The drag divergence Mach number of an airfoil – McqOptions

MCQOPTIONS

1.	The drag divergence Mach number of an airfoil
A.	is a fixed number for a given airfoil
B.	is always higher than the critical Mach number
C.	is equal to the critical Mach number at zero angle of attack
D.	is the Mach number at which a shock wave first appears on the airfoil
Answer» C. is equal to the critical Mach number at zero angle of attack

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