Question

Which of the following is disadvantage of fixed engine sizing?

(a) Often requires compromise in mission range or performance

(b) Less costly compared to rubber engine

(c) Availability is more than rubber engine

(d) Has no disadvantage

I have been asked this question in an interview for internship.

My doubt stems from Fixed-Engine Sizing topic in portion Initial Sizing of Aircraft Design

Answer 1

Right choice is (a) Often requires compromise in mission range or performance

For explanation: In general, for any reason if our weight needs to be alter during sizing then we need to provide optimization for such changes. In most of cases we need to alter the range or any other mission parameters.