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Power loading of prop driven aircraft is ______

(a) greater or equal to one

(b) same as lift of propeller

(c) always be zero

(d) equal to drag always

I got this question in my homework.

Question is taken from Thrust Weight Ratio-1 in section Thrust-Weight Ratio and Wing Loading of Aircraft Design

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Correct option is (a) greater or equal to one

For explanation: Power loading for propeller driven aircraft is an important parameter representing the relation between power and weight. Power loading will always be greater than one and in much idle case it will be one. It cannot be zero. Lift and drag are forces.

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