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Q8. A ship 160 m long and 28 m breadth displaces 32600 tonne when floating at a draught of 10 m in sea water of density 1025 kg/m2

The propeller has a diameter of 6.0 m and a pitch ratio of 0.9.

With the propeller operating at 1.8 revs/sec, the following results were recorded:

propeller thrust = 1500 kN

real ship = 36%

propeller efficiency = 65%

transmission losses = 3%

fuel consumption per day = 68 tonne

Calculate EACH of the following.

(a) the ship speed. (6)

(b) the apparent slip; (2)

(c) the specific fuel consumption; (4)

(d) the mass of fuel required to travel 4000 nautical miles at a constant speed of 18 knots including a reserve of 10%. (4)

Note: Wake fraction = 0.5 Cb - 0.05