Critical Mach number is the free stream Mach number at which:

Question

Question ATPL - Airline Transport Pilot license - Principles of Flight

QuizVDS · Accepted Answer

Local supersonic flow first exists on any part of the aeroplane.

QuizVDS · Answer

There is subsonic flow over all parts of the aeroplane.

QuizVDS · Answer

The aeroplane has zero buffet margin.

QuizVDS · Answer

There is supersonic flow over all parts of the aeroplane.

Id 221 - ATPL - Critical Mach number is the free stream Mach number at which: