Question

What is the relative airspeed of an aircraft whose airspeed and minimum drag speed are 500m/s and 150m/s?

(a) 3.33

(b) 0.3

(c) 33.33

(d) 0.333

This question was posed to me in an interview for job.

I'm obligated to ask this question of Aerodynamic Relationships in division Aircraft Force Systems and the Equations of Motion of Aircraft Performance

Answer 1

Correct answer is (a) 3.33

Easiest explanation: The answer is 3.33. Given, airspeed is 500m/s and minimum drag speed is 150m/s. From the formula u=\(\frac{V}{V_{md}}\) where V is airspeed and Vmd is minimum drag speed. On substituting the values we get u= \(\frac{500}{150}\)

u=3.33.