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 Five his crew, and with other racers. Functions are not activated by a steering wheel hub lettered A-G, but instead, by switches mounted around the steering wheel. The Mach 6 succeeded the Mach 5 as the main vehicle for the rest of the series. More of the original gadgets were gradually revealed (such as the sludge slick) and used in future episodes. Eventually, the Mach 5 returned as Speed Racer Sr.'s main car in the season 2 premiere. Mach Five The is the racing car Speed Racer (Go Mifune in the Japanese version) drives in the anime series of the same