Exam Question

The following data applies to a ship operating on a particular voyage with a propeller of 6m diameter having a pitch ratio of 0.95.

Propeller speed = 1.8rev/sec

Real slip = 34%

Apparent slip = 7%

shaft power = 10000 kw

Specitic fuel consumption = 0.22 kg/kw hr

Caculate each of the tollowin:

(a) The ship speed in knots (3)

(b) The Taylor wake fraction (4)

(c) The reduced speed at which the ship should travel in order to halve the voyage consumption (2)

(d) The voyage consumption if the vovage takes 3 days longer at the reduced speed (4)

(e) The amount of fuel required for the voyage at the reduced speed (3)