Mach number a small area around the object's leading edge. (Fig.1b) Fig. 1. "Mach number in transonic airflow around an airfoil; M < 1 (a) and M > 1 (b)." When an aircraft exceeds Mach 1 (i.e. the sound barrier), a large pressure difference is created just in front of the aircraft. This abrupt pressure difference, called a shock wave, spreads backward and outward from the aircraft in a cone shape (a so-called Mach cone). It is this shock wave that causes the sonic boom heard as a fast moving aircraft travels overhead. A person inside the aircraft will not hear this.
Ford Mustang Mach 1 If released, it will be powered by a tuned version of the 5.0-liter Coyote V8 engine, and is likely to slot between the regular Mustang GT and the more powerful Shelby GT500. Ford Mustang Mach 1 The Ford Mustang Mach 1 is a performance-oriented option package of the Ford Mustang, originally introduced by Ford in August 1968 as a package for the 1969 model year. The Mach 1 title adorned performance oriented Mustang offerings until the original retirement of the moniker in 1978. As part of a Ford heritage program, the Mach 1 package returned in 2003 as a high