Question

Consider a glider is descending from 2km altitude. If it covers range of 30km then, at which aerodynamic efficiency the glider was flying?

(a) 15

(b) 60

(c) 12

(d) 21

This question was posed to me in quiz.

This interesting question is from Flight Mechanics in section Performance and Flight Mechanics of Aircraft Design

Answer 1

Correct answer is (a) 15

The explanation is: Aerodynamic efficiency = range/altitude = 30/2 = 15.