| 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 Bach type blade 4 having a wind receiving surface 2 and a back face 3 in a cross section of the windmill 1, is arranged in two sheets, and a wing type blade 5 is arranged by two sheets between these, and is arranged by four sheets in the same diameter. The Bach type blade 4 and the wing type 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 Bach type blade 4 operates, and the wing type blade 5 operates in high output when the wind speed is much. Force converted into torque from wind is increased, and generating torque in the wind speed can be increased, and the efficiency of the windmill can be improved. COPYRIGHT: (C)2007,JPO&INPIT
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