FIELD: aeronautics.
SUBSTANCE: invention relates to propellers used in aircraft and wind power studies. Aerodynamic screw contains a butt part that is executed the same for all blades. Internal and external surfaces of the blades are parallel to each other. The front edge of the blade is made with beveled surfaces and the radius of the middle part and the rear edge is made with a bevel to the outer surface at an angle of bevel of 10 ... 15 ' and radius facing the inner surface. The blades are to form a cone n = 120 ... 170'. The perimeter of the blade feather is defined under the curve of equal width. Feathers of the blades can be separated by the line of curve portion implementation of the of equal width, or by the line, which is parallel to the line segment of the curve of equal width, located across the width of the blade. Each feather is located in a single plane with a turn of the front edge from the cone forming at an angle = 0 ... 30 '.
EFFECT: propeller blades can be arranged with alternation of full, separated and cut feathers.
1 dwg
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