低速時における船体運動特性に関する研究 －日本丸（FPP 2軸1舵船）によるその場回頭について－

抄録

 In general, twin-screw vessel is able to do pinwheeling by reversing main engine each other. According to the model experiment result of preconstruction, NIPPON MARU also can turn short radius by reversing main engine each other. However, the method had not been verified through full-scale experimental test. According to this test, NIPPON MARU is able to turn in short radius by using propeller reversing each other. And in this case, it needs that astern thrust is bigger than forward thrust. (For example: one engine is slow ahead, another one is half astern engine. ) And rudder angle has no effect on the turning rdius.