Question

What will be the specific endurance of an aircraft having fuel mass flow 0.75 kg/s?

(a) 4.33 s/kg

(b) 3.33 s/kg

(c) 1.33 s/kg

(d) 2.33 s/kg

This question was posed to me by my college professor while I was bunking the class.

Enquiry is from Cruising Performance in section Cruising Performance of Aircraft Performance

Answer 1

Correct choice is (c) 1.33 s/kg

Explanation: The answer is 1.33. Given Qf=0.75 kg/s. The specific endurance is given by SE=\(\frac{1}{Q_f}\)

On substituting we get SE=\(\frac{1}{0.75}\)

SE=1.33s/kg.