旋回圏の算定式について : 第3報 実船に対する実用算定式(日本航海学会第21回講演会)

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書誌事項

タイトル別名
  • On the Calculating Formulae for the Turning Circle of Ship : Part 3. Practical Formulae of the Circle for Actual Single Screwed Vessels
  • 旋回圏の算定式について-3-
  • センカイケン ノ サンテイシキ ニ ツイテ 3

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抄録

Following formulae for calculating the Transfer D_T and Advance D_A, in no dimensional form, were obtained by discussing the results of turning trials of many fishing boats and some cargo vessels. [numerical formula] In above equations the coefficients m', k, n' are shown by functions of practical turning factors as follows. i) Angular velocity in turning [numerical formula] ii) Ratio of final speed and initial speed [numerical formula] iii) Speed decreasing coeff. of exp. function [numerical formula] where W: Displacement in Kt. L: Ship's length between p.p. in m. B: Ship's breadth in m. d: mean draft in m. t : trim in m. C_b: Block coeff. or [numerical formula] A: Rudder area under W.L. in m^2. α: Actual rudder angle at rudder head in degree. t_0': t_0/√<L> t_0: Putting time of the helm angle in sec.

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