Wind turbine

Details Wind turbine Wind turbine

1979-06-08

1981-10-27

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

With control means responsive to non-cyclic condition...

Plural diverse condition responsive

416 41, 416 24, F03D 704

Patent

active

042970768

ABSTRACT:
An improved wind turbine in which the tip portions of the blades are variable in pitch and are cyclically varied in pitch to control the yaw of the rotor and to relieve bending moments on the blades and are collectively varied in pitch to relieve bending moments on the blades and to maximize the power output of the turbine at a selected constant rotor speed.

REFERENCES:
patent: 2037528 (1936-04-01), Miller
patent: 2152984 (1939-04-01), Wilford
patent: 2622686 (1952-12-01), Chevreau et al.
patent: 2865459 (1958-12-01), Perdue
patent: 3589831 (1971-06-01), Lemnios et al.
patent: 3874816 (1975-04-01), Sweeney et al.
patent: 3902072 (1975-08-01), Quinn
patent: 4084921 (1978-04-01), Norz
patent: 4160170 (1979-07-01), Harner et al.
patent: 4180372 (1979-12-01), Lippert
patent: 4201514 (1980-05-01), Huetter
Machine Design, vol. 48, No. 12, May 20, 1976, pp. 18-20, 23-26.

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