後進推力に重点を置いた引船船型の研究

概要

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The bollard pull tests of tug boat models with nozzle propellers are carried out, to study the possibility to increase the astern thrust. A buttock flow form (B-type ship) and a normal tug boat form (N-type ship) are compared. The experimental results are as follows: 1) At M.C.R., thrusts of the B-type ship are about 4.2% (for the ahead) and 4.0% (for the astern) larger than the N-type ship. 2) The effects of the inclinations of the nozzle centre line to horizontal plane and vertical plane are not significant.
1967-09-30