| 摘要 |
<p>The movable keel is for a sailing boat with a monocoque hull, and is concave on the inboard side, matching the shape of the hull. The keel can be used in the wind, and the thrust generated can have a component directed vertically downwards. Accommodation for ballast can be provided in it, and it can be arranged to curve about a single axis. It can be arranged to move with the wind and lower its centre of gravity in the working position in relation to the vessel centre line.</p> |
