Repeated Self Propulsion Test on a Tanker Model

Abstract

In Mitsubishi Experimental Tank (Nagasaki), investigations have been made into the repeatability of self-propulsion tests on full ship forms by repeating the resistance tests, the self-propulsion tests and the propeller open-water tests for a 7m wooden model of a typical tanker.The self-propulsion factors deduced properly from the self-propulsion tests are scarcely affected by water temperature, and the standard deviations of the self-propulsion factors from their mean values are about 0.006 for er, about 0.005 for wm and about 0.01 for t, and the estimated standard deviation of SHP of the actual ship due to the dispersion of the self-populsion factors is about 1.5%.