Question

The endurance of cruise method 3 is identical to that of cruise method 1.

(a) True

(b) False

The question was posed to me in an online interview.

Enquiry is from Cruise Method 3 topic in portion Cruising Performance of Aircraft Performance

Answer 1

Right answer is (b) False

The best I can explain: The endurance of cruise method 3 is not identical to that of cruise method 1. E=\(\Big[\frac{E_{max}}{C}\Big]2\Big\{tan^{-1}\Big[\frac{1}{u_{i}^2}\Big]-tan^{-1}\Big[\frac{1}{\omega u_{i}^2}\Big]\Big\}\)where where V is true airspeed, C is specific fuel consumption, Emax is endurance, u is relative airspeed and ω is fuel ratio.