| 摘要 |
Wing sail including a rotating mast vertically mounted on a wind-propelled vehicle, three sail panels defining its skin. Spreaders extend transversely of the mast, imparting to them an airfoil shape with leading and trailing edges fore and aft of the mast. Two vertical tracks secured to both sides of the mast top and the outer ends of each spreader. Sliders secured to the sail panels, slidable in the tracks, permitting hoisting and reefing the sail panels along the tracks. A boom pivotally coupled to the mast and a ram secured to the lower spreader and to the boom, the leading and trailing edges defining one wing sail unit, trimming the airfoil shape. An outhaul line pulls clews of both trailing edges together through a block, evening tension rearwardly of the trailing edge clews and permitting the clews to slide along the boom when the airfoil shape is changed. |
