PROPELLER BLADES Russian patent published in 2012 - IPC B64C11/10 B64C11/16 

FIELD: aeronautics.

SUBSTANCE: invention relates to propeller blades used in air and wind power studies. The blade of the propeller contains butt part and a feather. Blade feather is made of sheet blank with parallel to the internal and external surfaces. The perimeter of the blade feather is made by the curve equal to (constant) width. Lobby edge has a bevel at surfaces and the radius in the middle of the edge. The rear edge of the blade is made with a bevel around the perimeter of side of the outer surface and the radius that goes on the inner surface. A propeller blade feather can be made with separated by an interval of equal width curve performance in the presence of straight leading edge with the relevant elements, and the trailing edge with a bevel. Blades feather can be made truncated with a decrease in the size of the blades within a line parallel to the segment of the curve formation of equal width, in the presence of a leading and trailing edge and the butt of blade feather. A propeller blade feather can be bent relative to the plane of rotation around a cylinder radius of which is determined by the dependence of R = 100 ... 1000 o, where o is the thickness of the sheet.

EFFECT: broadening and improving of aerodynamic characteristics are being gained.

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