模型船による逆スパイラル試験法に関する一考察

概要

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As it is not so long since the reversed spiral test has been proposed and adopted as a test method on manoeuvrability, the test-technique itself has not yet been established sufficiently. In order to examine the effect of the steering method upon the test results, the reversed spiral tests were carried out on the models of a mammoth tanker and a high speed container ship. The conclusion are as follows, 1) If the half amplitude of rudder angle is smaller than 5°, no effect of the variations of the rudder angle is recognized. 2) Although the centre angle of steering on the test somewhat differes from the rudder angle corresponding to the set angular velocity, the effect of the difference is negligible. In additon, as the results of the reversed spiral tests on the model of a mammoth tahker, two r-δ curves were obtained for one test condition. Such a unusual phenomenon had never been seen.
独立行政法人海上技術安全研究所の論文
1973-03-31