Damper means for helicopter rotors
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United States of America Patent
Stats
-
Feb 10, 1981
Grant Date -
N/A
app pub date -
Dec 5, 1977
filing date -
Dec 8, 1976
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A helicopter rotor includes a rotor head having, for each of a plurality of rotor blades, an elastomeric bearing and a damper that is arranged to provide controlled restraint of rotor blade movement in both the flap and lead/lag planes. The damper can be arranged to exhibit either substantially equal stiffness in both operational planes or any desired stiffness ratio. In a preferred embodiment of the latter arrangement, the desired stiffness in the respective planes are provided by separate components incorporated in the single damper. The damper may be situated either inboard or outboard of the elastomeric bearing.
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