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Q11. A ship of length 160 m and breadth 28 m floats at a draught of 12 m in sea waler of density 1025 kg/m² with a block coefficient of 0.7.

Allowance for appendages = 6%

Allowance for weather = 14%

Quas-propulsive coefficient (QPC) = 0.71

A geometrically similar model 8 m in length, when tested at a speed of 1.6 m/s in fresh water of density 1000 kg/m³ gives a total resistance of 82 N. Calculate the service delivered power for the ship at the corresponding speed to that of the model;

Note: The frictional coefficient for the model in fresh water is 1.69

The frictional coefficient for the ship in sea water is 1.42

Speed is in m/s with index (n) = 1.825

Wetted surface area (m) = 2.6 √A X L