PROPELLER FOR SURFACE AND UNDERWATER TRANSPORT Russian patent published in 2004 - IPC

FIELD: propellers for surface and underwater transport; passenger transport and warships. SUBSTANCE: proposed propeller has flat blades mounted on hub and provided with end fences bent towards working surface through angle of 1-90 deg. Maximum height of each bent fence relative to plane of working surface of blade is within 1-10% of propeller diameter. Maximum height of each fence relative to working surface of blade may be equal to 6% of propeller diameter. EFFECT: enhanced efficiency at thrust increment of 30-50%. 2 cl, 4 dwg