VTOL altitude hold system with automatic ground effect compensation
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United States of America Patent
Stats
-
Jul 29, 1986
Grant Date -
N/A
app pub date -
Feb 16, 1983
filing date -
Feb 16, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
During a transition of a VTOL aircraft such as a helicopter, from one altitude held without its ground effect zone to another to be held within its ground effect zone, or vice versa, a collective stick position synchronizer which can memorize the proper trim condition at the previous altitude in conjunction with the stick force sensor out-of-detent logic and a low vertical speed sensor, together constituting a ground effect zone detector, is used to drive the collective stick trim actuator in a direction which relieves any force being exerted by the pilot in order to maintain the new commanded altitude.
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