Helicopter blade

Details Helicopter blade Helicopter blade

1977-11-11

1979-03-06

Powell, Jr., Everette A.

Fluid reaction surfaces (i.e., impellers)

Specific blade structure

Radial flow devices

416226, 416228, B64C 2746

Patent

active

041428374

ABSTRACT:
A helicopter blade of improved airfoil shape which reduces or eliminates retreating blade stall by reducing the magnitude of the upper airfoil blade surface peak pressure and distributes it over a greater chord section of the blade to thereby reduce flow separation and drag.

REFERENCES:
patent: 3728045 (1973-04-01), Balch
patent: 3822105 (1974-07-01), Jepson
patent: 3999888 (1976-12-01), Zincone

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