A Practical Method of Analysing the Acceleration and Deceleration of Ships

Abstract

A practical method of analysing the acceleration and deceleration of ships is presented with special reference to large vessels. The motion of ship is described in terms of the advance-coefficient of the propeller which gives the rate at which the propeller advances through the water during its unit revolution per second. The use of time constant T is recommended as a reasonable measure of acceleration and deceleration of ships both in a practical and theoretical point of view. In consideration of lack of the published data, the results of some trial calculations are presented.