Higher harmonic control apparatus for a helicopter rotor
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Aug 12, 1997
Grant Date -
N/A
app pub date -
Feb 21, 1996
filing date -
Feb 28, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A control system has an HHC actuator having a basal portion and a movable portion. A load acting on the control system is detected by a semiconductor gauge. The load detected by the semiconductor gauge is compared with a threshold value in a computer. If the detected load is larger than the threshold load, the movable portion is fixed to the basal portion by a fixing mechanism. By detecting the sign of stall of blades, the HHC actuator is fixed in a neutral position, allowing safe flight. A fixing switch is provided for allowing the fixing mechanism to operate regardless of the result of the comparison with the computer.
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Cited Art Landscape
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