Roll vibration absorber

Details Roll vibration absorber Roll vibration absorber

1989-04-18

1992-06-02

Peters, Jr., Joseph F.

Aeronautics and astronautics

Aircraft, heavier-than-air

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

244 1727, 188379, B64C 2700

Patent

active

051180510

ABSTRACT:
A helicopter (10) is roll vibration resistant having cantilever spring (40) supported masses (42) located at extreme outboard locations (30). The spring portion (40) extends substantially horizontally and is rigidly secured to rigid structure (28). This vibration absorber (34) is tuned to the forced frequency established by the normal rotor (14) RPM times the number of rotor blades (16).

REFERENCES:
patent: 1638782 (1927-08-01), Paton
patent: 3514054 (1970-05-01), Mard et al.
patent: 4042070 (1977-08-01), Flannelly
patent: 4230291 (1980-10-01), Marshall, II
patent: 4311213 (1982-01-01), Desjardins et al.
patent: 4403681 (1983-09-01), Desjardins
patent: 4458861 (1984-07-01), Mouille
patent: 4619349 (1986-10-01), Braun
patent: 4736701 (1988-04-01), Koudo et al.
patent: 4852848 (1989-08-01), Kucera

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