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The HELI ALT Hold was designed
to help the pilot maintain desired
altitude when filming or taking
pictures from RC helicopter.
It can maintain present altitude, or
programmed altitude. As its side
function it can generate constant
servo signal to free a channel on
the transmitter. Example: gyro or
governor sensitivity setting.
It works only if there is another
devise mixing the CCPM servos
signals on the board of your
machine. (For example
Helicommand or similar devices.)
Heli ALT HOLD
pdf file