漁船の簡易速力算定式

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On basis of the trials of the fishing boats, I set up a simplified equation for the speed of the fishing boat. In this paper, I assume that the horsepower of the fishing boat is in proportion to the weight of the boat and the 4th power of the speed. These relations become as follows: BHP=α_4・W・V^4 Where BHP is horsepower (in ps) and W is weight (in tons) and V is speed (in knots) and α_4 is resistance coefficient (included propulsion coefficient). Therefore, V becomes as follows: V=√^4<(BHP)/(α_4・W)> The simplified equation is obtained by analyzing α_4 and ship's length (register length) on basis of speed trials of the fishing boats. The simplified equation is as follows: V=√^4<(BHP・L^2)/(0.173・W)> Where L is register length (in m). The above equation is applicable to the range of 0.22<Froude's number<0.4 and 20m≦L≧110m.
公益社団法人日本航海学会の論文
1987-03-25