Flexure having pitch flap coupling

Details Flexure having pitch flap coupling Flexure having pitch flap coupling

1976-05-10

1977-07-26

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Plural articulation

416134A, 416226, 416230, 416241A, 416132A, B64C 2744

Patent

active

040379884

ABSTRACT:
A flexure for connecting the root end of a rotor end of a rotor blade to a rotor hub in a bearingless rotor assembly. The flexure inherently induces a change in pitch angle in accordance with a change in flap angle. The flexure, which may form an integral portion of the rotor blade, is constructed of a composite material made of fibers secured to one another by a bonding agent. The fibers are arranged in two sets. The variation of the blade pitch angle in accordance with the blade flap angle is accomplished by either varying the number of fibers between the two sets or varying the angle of each set to the longitudinal axis of the flexure, or both.

REFERENCES:
patent: 3232349 (1966-02-01), Ballauer
patent: 3237697 (1966-03-01), Ford et al.
patent: 3310117 (1967-03-01), Slivinsky et al.
patent: 3484174 (1969-12-01), McCoubrey
patent: 3528753 (1970-09-01), Dutton et al.
patent: 3552881 (1971-01-01), Rogers et al.
patent: 3669566 (1972-06-01), Bourquardez et al.
patent: 3713753 (1973-01-01), Brunsch
patent: 3874820 (1975-04-01), Fenaughty
patent: 3926536 (1975-12-01), Ciastula et al.
patent: 3999886 (1976-12-01), Ormiston et al.

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