Control for helicopter having dual rigid rotors

Details Control for helicopter having dual rigid rotors Control for helicopter having dual rigid rotors

1975-11-13

1977-02-22

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

Responsive to relative working fluid velocity

416 1, 416 33, 416130, 244 1723, B64C 2780

Patent

active

040089797

ABSTRACT:
A control for a helicopter having dual, coaxial, counterrotating rigid rotors which varies the cyclic control phase angle of each rotor in flight as a function of vehicle forward speed to thereby control the coupling of lateral cyclic pitch with longitudinal cyclic pitch so as to introduce differential cyclic pitch inputs which automatically produce aerodynamic moments in each rotor to minimize maneuver generated gyroscopic precession moments, which also produce optimum lateral lift vector displacement for all flight speeds.

REFERENCES:
patent: 2546881 (1951-03-01), Avery
patent: 2748876 (1956-06-01), Daland et al.
patent: 3120276 (1964-02-01), Culver et al.
patent: 3146970 (1964-09-01), Girard
patent: 3199601 (1965-08-01), Dean et al.
patent: 3409249 (1968-11-01), Bergquist et al.
patent: 3521971 (1970-07-01), Cheney
patent: 3570786 (1971-03-01), Lewis
patent: 3620488 (1971-11-01), Miller
patent: 3799695 (1974-03-01), Yamakawa

Affiliated with

Also associated with

Rating

Control for helicopter having dual rigid rotors does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Control for helicopter having dual rigid rotors, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Control for helicopter having dual rigid rotors will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-321958