Helicopter air-spring vibration absorber

Details Helicopter air-spring vibration absorber Helicopter air-spring vibration absorber

1985-01-10

1986-06-24

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With weight-balancing means

Self-shifting or selectively adjustable mass

416500, B64C 2751

Patent

active

045965137

ABSTRACT:
A tunable vibration absorber in a helicopter rotor hub arrangement with a central mass suspended in a symmetrical outer casing over the rotor hub, including an air spring for variably stiffly supporting said central mass in three dimensions.

REFERENCES:
patent: 2576105 (1951-11-01), Childs
patent: 3298443 (1967-01-01), Burkam et al.
patent: 3910720 (1975-10-01), Vincent et al.
patent: 4145936 (1979-03-01), Vincent et al.
patent: 4212588 (1980-07-01), Fradenburgh
patent: 4225287 (1980-09-01), Vincent et al.
patent: 4255084 (1981-03-01), Mouille et al.
patent: 4281967 (1981-08-01), Mouille et al.
R. W. White, A Fixed Frequency Rotor Head Vibration Absorber Based Upon G.F.R.P. Springs, Fifth European Rotorcraft and Powered Lift Aircraft Forum, Sep. 4-7th, 1979, Amsterdam, the Netherlands.

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