Rotor blade especially for rotary wing aircraft

Details Rotor blade especially for rotary wing aircraft Rotor blade especially for rotary wing aircraft

1979-02-26

1981-02-24

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Articulated, resiliently mounted or self-shifting impeller...

Plural articulation

416138, B64C 2738

Patent

active

042525039

ABSTRACT:
A rotor blade has a neck section which connects the blade proper to a rotor ead at the blade root. The neck section is flexible against bending in the lead-lag direction and in the flapping direction. A carrier member is located alongside or inside the neck section but spaced from the neck section. The carrier member is resistant against bending at least in the lead-lag direction or in the flapping direction. The carrier member is rigidly connected at its one end to the blade proper. A layer of a damping material is operatively interposed between the carrier member and the neck section, preferably at the blade root end of the neck section, whereby blade vibrations preferably in the lead-lag direction are damped and substantially prevented from entering into the rotor head.

REFERENCES:
patent: 2949967 (1960-08-01), Jovanovich
patent: 3231222 (1966-01-01), Scheutzow
patent: 3261407 (1966-07-01), Culver et al.
patent: 3330362 (1967-07-01), Kastan
patent: 3669566 (1972-06-01), Bourquardez et al.
patent: 3999886 (1976-12-01), Ormiston et al.
patent: 4008980 (1977-02-01), Noehren et al.
patent: 4037988 (1977-07-01), Laird
patent: 4053258 (1977-10-01), Mouille
patent: 4093400 (1978-06-01), Rybicki
patent: 4104003 (1978-08-01), Mouille

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