パラシュート形シーアンカーについての一考察(日本航海学会第36回講演会)

概要

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This paper deals with the results of experiments toward the sea anchor of parachute type, which was improved from parachute. During drifting with a sea anchor of parachute type, the horizontal movements of relative ship's head bearing was sinuous to the wind direction and the towing rope with a period of about 10 minutes or so. The vertical movement was measured by recording depth meters. The observations were carried out chiefly in regard to the maximum depth, the floating periods, towing tension, and arrangement of weights on various speed. The results showed that the tension related to the nearly square of speed. Generally, the longer towing rope has a tendency to decrease the horizontal movements, dip of horizon and unexpected tension. The bouy rope which length is 20〜50 meters was demanded in order not to sink the sea anchor of parachute type.
社団法人日本航海学会の論文
1967-07-25