Wind turbine

Details Wind turbine Wind turbine

1984-06-07

1986-12-30

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

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

Responsive to relative working fluid velocity

416 11, 416 51, 416141, F03D 704

Patent

active

046326375

ABSTRACT:
A high speed, downwind horizontal axis wind turbine includes three circumferentially spaced lightweight blades having inner support arms and radially outwardly disposed airfoil configured blade segments which are pivotally connected to the support arms, so as to fold straight downwind under high wind conditions or high rotating speeds. A spring biased control mechanism serves to rotate the airfoil segment of each blade about its longitudinal axis as the blade is folded downwind, so that a simultaneous folding and feathering action is obtained to prevent damage to the turbine in high wind conditions or under high rotating speeds.

REFERENCES:
patent: Re8235 (1878-05-01), Palmer
patent: 612464 (1898-10-01), Stewart
patent: 2054383 (1936-09-01), Ludewig
patent: 2094941 (1937-10-01), Burkhartsmeier
patent: 2516576 (1950-07-01), Jacobs
patent: 2533785 (1950-12-01), Fumagalli
patent: 4310284 (1982-01-01), Randolph

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