76 XP6102 - Helicopter Manual
Setting Up Revolution Mixing
Set up the helicopter so that it will hover
with the tail rotor trim centered. Establish
the helicopter into a stable hover, then
steadily increase the throttle to initiate a
steady climb. The body of the helicopter
will move in the opposite direction to the
main rotor rotation. Increase the U, or Up,
setting until the helicopter climbs with no
tendency to turn. At a safe altitude, close
the throttle; the helicopter will descend
and the body will turn in the same
direction as the main rotor rotation.
Increase the D, or down, mix until the
helicopter descends with no tendency to
turn. Throttle stick movements should be
slow, and the initial acceleration and
deceleration swings should be ignored.
The Acceleration Mixing function is
provided to compensate for the main rotor
acceleration (and deceleration) torque.
The magnitude and duration of the signal
to the tail rotor depends Upon the rate of
the throttle changes. Thus, quick, jerky
throttle inputs will yield more noticeable
tail compensation.
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