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I am aware that this value of lift coeff. over drag coeff. occurs when the zero lift drag is 3X the drag due to lift, and that this will correspond to a specific airspeed. What is the significance of this value/ this airspeed?

Peter Kämpf
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Caleb G
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1 Answers1

4

Gliders fly at their minimum sink speed when $\frac{c_L^{3/2}}{c_D}$ reaches its maximum.

Propeller airplanes fly at their maximum endurance speed and their best climb speed when $\frac{c_L^{3/2}}{c_D}$ reaches its maximum.

Bianfable
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Peter Kämpf
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