VANE BLADE Russian patent published in 2013 - IPC F03D1/06 

FIELD: power engineering.

SUBSTANCE: vane blade of a rotor wind engine, formed by side surfaces of the streamlined profile, connected by links so that one of them has length from the front edge to the zone of its maximum thickness, and the other one is a fully stretched contour of the hollow wing, having inside the front edge a longitudinal cavity between these side surfaces. The blade is made in the form of a sectioned wing of alternating sequence of the above surfaces turned mutually by 180 degrees in the open streamlined profile. In the front part of the wing this profile is formed by two bent sheet surfaces fixed on a "П"-shaped central wing spar and a connecting angle of the front edge of the wing, and its open sections are formed by the third sheet surface with transverse cuts that do not reach its rear edge, and partially closed by transverse links - half-ribs. Half-ribs provide for through air link between open parts of the third sheet surface fixed on rear edges of two longitudinal sheet surfaces at the central wing spar.

EFFECT: invention increases efficiency of wind usage.

3 cl, 7 dwg