Which of the following represents range function?(a) \(\Big[\frac{V_{mdi}}{C}E_{max}\Big]\)lnω(b) \(\Big[\frac{V_{max}}{C}E_{max}\Big]\)lnω(c) \(\Big\{\frac{2u^3}{u^4+1}\Big\}\)lnω(d) \(\Big\{\frac{2u^4}{u^4+1}\Big\}\)lnωI got this question in final exam.I need to ask this question from Cruise Method 1 topic in chapter Cruising Performance of Aircraft Performance

Which of the following represents range function?(a) \(\Big[\frac{V_{m

1.	Which of the following represents range function?(a) \(\Big[\frac{V_{mdi}}{C}E_{max}\Big]\)lnω(b) \(\Big[\frac{V_{max}}{C}E_{max}\Big]\)lnω(c) \(\Big\{\frac{2u^3}{u^4+1}\Big\}\)lnω(d) \(\Big\{\frac{2u^4}{u^4+1}\Big\}\)lnωI got this question in final exam.I need to ask this question from Cruise Method 1 topic in chapter Cruising Performance of Aircraft Performance
Answer» The correct option is (c) \(\Big\{\frac{2u^3}{u^4+1}\Big\}\)lnω For explanation I would say: The RANGE FUNCTION is given by \(\Big\{\frac{2u^3}{u^4+1}\Big\}\)lnω. The range EQUATION in cruise METHOD 1 is given by R1=\(\Big[\frac{V_{mdi}}{C}E_{max}\Big]\Big\{\frac{2u^3}{u^4+1}\Big\}\)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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