Rotor hub for a helicopter

Details Rotor hub for a helicopter Rotor hub for a helicopter

1978-07-12

1980-02-19

Vrablik, John J.

Fluid reaction surfaces (i.e., impellers)

Drive by fluid reaction jet on working member

Articulated or flexible connection

416141, B64C 2104, B64C 1106

Patent

active

041892836

ABSTRACT:
A rotor hub for a helicopter having a hum member rotatably mounted to a rr mast stationarily attached to the fuselage of a helicopter and forming an air plenum for circulation control. A shaft, which is driven from a transmission, drives a torque plate which is attached to the top of the hub member. A flexible hub plate is attached to a flange on the hub member and has a plurality of axles to which the rotor blades are individually attached. Air from inside the plenum is piped to the rotor blades through flexible ducts. The flexible hub plate is designed to provide a high degree of stiffness in the plane of rotation and a lesser degree of stiffness in a plane normal to the plane of rotation.

REFERENCES:
patent: 2845131 (1958-07-01), Laufer
patent: 3524711 (1970-08-01), Cheeseman et al.
patent: 3567332 (1971-03-01), Seed
patent: 3612444 (1971-10-01), Girard
patent: 4040578 (1977-08-01), Yuan
patent: 4080098 (1978-03-01), Watson

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