Critical Mach number Critical Mach number In aerodynamics, the critical Mach number (Mcr or M* ) of an aircraft is the lowest Mach number at which the airflow over some point of the aircraft reaches the speed of sound, but does not exceed it. At the lower critical Mach number, airflow around the entire aircraft is subsonic. At the upper critical Mach number, airflow around the entire aircraft is supersonic. For an aircraft in flight, the speed of the airflow around the aircraft differs considerably in places from the airspeed of the aircraft; this is due to the airflow having to speed up
Mach Loop Typhoon, Hawk jets and C-130J and Short Tucanoas well as U.S. Air Force F-15C Eagles, F-15E Strike Eagles, which are based at RAF Lakenheath in eastern England and MC-130 and V-22 Osprey from RAF Mildenhall. Many flight simulators have replicated the Mach Loop in Wales, but a notable one is present in the FlightGear flight simulator, created by the FGUK community as an add-on for the simulator, providing the player with the challenge of guiding aircraft at high speed through rings that mark the route. In addition, the scenario has "start" and "finish" points, and each run in the Mach