| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide contra-rotating propellers and a ship capable of suppressing the occurrence of erosion and improving propulsion efficiency. <P>SOLUTION: The rake B of a front propeller 2 is formed to be curved backward over a range from a first intermediate point 22 located between a rotation axis A and a blade end portion 21 to the blade end portion 21. The rake C of a rear propeller 3 is formed to be curved forward over a range from a second intermediate point 32 located between a rotation axis A and a blade end portion 31 to the blade end portion 31, wherein the radius R3 of the rear propeller 3 is formed to be smaller than the radius R2 of the front propeller 2. <P>COPYRIGHT: (C)2012,JPO&INPIT |
