An apparatus converting wind force into mechanical energy and the application for the same are disclosed. The apparatus converting wind force into mechanical energy includes at least a controllable flat or curved blade (L1 to L8), the area of which is adjustable, and the blade can rotate around a common shaft (C), and is controllable to adjust its direction. Advantageously, said blade is a airfoil-shaped blade and consists of a plurality of components, one of which is a shaft, the axis of which is parallel to the shaft(C).
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