What is endurance function?(a) \(\big[\frac{E_{max}}{C}\big]\)(b) lnω(c) \(\big\{\frac{2u^2}{u^4+1}\big\}\)(d) \(\big\{\frac{2u^2}{u^4+1}\big\}\)lnωI got this question during an online interview.The origin of the question is Cruise Method 1 topic in portion Cruising Performance of Aircraft Performance

What is endurance function?(a) \(\big[\frac{E_{max}}{C}\big]\)(b) lnω

1.	What is endurance function?(a) \(\big[\frac{E_{max}}{C}\big]\)(b) lnω(c) \(\big\{\frac{2u^2}{u^4+1}\big\}\)(d) \(\big\{\frac{2u^2}{u^4+1}\big\}\)lnωI got this question during an online interview.The origin of the question is Cruise Method 1 topic in portion Cruising Performance of Aircraft Performance
Answer» CORRECT answer is (d) \(\big\{\frac{2u^2}{u^4+1}\big\}\)lnω Best explanation: The ENDURANCE factor is given by \(\big\{\frac{2u^2}{u^4+1}\big\}\)lnω where Emax is endurance and C is specific fuel consumption. The endurance equation is given by E=\(\big[\frac{E_{max}}{C}\big]\big\{\frac{2u^2}{u^4+1}\big\}\)lnω where V is true airspeed, C is specific fuel consumption, L is LIFT, D is drag, Emax is endurance, u is relative airspeed and ω is fuel ratio.

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