後進旋回中の船の転心について-II : 模型実験

概要

論文の詳細を見る
One of the authors, H. Kugumiya, has continued to study the movement of a ship when she goes astern, especially the behavior of the pivot-point. He published a report of the results of ship's ex periments in 1974. In that report, he states as follows: (1) when a ship goes astern and turns, the pivot-point appears at the sternpart of a ship, and (2) the point is not fixed, but seems to move longitudinally with certain periods. We tried, this time, to find out the pivot-point, by making a model ship go astern. The experiments were held at the water pond of the University of Mercantile Marine, Tokyo in Aug. 1974. The model used is made of wood, and 1.85 meter of length. The data about the relative yaw angle, propeller R.P.M. and the angle of the rudder were sent to the shore by FM-FM telemeter system. The results are as follows: (1) the pivot-point exists at the sternpart of the model, and (2) it appears mostly between 0.3〜0.6 Lpp sternward from midship. These results agree fairly well with the results in the report of the prototype experiments above mentioned.
社団法人日本航海学会の論文
1976-01-20