| 摘要 |
PCT No. PCT/SE93/00595 Sec. 371 Date Mar. 14, 1995 Sec. 102(e) Date Mar. 14, 1995 PCT Filed Jun. 30, 1993 PCT Pub. No. WO94/01323 PCT Pub. Date Jan. 20, 1994.A pitch stabilized vessel includes at least one displacement hull constructed for high propulsion speeds of, for instance, 35 knots. The hull is configured so as to locate the pitching center of the vessel far forwards on the hull, for instance, at a point corresponding to 75% of the length of the hull from the stern thereof. Generally horizontal and elongated fins extend along the hull and project out from the actual hull in the stern half thereof. The fins extend from the stern-edge of the hull through a distance corresponding to one-third of the length of the hull. The fins have a total horizontally projected surface area which corresponds to at least 5% of W/d, where W is the total underwater volume at construction draft and d is the hull construction draft. The total horizontally projected area of all fins provided on the type of vessel concerned is at least 5% of the total area of the hull at the water line, this hull area being defined as W/d for respective hulls while taking into account the cross-sectional shape of the hull beneath the water line which gives the hull its forwardly-lying pitching center. |
