Connecting element and helicopter rotor incorporating same

Details Connecting element and helicopter rotor incorporating same Connecting element and helicopter rotor incorporating same

1982-06-01

1984-06-19

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Nonmetallic resilient mounting

416138, B64C 2738

Patent

active

044551231

ABSTRACT:
A connecting element having end regions (22, 23) joined by an intermediate by an intermediate region (26) is constructed of a plurality of fibre filaments extending longitudinally and continuously throughout its length. The fibers in the end regions are embedded in a thermo-setting resin matrix material and the fibres in the intermediate region are embedded in a resilient matrix material thereby permitting relative resilient torsional movement of the end regions about a longitudinal axis. Such a connecting element is particularly suited for use in a helicopter rotor and several embodiments are described and illustrated. In all embodiments the torsional flexibility of intermediate region (26) provides for blade feathering movements and in a preferred embodiment the inner end region (22) is constructed so as to be resiliently flexible in a blade flap plane and the outer end region (23) is constructed so as to be equally resiliently flexible in the blade flap and lead/lag planes.

REFERENCES:
patent: 3669566 (1972-06-01), Bourquardez et al.
patent: 3692361 (1972-09-01), Ivarsson
patent: 3762834 (1973-10-01), Bourquardez et al.
patent: 3765267 (1973-10-01), Bourquardez et al.
patent: 4038885 (1977-08-01), Jonda
patent: 4183261 (1980-01-01), Eiselbrecher et al.
patent: 4227859 (1980-10-01), Gouzien et al.
patent: 4255087 (1981-03-01), Wackerle et al.

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