Plastics multi-blade variable-pitch rotor

Details Plastics multi-blade variable-pitch rotor Plastics multi-blade variable-pitch rotor

1992-10-14

1994-02-08

Bertsch, Richard A.

Fluid reaction surfaces (i.e., impellers)

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

Nonmetallic resilient mounting

416131, 416230, B64C 2748

Patent

active

052844200

ABSTRACT:
A multi-blade rotor (1), especially for a helicopter rear anti-couple propeller, includes a hub body (3) to which are connected twistable straps (11 to 17) each formed by two bundles (20) of fibers with a flattened cross section arranged radially around the hub (3), each of the bundles (20) forming at least two halves of different blades (11 to 17) and being twisted and curved in the region of its passage near the center of the hub body (2) in such a way that it forms a tangent to the circumference of the center of the hub body (3) along the greater dimension of its cross section.

REFERENCES:
patent: 3669566 (1972-06-01), Bourquardez et al.
patent: 3762834 (1972-10-01), Bourquardez et al.
patent: 3765267 (1973-10-01), Bourquardez et al.
patent: 3950115 (1976-04-01), Euler
patent: 4281966 (1981-08-01), Duret et al.
patent: 4626173 (1986-12-01), Mouille et al.
patent: 4898515 (1990-02-01), Beno et al.

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