Exam Question

A ship of 15000 tonne displacement has an Admiraly Co-efficient, based on shaft power, of 420. The mechanical efficiency of the machinery is 83%, shaft losses 6%, propeller efficiency 65% and QPC 0.71. At a particular speed the thrust power is 2550kW.

(a) Indicated power (6)

(b) Effective power (6)

(c) Ship speed (4)