Cyclic pitch control having torsion spring system

Details Cyclic pitch control having torsion spring system Cyclic pitch control having torsion spring system

1995-02-17

1996-04-30

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

416141, B64C 2754

Patent

active

055119476

ABSTRACT:
A pitch control system for a vertically launchable and recoverable winged aircraft includes a collective and cyclic pitch control system, a drive yoke and a rotor hub. The collective and cyclic pitch control system is operably connected to two proprotor blades to cyclically control the pitch of each proprotor blade, so that the aircraft is capable of controlled helicopter mode flight when the aircraft body is pointed in a generally upward direction. Proprotor blade flapping caused by applying cyclic pitch control results in teetering of the rotor hub with respect to the drive yoke. Torsion bar springs are used with suitable mechanical linkages to resist this teetering motion and generate the hub moment which is transmitted to the airframe and used to maneuver the aircraft.

REFERENCES:
patent: 3941503 (1976-03-01), Bruel
patent: 4178130 (1979-12-01), Ferris et al.
patent: 4349316 (1982-09-01), Hughes et al.
patent: 4430045 (1984-02-01), Cresap

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