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Tail rotor gyro
The HeliCommand features an integral gyro which can be operated in either
normal or heading-lock mode (with AVCS). Use high-speed digital servos for
best performance. Not suitable for "narrow-pulse"-servos.
A second auxiliary channel ("AUX channel") is used to adjust the gain setting,
and to switch between heading-lock and normal mode.
If the AUX channel is not connected to the receiver, the internal default setting
applies. This is heading hold mode set to about +65%; it can be adjusted
using the PC adaptor.
Further adjustments can be made using the PC adaptor, e.g. travel limiting
and collective pitch > tail rotor mixing; the latter is mixed in after the gyro, and
therefore also works in heading lock mode.
The versions 3D and Rigid provide additional „expert" adjustments e.g. delay
and "hold"- range".
If you do not wish to use the integral gyro, an external gyro can be connected
directly to the receiver. In this case please note the following points:
1. turn rates above 400° / sec. are not allowed, since they might seriously
disturb the stabilisation system.
2. you subsequently decide to use the internal gyro, you must first erase any
internal auto-trim values, and check the sensor direction of the gyro.
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