Ship's propeller has blades with recesses with coarse surface on the suction side of at least one amounting to many coarse heightened spots to counteract cavitation pressing on the tips thereby reducing pressure impulse energization

摘要

Ship's propeller comprised of blades (2) with marked recesses fixed to a hub (1), has a blade on the suction side of at least one propeller blade with a coarse surface (5,6) which leads to many coarse spots on the surrounding blades' surfaces. The propeller blade is bordered radially by a propeller radius near the tip of the blade and an inner propeller radius as well as tangentially at the spot of maximum section thickness (4) and the outlet edge of the paddle.