Exam Question

With respect to ship propulsion:

(a) Explain the various effeciencies associated with propeller and shafting arrangement

(b) When a propeller of 4.8m pitch turns at 110 rpm, the apparent ship is found to be -S% and the real slip is 1.5 S%. If the wake speed is 25% of the ship speed, calculate the ship speed, apparent slip and real slip.