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Home > Exam Questions > ATPL - Airline Transport Pilot Licence > Principles of Flight > Critical Mach number is the free stream Mach number at which:

221 - ATPL Question Bank in English - Critical Mach number is the free stream Mach number at which:

Question 221 - Principles of Flight - ATPL - Airline Transport Pilot Licence

There is subsonic flow over all parts of the aeroplane.

The local airflow first reaches Mach 1.0 on any part of the aeroplane

The aeroplane has zero buffet margin.

There is supersonic flow over all parts of the aeroplane.

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