Hello all,
Here is a question from which i don't understand the answer.
On a twin engined piston aircraft with variable pitch propellers, for a given mass and altitude, the minimum drag speed is 125 kt and the holding speed (minimum fuel burn per hour) is 95 kt.
The best rate of climb speed will be obtained for a speed :
a) inferior to 95 kt
b) equal to 95 kt
c) is bteween 95 and 125 kt
d) equal to 125 kt
Good answer is B.
They say that the minimum drag speed Vmd is 125 kts. Now, we know that for propeller aeroplane Vmd is the best rate of climb speed (and the best range one as well). So logically in this question the right answer for the question "what is the best rate of climb speed" should be 125kt, isn't it? Why is it not the case? Could someone explain me why 95 kt (which is the holding speed) is the best rate of climb speed for this aeroplane?
Many thanks.
