FIELD: aviation; wind energy.
SUBSTANCE: invention relates to the design of propellers. The propeller consists of a hub located on the axis of rotation, and two-row blades, more than two in number, mounted radially. The blades are mechanically connected by the butt part with the propeller hub, have a variable angle of inclination of the profile to the plane of rotation along the span - angle of twist. The propeller blades are made of a thin profile of small curvature. The blade tips are mechanically connected to the outer annular frame so that the upper and lower blades of the two-row propeller mechanically stretch the outer annular frame radially and in different directions along the propeller rotation axis.
EFFECT: reduction in the diameter and weight of the propeller.
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