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The propulsive force developed by the engine-propeller combination is given by _______(a) \(\frac{\eta V}{P}\)(b) \(\frac{\eta P}{V}\)(c) \(\frac{P}{V}\)(d) \(\frac{VP}{\eta}\)The question was posed to me in an international level competition.This key question is from Climb and Descent Performance with Power-Producing Engines in section Climb and Descent Performance of Aircraft Performance |
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Answer» CORRECT choice is (B) \(\frac{\eta P}{V}\) EASY explanation: The propulsive force developed by the engine-propeller combination is given by \(\frac{\eta P}{V}\) where η is propeller efficiency, P is power and V is VELOCITY. The EQUATION of power-producing engine is written as \(\frac{\eta P}{V}\)-D=Wsinγ2. |
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