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8. Basic aerodynamics

Induced Drag is

never equal to profile drag.
equal to profile drag at Vmd.
equal to profile drag at stalling angle.

Explanation from PART66Online

Induced drag falls with speed while profile (parasite) drag rises with speed; the total drag curve reaches its minimum where the two are equal. That speed is the minimum-drag speed Vmd, so by definition induced drag equals profile drag at Vmd.

Jordi asked · 26 Jun 2020

Can someone please tell me what is Vmd?

Community Comments (2)

Caterinaiovine 9 May 2024

Vmd is the speed where the rate of sink is the lowest.

Jordi 17 Oct 2024

thank you i managed to pass the subject

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