Critical Match number
The flight match number at which there is the first indication of air flowing over any part of the structure at a speed of Mach one, the local speed of sound.
Aviation Maintenance Technician Handbook — Powerplant, p. G-8
The flight match number at which there is the first indication of air flowing over any part of the structure at a speed of Mach one, the local speed of sound.
Aviation Maintenance Technician Handbook — Powerplant, p. G-8