compressibility drag rise Mach number

compressibility drag rise Mach number (Mcdr)

compressibility drag rise Mach number (Mcdr)click for a larger image
Drag coefficient behavior at high showing critical mach number and compressibility drag mach number.
That Mach number (beyond critical Mach number) in which the coefficient of drag increases by 0.005. It is the limit of the normal economic operation of the aircraft.