| 摘要 |
<p>A wind turbine has two pairs of upper and lower pulleys and two endless support elements that are each looped over a respective one of the pairs of pulleys. The upper and lower pulleys are adapted to rotate each about a respective axis. Both axes are parallel to each other and the wind turbine has a plurality of airfoils that are attached to the endless support elements. The upper pulleys may be of a different diameter than the lower pulleys in order to affect the angle of attack of the air-foils and the turbine may be rotatably mounted on a post so that it may be urged to face incoming wind.</p> |
