Question

Relative airspeed acts as a shaping factor.

(a) True

(b) False

This question was addressed to me by my college director while I was bunking the class.

This is a very interesting question from Cruise Method 1 topic in section Cruising Performance of Aircraft Performance

Answer 1

Right choice is (a) True

For explanation I would say: Relative airspeed acts as a shaping factor. Relative airspeed is given by \(\Big\{\frac{2u^3}{u^4+1}\Big\}\) where u is relative airspeed. 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.