Question

Which of the following is incorrect?

(a) Operating envelope will give same values for all the aircraft

(b) Load factor at cruise is unity

(c) Lift is same as weight during cruise

(d) Wing loading is not same as thrust

I got this question by my college director while I was bunking the class.

I'm obligated to ask this question of Flight Mechanics topic in division Performance and Flight Mechanics of Aircraft Design

Answer 1

Correct option is (a) Operating envelope will give same values for all the aircraft

For explanation: Load factor is defined as ratio of lift to weight. At cruise lift and weight both are equal. Hence, at cruise load factor is unity. Wing loading and Thrust are two different things. Wing loading is ratio of weight by reference area.