| 摘要 |
<p>The Prefab Variable Surface Sail consists of the sail axle (4) seated in the hollow shafts (5) and (21). On the top of the sail is the upper sail slide (6) and on the bottom the lower sail slide (11). The sail axle (4) is inserted into a wider tube which serves as the sail folder (8) and on which the sailcloth (7) is wound. The sail is spread by means of the sail spars (9) running along the upper (6) and lower (11) sail slide. On the sail sides (10) are three pulleys (14) over which the spreading (16) and tightening (17) ropes are running. The sails are spread and contracted by the electric motor (19) which winds and unwinds the sailcloth (7) by rotating the sail folder (8). The electric motor (19) is controlled by an addressable control unit on the windmill base operating upon data received from the wind speed sensor and the sail spread sensors (18). The sails are transported in parts to the site and assembled on the windmill. They are replaceable in case of defect.</p> |
