| 摘要 |
PROBLEM TO BE SOLVED: To provide a windmill superior in efficiency and startability, by optimizing a wind receiving part. SOLUTION: In this windmill 1, a Savonius type blade 4 having a wind receiving surface 2 and a back face 3 in a cross section of the windmill 1, is arranged by two sheets, and a wing type blade 5 is arranged by two sheets between these, and is arranged by four sheets in total in the same diameter. The blade 4 and the blade 5 extend in the axial direction, and is formed as a structure installed on a central support plate 7 in the center and a central shaft 8. In starting when a wind speed is small, the startability is improved since the Savonius type blade 4 operates, and the propeller type blade 5 operates in high output when the wind speed is much, and force converted into torque from wind increases, and generating torque in the same wind speed can be increased, and the efficiency of the windmill can be improved. COPYRIGHT: (C)2007,JPO&INPIT
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