7. For a single screw vessel design project an engine has been selected and a pre- liminary propulsion analysis resulted

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7 For A Single Screw Vessel Design Project An Engine Has Been Selected And A Pre Liminary Propulsion Analysis Resulted 1 (45.61 KiB) Viewed 15 times

7. For a single screw vessel design project an engine has been selected and a pre- liminary propulsion analysis resulted in the engine and propulsion data below. Estimate the quasi-propulsive efficiency np by means of the data. Assume typical values for data not provided, making especially sure that you do not overestimate quasi-propulsive efficiency. Also state torque, thrust power, effective power, and resistance of the vessel. : Ship and engine data ship design speed Us = 24.0 kn engine brake power PB = 25000.0 kW rate of revolution n = 90 rpm hull efficiency nu = 1.100 propeller open water efficiency no = 0.62 shaft efficiency ns = 0.98