| 摘要 |
PROBLEM TO BE SOLVED: To provide a propeller for which a cavitation is reduced without increasing the blade area, and at the same time, of which the propeller efficiency is increased. SOLUTION: For this propeller blade 1A, in a propeller which is used for a ship, a flap 11 which is formed to have a specified blade lengthβand a specified blade angleαis provided in a rear edge side specified region 5 on the propeller rear edge h side from a specified position (0.6R) on the blade root section side to the blade distal end (1.0R) side. Also, a distal end side specified region 7 from a specified position (0.7R) on the blade root side to the blade distal end (1.0R) side is formed into a shape wherein a pitch ratio is reduced by a specified straight line distribution or a specified curved line distribution. COPYRIGHT: (C)2005,JPO&NCIPI
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