Composite rotor blade root end

Details Composite rotor blade root end Composite rotor blade root end

1979-03-15

1981-01-27

Vrablik, John J.

Fluid reaction surfaces (i.e., impellers)

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

Plural articulation

416226, 416230, B64C 2748

Patent

active

042472555

ABSTRACT:
A helicopeter rotor blade fabricated from laminated fiber-reinforced resin includes a blade root end attachment to the rotor hub that provides a structural extension capable of developing chordwise bending moment continuity across a single-pin joint. The extension is a spanwise continuation of the nose block and heel portions of the spar and continues inboard of the blade attachment pin about which the primary axial load-carrying portions of the spar are wrapped. The structural extension is formed as an integral part of the blade spar without secondary bonding or the use of pre-formed fittings.

REFERENCES:
patent: 3476484 (1969-11-01), Brunsch
patent: 3674379 (1972-07-01), Monti
patent: 3950115 (1976-04-01), Euler
patent: 4120610 (1978-10-01), Braswell et al.

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