Blade-mounted centrifugal pendulum

Details Blade-mounted centrifugal pendulum Blade-mounted centrifugal pendulum

1978-09-11

1980-12-16

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With weight-balancing means

Self-shifting or selectively adjustable mass

416500, B64C 2732

Patent

active

042394554

ABSTRACT:
A helicopter having a multiblade main rotor lift unit includes a plurality of pendulus mass units (48,60) mounted to oscillate in the plane of the rotor. The mass units (48,60) are connected to a rotatable shaft (24) which passes through a blade grip (14) for each blade (16). Vibrations generated in the plane of the rotor system are damped by the oscillating pendulums (22) which are tuned to minimize the vibrations in the lift unit.

REFERENCES:
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patent: 3372758 (1968-03-01), Jenney
patent: 3540809 (1970-11-01), Paul
patent: 3874818 (1975-04-01), Saunders et al.
patent: 3887296 (1975-06-01), Mills et al.
patent: 3932060 (1976-01-01), Vincent et al.
patent: 3988073 (1976-10-01), Eastman et al.

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