Helicopter rotors

Details Helicopter rotors Helicopter rotors

1983-06-20

1985-04-09

Garrett, Robert E.

Fluid reaction surfaces (i.e., impellers)

Having frangible or fusible part or connection

416244R, 403 11, B64C 1102

Patent

active

045098980

ABSTRACT:
A helicopter rotor includes attachment means for attaching a rotor hub to a tubular rotor drive shaft in a manner establishing a primary thrust load path and further attachment means adapted to provide a normally passive secondary thrust load path and operative automatically to retain the rotor hub in the event of a failure in the primary thrust load path. In the described embodiments the further attachment means comprise a multi-part collet consisting of a plurality of identical collet parts located internally of the drive shaft. Each collet part has an external frusto-conical surface one end for location adjacent a mating surface formed internally of the drive shaft, and a radially extending flange portion at its other end for attachment to an end surface of the drive shaft.

REFERENCES:
patent: 2464463 (1949-03-01), Roby
patent: 3761199 (1973-09-01), Ferris et al.
patent: 3972491 (1976-08-01), Ferris et al.
patent: 4201513 (1980-05-01), Sales
Navy Technical Disclosure Bulletin, vol. 6, No. 6, Jun. 1981, pp. 27-30.

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