Helicopter blade and rotor

Details Helicopter blade and rotor Helicopter blade and rotor

1977-07-13

1978-12-19

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Sectional, staged or nonrigid working member

416138, 416141, 416228, 416240, B64C 2738, B64C 2746

Patent

active

041303776

ABSTRACT:
A torsionally compliant helicopter blade having its aerodynamic center axis positioned selectively forward of its center of gravity and elastic axes throughout a selected portion of the blade span so that, during operation, the blade will experience airloading which will induce two per rev torsional deflection of the blade to thereby improve rotor performance by reducing the total power required to drive the rotor.

REFERENCES:
patent: 3200887 (1965-08-01), Ballauer
patent: 3232349 (1966-02-01), Ballauer
patent: 3558082 (1971-01-01), Bennie
patent: 3589831 (1971-06-01), Lemnios
patent: 3721507 (1973-03-01), Monteleone
patent: 3822105 (1974-07-01), Jepson
patent: 3902821 (1975-09-01), Robinson
patent: 3926536 (1975-12-01), Ciastula et al.
patent: 3999886 (1976-12-01), Ormiston et al.
patent: 4028003 (1977-06-01), Krauss

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