SCREW PROPELLER OF KALASHNIKOV'S DESIGN Russian patent published in 2012 - IPC B63H1/14 

FIELD: construction.

SUBSTANCE: screw propeller comprises a hub, adjoined blades, a water scoop and water intake vanes. The blades are of convex-concave cross section. Working surfaces of blades are made in the form of spiral sections and with an angle of inclination to the lower edges of the blades. The screw surface has a hollow truncated cone, where blades are installed. The profile of the blades, evenly swirling by 180 degrees, monotonously reduces when moving away from the screw axis.

EFFECT: increased propeller thrust.

2 cl, 3 dwg