Critical Mach number and slow down as it travels around the aircraft's structure. When the aircraft's airspeed reaches the critical Mach number, the speed of the airflow in some areas near the airframe reaches the speed of sound, even though the aircraft itself has an airspeed lower than Mach 1.0. This creates a weak shock wave. As the aircraft exceeds the critical Mach number, its drag coefficient increases suddenly, causing dramatically increased drag, and, in an aircraft not designed for transonic or supersonic speeds, changes to the airflow over the flight control surfaces lead to deterioration in control of the aircraft. In aircraft
Mach Five 345 horsepower, and cost between $75,000 and $125,000 each. The Petersen Automotive Museum in Los Angeles, California has a mid-engine prototype of the Mach Fives in its collection. The Mach Five appears in the live-action film adaptation "Speed Racer", directed by the Wachowski brothers, produced by Joel Silver, and released by Warner Bros. Pictures. The Mach Five is an actual vehicle and used in the major race of the film. Instead of being driven on pavement, it was hung from a crane and had its effects computer-generated. Along with the Mach Five, the movie features the "Mach 4" and the