| 摘要 |
The blades of a lift type vertical shaft type windmill are improved to make it possible to efficiently rotate the windmill even at start or in low-speed wind areas, so as to provide a highly efficient windmill for wind power generation. A windmill for wind power generation, wherein in planes orthogonal to a vertical rotary shaft, a plurality of blades are parallelly provided on the rotary shaft at given angular intervals with the center at the rotary shaft. In this windmill, the blades are of airfoil shape having a low Raynolds number and a high lift coefficient and are formed with a notch in the rear edge of the lower surface of the airfoil.
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