Fluid reaction surfaces (i.e. – impellers) – Specific blade structure – Irregular – flanged or channel forming blade surface
Patent
1977-06-10
1980-05-13
Powell, Jr., Everette A.
Fluid reaction surfaces (i.e., impellers)
Specific blade structure
Irregular, flanged or channel forming blade surface
416223R, 416157R, B64C 1118
Patent
active
042026555
ABSTRACT:
Propeller and fan blading comprised of an extruded airfoil having a rib retained at the root for mounting and with a portion thereof removed by flattening the back of the blade truncating the back camber thereof in a plane tapered toward the blade tip with respect to the front camber thereof and having a flap of full configuration toward the root of the blade and continuing tangent from the front camber and extending angularly back from the back camber and reduced toward the blade tip by profiling the trailing edge made thin toward said tip by a flattening truncating the back trailing portion of the blade toward said tip, the said blading being controllably pitched and feathered by a hub having cylinder and piston means responsive to engine oil pressure and rotating the blades on their radial axes to a full pitch position by link and lever means biased toward a feathered position by an adjustor means having adjustable stops and means for maintaining moderate pitch until the engine is stopped.
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patent: 1068946 (1913-07-01), Taylor
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patent: 2880496 (1959-04-01), Benedict et al.
patent: 2938585 (1960-05-01), Fanti
patent: 3119453 (1964-01-01), Haig
patent: 3200477 (1965-08-01), Shultz
patent: 3239011 (1966-03-01), Brownlee
Product Engineering, Jul. 6, 1970, pp. 92-93.
Maxwell William H.
Powell Jr. Everette A.
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