WATER-JET PROPELLER Russian patent published in 2014 - IPC B63H1/26 

FIELD: engines and pumps.

SUBSTANCE: invention relates to ship building, particularly, to water-jet propulsors to drive high-speed vessels and yachts. Water-jet propeller comprises cylindrical hub, blades with leading and trailing sections, fixed cylindrical adapter, blade pitch and stationary blades. Said blades feature variable pitch. However, blade variable pitch at inlet is larger than that at outlet while fixed adapter accommodates stationary opposite-direction blades with respect to blade profile direction recessed in adapter case.

EFFECT: higher efficiency, better stability at air ingress and cavitation.

2 dwg