| 摘要 |
PURPOSE:To improve the straight advance performance of a hull while the sea worthiness of the hull is being maintained by spreadingly opening a pair of right and left propeller shafts backward mutually, tilting them to the central line of the hull, and arranging their forward extension lines intersect each other on a perpendicular line that passes through the center of a torpedo type submerged body. CONSTITUTION:The shafts 7 of propellers 4 installed in a pair of right and left in the stern are tilted to the central line of a hull so as to spreadingly open to the rear mutually and the forward extension lines 3 of the propeller shafts 7 intersect each other on a perpendicular line that passes through the center 2 of a torpedo type submerged body 1. As a result, the movement of the hull under the water can be suppressed by the torpedo type submerged body 1 and the sea worthiness of the hull can be improved. In addition, the rightward and leftward components of the thrust of each propeller 4 can be balanced mutually resulting in allowing the straight advance of the hull and the straight advance performance of the hull can be improved.
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