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Q7. A. Describe how thrust power is determined. B. The following information relates to a model propeller of 400mm pitch.
Rev/Min | 400 | 450 | 500 | 550 | 600 |
Thrust N | 175 | 260 | 365 | 480 | 610 |
Torque Nm | 16.8 | 22.4 | 28.2 | 34.3 | 40.5 |
i. Plot curves of thrust and torque against rev/min; ii. When the speed of advance of the model is 150m/min and slip 0.20, calculate the efficiency?
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