Trial Results of the Tug-boats Equipped with Voith-Schneider Propellers

Abstract

In this report, the results of speed trial at free running and bollard pull trial of five pusher type tug boats equipped with two Voith-Schneider propellers (V.S.P.), which have been built at Osaka Shipbuilding Co., are described. At trials, shaft horse power, towing force and displacement of pitch indicator of V.S.P. etc. were measured. Furthermore, resistance tests on these ship forms were carried out at the experimental tank of Osaka University. From these results, propulsion factors at speed trial and towing force per 100 SHP at bollard pull trial etc. were analysed using the characteristic curves calculated by Taniguchi's approximate solution of V.S.P.