小型漁船に於ける仮舵用放流ロープの効きに就て-1-

概要

論文の詳細を見る
The effect of trail rope was studied by the resistance and yawing experiments. A model of a tuna long liner of gross tonnage about 260 tons was used. Figures 1 and 2 show the plans of the experiments. When a boat makes head at a higher speed than 3 knots relative to the surface water, the effect on the course stability of the trail rope as a Jury rudder is very marked, while less so at a higher speed than 5 knots. In the case where the speed was 4.4 knots, the boat without trail rope showed a critical yawing angle 12°. The angle increased to 15° with rope of straight line type and to 24° with rope of U-line type. The boat with trail rope, especially of U-type, shows a faster damping period of yawing (Fig. 4a and 4b). This type of a Jury rudder seems to be very useful in the case of strong gale.
鹿児島大学,カゴシマダイガク,Kagoshima Universityの論文