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In cruise performance the fuel mass flow determines the rate of change of mass of the aircraft.(a) True(b) FalseI had been asked this question in a national level competition.This interesting question is from Cruising Performance in chapter Cruising Performance of Aircraft Performance

Answer» RIGHT option is (a) True

For explanation I would say: In cruise performance the fuel mass flow determines the RATE of change of mass of the AIRCRAFT. It is EXPRESSED by the formula Qf=\(\frac{-dm}{DT}\) where dm is mass rate and dt is time rate. The fuel mass is always negative as mass of the aircraft always decreases.


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