Question

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

(a) VemP=\(\sqrt[3]{\frac{ZW^2}{3Y}}\)

(b) VemP=\(\sqrt[4]{\frac{ZW^2}{Y}}\)

(c) VemP=\(\sqrt[4]{\frac{ZW^2}{3Y}}\)

(d) VemP=\(\sqrt[4]{\frac{ZW}{3Y}}\)

The question was posed to me in a national level competition.

I need to ask this question from Minimum Power Speed in division Aircraft Force Systems and the Equations of Motion of Aircraft Performance

Answer 1

Correct choice is (c) VemP=\(\sqrt[4]{\frac{ZW^2}{3Y}}\)

To explain I would say: The correct relation between EAS and minimum power speed is VemP=\(\sqrt[4]{\frac{ZW^2}{3Y}}\) where Y is a constant, VemP is minimum power speed, W is weight, Z is constant. The true air speed have to be converted into equivalent airspeed before multiplication to derive the drag power equation.