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US 2006/0049303 A1Published application
Mechanical density altitude compensation device for helicopter tail rotors
OwnerDarrell Wilkersoninventor
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OwnerDarrell Wilkersoninventor
Estimating the term…
A helicopter tail rotor pitch-range altering device is disclosed. The device is incorporated into the existing helicopter tail rotor pitch-change control system of a helicopter and automatically alters the amount of tail rotor pitch available from the helicopter's tail rotor pitch-change control system based on changes in density altitude. The device comprises an ambient air density sensing device and a movable member located within or located in proximity to the helicopter tail rotor pitch-change flight control system. In one embodiment, a sealed bellows is connected directly to a movable member within the helicopter tail rotor pitch-change control system. As density altitude changes, the length of the bellows changes accordingly and moves the movable member within the helicopter's tail rotor pitch-change control system providing a varying tail rotor pitch-range based on density altitude.
An air density compensation device for a helicopter tail rotor pitch-change control system, the air density compensation device comprising (1) a mechanical air sensing device having a moving member that moves in response to changes in ambient air pressure, ambient air temperature, ambient air moisture content or a combination of two or more thereof and (2) a movable mechanism attached to the moving member of the mechanical air sensing device and movable in response to movement of the moving member of the mechanical air sensing device, said movable mechanism adapted to engage with at least one linkage member of a helicopter tail rotor pitch-change control system such that the range of pitch through which the helicopter tail rotor can be varied by the helicopter tail rotor pitch-change control system is altered in response to movement of the moveable mechanism.
A helicopter tail rotor pitch-range control mechanism comprising:
Dependencies are inferred from the claim text.