Stopping abilities of ships equipped with controllable pitch propeller<xref><sup>1</sup></xref>

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Stopping abilities of ships equipped with controllable pitch propeller¹

Part I

Okamoto, H. / Tanaka, A. / Nozawa, K. / Saito, Y.

Recently KHI built three kinds of ships equipped with each one Controllable Pitch Propeller (CPP). They are higher-powered ships in comparison with those built before. Their ship kinds are Reefer, Container and Ore/Oil Tanker. As speed and size of ships increase, necessity of performance for stopping abilities has been promptly raised. Investigations on the stopping abilities of ships with Fixed Pitch Propeller (FPP) have been reported in detail by many researchers, but those on CPP ships are very rare.

As the first step of the investigation on the stopping abilities of ships equipped with CPP, authors report crash astern test results measured at sea trial test of above mentioned ships and compare them with those of FPP ships. Furthermore they show results of computation about transient phenomena in case of CPP ships by using one dimensional equation of motion and compare them with sea trial results.