Principles of Flightmedium#525
The critical Mach number (Mcrit) is the:
A
Free-stream Mach number at which airflow first reaches Mach 1.0 somewhere on the aircraft
CorrectB
Maximum operating Mach number
C
Speed of sound at sea level
D
Mach number for best range
Explanation
Mcrit is the flight Mach number at which the local airflow first accelerates to sonic speed (M=1.0) at some point on the airframe.
Ready for a timed quiz?
Test yourself with random questions from Principles of Flight and all other ATPL subjects.
Start a Practice Quiz