SHPADI PROPELLER (VERSIONS) AND DEVELOPMENT OF ITS BLADES Russian patent published in 2008 - IPC B64C11/20 B63H1/34 F03D1/06 

FIELD: transportation, engines and pumps.

SUBSTANCE: propeller has the blades everyone of which incorporates an initial section of direct acinaciform and the final section of reverse acinaciform. In compliance with first version, the propeller incorporates three and more double-fastening blades the ends of which are linked by means of a ring packing. The second version proposes the propeller with two blades forming a Mobius surface. The blade swept area features an oval rotation shape elongated along the propeller axis. The blades can be made by bending a flat sheet material into coils. The two-blade propeller has its the blades made integral. The surface sections of every propeller located on the propeller rotation axis are developed relative to each other by 90 degrees. The blades are either interconnected directly, or by means of a ring packing, or on the drive shaft extension. The development of the propeller blades represents a flat integral unit made up of spiral-shape elements.

EFFECT: set of inventions simplifies manufacturing the propeller.

22 cl, 12 dwg