Motor output*
Top 100%
Middle 75%
Bottom 100%
Angle of attack**
+9° to +11°
+4° to +6°
0° to +4°
Angle of attack**
+9° to +11°
0°
-9° to -11°
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