| 摘要 |
PROBLEM TO BE SOLVED: To provide a spiral barrel propeller saving energy and having high performance by an extremely simple means. SOLUTION: Propulsive force in a fixed direction is induced by a spiral rotary motion effect based on a principle of a screw and a principle of pressure gradient (Bernoulli) acting the whole surface on an outer periphery of the spiral barrel by rotation, in the spiral barrels of shaft type and vane type spiral barrel propeller mounted on a rotary shaft. COPYRIGHT: (C)2005,JPO&NCIPI
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