Weight and balance considerations of a helicopter are
similar to those of an airplane, except they are far more
critical, and the CG range is much more limited. [Figure
6-1] The engineers who design a helicopter determine
the amount of cyclic control power that is available, and
establish both the longitudinal and lateral CG envelopes
that allow the pilot to load the helicopter so there is
sufficient cyclic control for all flight conditions.
If the CG is ahead of the forward limit, the helicopter
will tilt, and the rotor disk will have a forward pull. To
counteract this, rearward cyclic is required. If the CG is
too far forward, there may not be enough cyclic authority
to allow the helicopter to flare for a landing, and it will
consequently require an excessive landing distance.
Weight and balance considerations of a helicopter are
similar to those of an airplane, except they are far more
critical, and the CG range is much more limited. [Figure
6-1] The engineers who design a helicopter determine
the amount of cyclic control power that is available, and
establish both the longitudinal and lateral CG envelopes
that allow the pilot to load the helicopter so there is
sufficient cyclic control for all flight conditions.
If the CG is ahead of the forward limit, the helicopter
will tilt, and the rotor disk will have a forward pull. To
counteract this, rearward cyclic is required. If the CG is
too far forward, there may not be enough cyclic authority
to allow the helicopter to flare for a landing, and it will
consequently require an excessive landing distance.
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