CPP1軸1舵船の停止性能について : 実船実験によるFPPとの比較

概要

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A full-scale experiment has been performed to compare each stopping ability of both a ship with a controllable pitch propeller (CPP) and one with a fixed pitch propeller (FPP). The test ship is 5, 884 G.T. with a single CPP and has a direct reversing system for her diesel engine as well. Stopping tests were carried out for various J_<s0>(=U_0/(n・P)) in both the CPP and FPP operation modes. As a result, in the range of the maneuvering speed, stopping time and distance in the CPP mode have mostly shown shorter than those in the FPP mode, so that a CPP is superior to a FPP in its stopping ability. In the meantime, in case of the test ship on reverse maneuver, her turning motion in the CPP mode proved less stable than that in the FPP mode and the degree of the motion increased in proportion to |J_<s0>|. During on stopping maneuver of a single CPP ship in harbor, it is therefore recommended, in order to reduce her turning motion, to proceed with minimum ahead pitch and to apply a little higher reversing pitch than in the case of a FPP ship operation.
社団法人日本航海学会の論文
1999-09-25