Helicopter rotor and transmission mounting and vibration isolati

Details Helicopter rotor and transmission mounting and vibration isolati Helicopter rotor and transmission mounting and vibration isolati

1976-12-09

1978-09-05

Kelmachter, Barry L.

Aeronautics and astronautics

Aircraft, heavier-than-air

Helicopter or auto-rotating wing sustained, i.e., gyroplanes

188 1B, 248 5, 248358R, 416500, B64C 2700

Patent

active

041113861

ABSTRACT:
A helicopter rotor and transmission mounting and vibration isolation system in which the transmission is supported from the fuselage by a plurality of elastomeric mounts which are selectively positioned and focused to establish a system roll axis and a system pitch axis on opposite sides of the elastomeric mounts and which mount members are of selected stiffness to establish selected roll stiffness and selected pitch stiffness of the system, to establish the natural frequencies of the system sufficiently below the blade passage frequency to minimize the response of the fuselage to forces and moments imparted by the helicopter rotor and to provide selected torque restraint and lift restraint for the system.

REFERENCES:
patent: 2648509 (1953-08-01), Henshaw
patent: 2722391 (1955-11-01), Krieghoff
patent: 3858831 (1975-01-01), Halwes
patent: 3920202 (1975-11-01), Mouille
patent: 3932060 (1976-01-01), Vincent et al.
patent: 4014484 (1977-03-01), Mouille

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