Question

An A/C is flying with thrust loading at take-off is 0.9. If thrust at take-off and cruse is equal then, determine the thrust loading during cruise.

(a) 0.941

(b) 0.951

(c) 0.961

(d) 0.98

I had been asked this question in homework.

My doubt is from Thrust Weight Ratio-2 in division Thrust-Weight Ratio and Wing Loading of Aircraft Design

Answer 1

The correct option is (a) 0.941

Easy explanation: Given thrust at take-off = thrust at cruise = T

Cruise thrust loading is given by,

(T/W)cruise = (T/W)take-off * (Wtake-off / Wcruise).

For cruise Wcruise = 0.956 * Wtake-off

Hence,

(T/W)cruise = (T/W)take-off * (Wtake-off / 0.956*Wtake-off) = 0.9/0.956 = 0.941.