A ship 120m long displaces 10500 tonne and has a wetted surface area of 3000m2 . At 15 knots the shaft power is 4100KW, propulsive coefficient 0.6 and 55% of the thrust is available to overcome frictional resistance; calculate the shaft power required for a similar ship 140m long at the corresponding speed. ∫ = 0.42 and n = 1.825
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