Aeronautics and astronautics – Aircraft – heavier-than-air – Airplane and helicopter sustained
Patent
1989-05-05
1992-02-04
Peters, Jr., Joseph F.
Aeronautics and astronautics
Aircraft, heavier-than-air
Airplane and helicopter sustained
244 6, 244 17250, 416142, 416168R, 416104, 416160, B64C 2722
Patent
active
050853155
ABSTRACT:
A blade pitch control system for a rotary wing aircraft which incorporates a mast and rotor which is pivotally adapted for movement of the mast between a generally horizontal stored position and a vertical position for operation in a helicopter mode. The pitch control system incorporates a motion amplification mechanism such as a star gear arrangement connected to the pitch horn to amplify control motions which are transmitted to the pitch horns through a push-pull control tube generally parallel to the folding axis of the rotor blade. In another embodiment, the push-pull tube inputs parallel to the mast axis. A locking mechanism retains the blades so pitch changes cannot be made during a predetermined portion of the blade coning cycle.
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patent: 2684213 (1954-07-01), Robert et al.
patent: 3404852 (1968-10-01), Sambell et al.
patent: 3515500 (1970-06-01), Nachod
patent: 3528630 (1970-09-01), Ferris et al.
patent: 3592412 (1971-07-01), Glatfelter
patent: 3729276 (1973-04-01), Boyadjieff et al.
patent: 4750862 (1988-06-01), Barnes et al.
Bidwell Anne E.
Nelson Gregory J.
Peters Jr. Joseph F.
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