Question

Which of the following does range factor consists?

(a) Air density

(b) Cruise weight

(c) Temperature

(d) Cruise weight and air density

The question was asked in quiz.

This intriguing question originated from Cruise Method 1 topic in division Cruising Performance of Aircraft Performance

Answer 1

Correct choice is (d) Cruise weight and air density

For explanation: Range factor consists of cruise weight and air density. Range factor in cruise method 1 is given by \(\left[\frac{V_{mdi}}{C} E_{max}\right]\). The range equation in cruise method 1 is given by R1=\(\left[\frac{V_{mdi}}{C} E_{max}\right]\Big\{\frac{2u^3}{u^4+1}\Big\}\) ln ω 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.