Question

Which of the following is the correct climb gradient equation?

(a) τ-\(\frac{1}{2}\)[u^2+u^-2]=Emaxsinγ2

(b) τ+\(\frac{1}{2}\)[u^2+u^-2]=Emaxsinγ2

(c) τ+\(\frac{1}{2}\)[u^2+u^-2]=Emax

(d) τ-\(\frac{1}{2}\)[u^2+u^-2]=Emax

I got this question in a national level competition.

This intriguing question originated from Climb and Descent Performance with Thrust-Producing Engines topic in section Climb and Descent Performance of Aircraft Performance

Answer 1

The correct choice is (a) τ-\(\frac{1}{2}\)[u^2+u^-2]=Emaxsinγ2

The explanation is: The correct climb gradient equation is given by the equation τ-\(\frac{1}{2}\)[u^2+u^-2]=Emaxsinγ2 where τ is dimensionless thrust, u is airspeed, Emax is endurance and γ is the angle at which the force is acting on the aircraft.