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Q8. A vessel of 10500 tonne displacement is fitted with a propeller Of 5.5 m diameter

and pitch ratio 0.9.

During a fuel consumption trial of 6 hours duration, a steady shaft speed of 1.8 revs/sec was maintained and 7.54 tonne of fuel was consumed.

The following results were also recorded:

real Slip ratio = 0.34

Taylor wake fraction = 0.32

shaft power = 6050 kW

transmission losses = 3%

quasi-propulsive coefficient (QPC) = 0.71

propeller thrust = 680 kN

Calculate EACH of the following:

(a) the speed of the ship; (4)

(b) the apparent Slip ratio; (1)

(c) the propeller efficiency; (3)

(d) the thrust deduction fraction; (3)

(e) the fuel coefficient; (3)

(f) the specific fuel consumption.  (2)