Question

Which of the following is correct relation between EAS and drag power?

(a) P\(\sqrt{\sigma}\)=YVe^3+\(\frac{ZW^2}{V_e}\)

(b) P\(\sqrt{\sigma}\)=YVe^3–\(\frac{ZW^2}{V_e}\)

(c) P\(\sqrt{\sigma}\)=YVe^2-+\(\frac{ZW^2}{V_e}\)

(d) P\(\sqrt{\sigma}\)=YVe^2–\(\frac{ZW^2}{V_e}\)

This question was posed to me in quiz.

The above asked question is from Minimum Power Speed topic in division Aircraft Force Systems and the Equations of Motion of Aircraft Performance

Answer 1

Correct choice is (a) P\(\sqrt{\sigma}\)=YVe^3+\(\frac{ZW^2}{V_e}\)

The explanation is: The correct relation between EAS and drag power is P\(\sqrt{\sigma}\)=YVe^3+\(\frac{ZW^2}{V_e}\) where Y is a constant, Ve is velocity, W is weight, Z is constant and D is total drag and P is power.