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An aircraft has lift to drag ratio during cruise as 2.5 and load factor as 1.2. Which value of thrust loading should be selected?(a) 0.48(b) 0.58(c) 0.38(d) 0.28The question was asked in final exam.This is a very interesting question from Selection of Thrust-Weight and Wing Loading topic in portion Thrust-Weight Ratio and Wing Loading of Aircraft Design

Answer»

Right ANSWER is (a) 0.48

To explain: Given, LOAD factor n=1.2, lift to drag L/D = 2.5

Now, n at CRUISE is given by, n = (T/W)*(L/D).

Hence, T/w is given as,

T/W = n / (L/D) = 1.2/2.5 = 0.48.



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