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Q7.  A ship model of length 5 m has a wetted surface area of 4.6 m².  When tested in fresh water of density 1000 kg/m³, at a speed of 1.75 m/s, the total resistance was measured at 35 N. This tank speed corresponds with a trial ship seed of 17 knots in sea water of density 1025 kg/m³, which is achieved when the shaft power is 6000 kW, when the propulsive coefficient is 0.68.

Calculate the Ship Correlation Factor (SCF) for the ship in this trial condition. (16)

Note: The frictional coefficient for the model is fresh water is 1.694

The frictional coefficient for the ship in sea water is 1.419

Speed in m/s with the speed index (n) for ship and model 1.825