Pages 23-34
Experimental study on the hull form at speed of Fn=0.35-0.45, for improving the high speed ability with added singularities on midship part is described in the presented thesis. There are two indispensable items for reducing the hull resistance under the influence of added singularities. 1. uniformity of pressure distribution on the hull surface. 2. reciprocal interference among bow waves midship waves and stern waves. The authors introduced above two indispenbable items into the designing new type hull form, so-calledHybrid・mark 2 Catamran Stern based on the simulant calculations, and clarified the design problems involved owning to the results of experiment. As a result, the valuable effects for reducing the hull resistance have been proved. It was confirmed that this new type hull form is expected the speed up of 1.5 knots with same output, or the fuel saving of 30% with same displacement and same service speed, as compared with ordinary hull form.
