Rotary-wing aircraft rotor head having resilient-return interbla

Details Rotary-wing aircraft rotor head having resilient-return interbla Rotary-wing aircraft rotor head having resilient-return interbla

1989-04-26

1990-04-10

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Including movement limit stop or damping means

416107, 416141, B64C 2738

Patent

active

049155857

ABSTRACT:
The invention relates to a rotor head having interblade ties with resilient return in lag and with built-in damping, wherein each tie is connected, to each of the two rotor blades joined by it, by articulation means comprising a main ball retained on a member connecting a blade to the hub and centered on or in immediate proximity to the pitch change axis of the corresponding blade.
A single main ball may be connected to the adjacent ends of two neighboring ties by a connection member having the shape of a V open towards the hub, or else each tie is connected to a connection member by a respective one of two main balls offset transversely in relation to the pitch change axis of the blade and/or radially along said axis.
Application to the main and/or auxiliary rotors of helicopters.

REFERENCES:
patent: 1948458 (1934-02-01), De La Cierva
patent: 2494985 (1950-01-01), Campbell
patent: 2640553 (1953-06-01), Hafner
patent: 2640554 (1953-06-01), Campbell
patent: 3302726 (1967-02-01), Stanley
patent: 3310119 (1967-03-01), Watson
patent: 3361216 (1968-01-01), Walker
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patent: 3807897 (1974-04-01), Lucien
patent: 4342540 (1982-08-01), Lovera et al.
patent: 4512717 (1985-04-01), Pancotti et al.
patent: 4568245 (1986-02-01), Hibyan et al.

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