ウインドラスのブレーキ力について

概要

論文の詳細を見る
Some captains and pilots handling gigantic ships have some questions about the braking capacity of a windlass and say that they are very sensitive to letting go anchor with any ship's speed. The author analyzed theoretically on the braking capacity of a windlass to clear up these questions as to the following two cases. 1) the capacity of brake holding the falling anchor and cable in the water. 2) the capacity holding the tension of chain cable acting on a windlass when a ship, having some initial speed at the time letting go anchor, has made stopped by the operation of a brake. The results of the analysis and calculations are as follows: 1) The capacity of brake provided for the Japanese Industrial Standard (20% of the proof load of chain cable) is sufficient on both cases analyzed and we are able to handle a windlass of gigantic ship as same as on a conventional ship. 2) The pulling velocity of brake band affects the length of running out chain cable while the operation of holding anchor, falling down in the water, and it is necessary to have the pulling velocity of the brake band about 30 tons per second in the case of 200, 000 D.W.T. tanker. So it must be considered about the pulling velocity of brake band on the design stage of a windlass.
社団法人日本航海学会の論文
1976-08-20