| 摘要 |
<p>A hybrid sail apparatus composed of a rigid sail 4 having a flat, preferably aerofoil-shaped, cross- section, and a flexible sail 13 connected to the rear portion of the rigid sail. The hybrid sail apparatus has means for freely adjusting the angles of the rigid sail and the flexible sail in accordance with the direction and velocity of the wind. The apparatus may be provided with means including a sat retractable and extractable to and from the front or lateral side of the rigid sail so as to delay the separation of flow of air. Preferably, the rigid sail is constructed to be foldable at its heightwise mid portion to reduce the height of the rigid sail as desired thereby to avoid interference between the rigid sail and shore structures when the ship moves in a harbour, channel or the like. <IMAGE></p> |
