Critical Mach, or the Critical Mach Number or simply ‘Mach Critical’ is the most important aerodynamic parameter in aviation. The critical mach defines the speed at which an aircraft’s airflow on certain parts of its wings first reaches the speed of sound, leading to a series of transonic flight conditions. When an aircraft exceeds its defined critical mach number, it can undergo several aerodynamic challenges and is thus highly considered in aircraft design and operation.

BY Best Interview Question ON 11 Oct 2023