Torsionally compliant helicopter rotor blade with improved stabi

Details Torsionally compliant helicopter rotor blade with improved stabi Torsionally compliant helicopter rotor blade with improved stabi

1976-04-12

1977-06-07

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Plural articulation

416132R, 416226, 416241A, B64C 2744

Patent

active

040280039

ABSTRACT:
A torsionally compliant helicopter rotor blade with maximum blade torsional flexibility at the blade tip portion and so shaped at the blade root portion that the locus of shear centers and the locus of centers of lift are substantially coincident, and so shaped at the tip portion so that the locus of shear centers is selectively forward of the locus of centers of lift to establish an aerodynamic restoring moment in response to blade tip torsional excursions, thereby improving blade torsional stability.

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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