| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a propeller with replaceable blades which is attached to a core unit without a screw and hence removes tension normally existing around the screw and at the same time increases the strength of an entire device. Ž<P>SOLUTION: A marine stationary pitch propeller includes a central core unit 1 to which the replaceable blades are attached; and a plurality of blades equiangularly distributing and surrounding the core unit and attached to the central core 1. The core 1 has a columnar structure having the same number of surfaces as the number of the blades 2, and each of side surfaces thereof has a tapered groove 6 serving as a narrow port. The internal ends of these blade 2 are covered by headers, respectively. These headers are connected to one of the side surfaces of the core unit. A rib having a complementary shape with respect to the groove 6 is disposed at the center of each of these headers. A means 8 for axially fixing these headers of the blades to the core unit 1 is also provided. Ž<P>COPYRIGHT: (C)2010,JPO&INPIT Ž
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