Helicopter rotors

Details Helicopter rotors Helicopter rotors

1979-11-07

1981-12-29

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Plural articulation

416138, B64C 2740

Patent

active

043079962

ABSTRACT:
A helicopter rotor has at least one pair of diametrically opposed rotor blades interconnected by a strap member flexible in torsion and in a plane perpendicular to a plane of rotation and stiff in a plane coincident with the plane of rotation. A torsionally flexible tie-bar having a tensile elastic modulus greater than that of the strap member is extended between pivotal attachments adjacent opposed ends of the interconnecting strap member.
In operation, a major portion of centrifugal loads caused by the rotating blades is carried by the tie-bar.

REFERENCES:
patent: 4008980 (1977-02-01), Noehren et al.
patent: 4111605 (1978-09-01), Roman et al.
patent: 4182597 (1980-01-01), Derschmidt
patent: 4201515 (1980-05-01), Derschmidt et al.
patent: 4251188 (1981-02-01), Schwarz et al.

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