Fluid reaction surfaces (i.e. – impellers) – Articulated – resiliently mounted or self-shifting impeller... – Including movement limit stop or damping means
Patent
1984-09-28
1988-04-19
Croyle, Carlton R.
Fluid reaction surfaces (i.e., impellers)
Articulated, resiliently mounted or self-shifting impeller...
Including movement limit stop or damping means
416142, 416143, B64C 2735
Patent
active
047385928
ABSTRACT:
A system for folding a helicopter rotor blade in which the lead-lag damper is mounted to the rotor blade spar, attached to the pitch housing and centered at the vertical pin flap hinge axis. This design of the lead-lag damper corresponding to a specially designed cam has a single actuator used to fold the rotor blade by sequentially engaging the cam with the actuator and lead-lag damper. Connected to the lead-lag damper is a lead-lag damper linkage assembly which is located in the operative position of the rotor blade so that flight loads are transferred directly to the pitch housing thereby uncoupling the actuator and cam from the path of these loads. In addition, this linkage is connected over center during blade folding so that the rotor blade cannot be back driven.
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Croyle Carlton R.
Olds Ted
The Boeing Company
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