Rotor without flapping hinges and without lead-lag hinges

Details Rotor without flapping hinges and without lead-lag hinges Rotor without flapping hinges and without lead-lag hinges

1978-07-10

1980-05-06

Vrablik, John J.

Fluid reaction surfaces (i.e., impellers)

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

Nonmetallic resilient mounting

416141, 403291, B64C 1112, B64C 1148, F16D 300, B64C 2748

Patent

active

042015154

ABSTRACT:
A rotor, especially for rotary wing aircraft, is constructed without flapping hinges and without lead-lag hinges. The rotor comprises a rigid rotor head and rotor blades secured to the rotor head by flexible coupling rods, for example, made of fiber reinforced composite material. One end of each rod is secured to the rotor head. The other end of each rod is secured to the root of the respective rotor blade. The rods are so arranged that their central longitudinal axes coincide with a generatrix of two coaxial cones having a central axis. One of the cones is located with its base in the respective rotor blade while the other cone is located with its base in the rotor head. This type of structure is surprisingly simple, yet capable of transferring substantial forces between the rotor head on the one hand and the rotor blades on the other hand.

REFERENCES:
patent: 3669566 (1972-06-01), Bourquardez et al.
patent: 3695779 (1972-10-01), Kastan et al.
patent: 3879153 (1975-04-01), Breuner
patent: 3880551 (1975-04-01), Kisovec
patent: 3893788 (1975-07-01), Ditlinger
patent: 4038885 (1977-08-01), Jonda

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