PROPELLER Russian patent published in 2007 - IPC B63H1/26 

FIELD: shipbuilding; construction of propellers for various ships.

SUBSTANCE: proposed propeller is provided with flat blades with leading and trailing edges and end tips. Blades are mounted on cylindrical or ellipsoid hubs at pitch angle. Planes of propeller blades are inclined relative to hub longitudinal axis at angle lesser than 90^o and more than 30^o. Propeller blades may be made in form of rectangular plates. End tips of propeller blades may be rectilinear in form. It is good practice to select propeller pitch angle between 0^o and 60 degrees. Propeller blades may be made in form of unsymmetrical plates, acinaci-shaped plates for example.

EFFECT: enhanced efficiency; facilitated procedure of manufacture of propeller.

5 cl, 2 dwg