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Minimum range is given when the aircraft is fly’s at u=1.316.(a) True(b) FalseThis question was addressed to me during an online exam.My query is from Cruise Method 1 in chapter Cruising Performance of Aircraft Performance

Answer»

The CORRECT option is (b) False

The BEST EXPLANATION: Maximum range is given when the aircraft is fly’s at u=1.316. 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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