Abstract

Our working group have studied on ships' drift when their engines were stopped. Though a ship's drift on the ocean is affected by the force of the wind on the upper structure of the ship and her rolling caused by swelling waves, we can not separate them. In order to pick out the drifting by wind action, we carried out the wind tunnel experiments with an image model of the above and under-water portions of the Oshoro Maru, a fishing training ship of Hokkaido University. Consequently, we obtained the distance, and direction of the drift due to wind action, and furthermore discussed about the effect of the rolling caused by swelling waves by comparison with the data of the actual drifting on the ocean.

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