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What is the relation between the drag divergence Mach number and critical Mach number?

What is the relation between the drag divergence Mach number and critical Mach number? Correct Answer Mdrag – divergence > Mcrit

Drag – divergence Mach number is greater than critical Mach number. At this Mach speed, there is a region of local supersonic flow followed by a shock wave. This results in pressure drag eventually causing boundary layer separation.

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