Mach number Mach number In fluid dynamics, the Mach number (M or Ma) (; ) is a dimensionless quantity representing the ratio of flow velocity past a boundary to the local speed of sound. where: By definition, at Mach1, the local flow velocity is equal to the speed of sound. At Mach0.65, is 65% of the speed of sound (subsonic), and, at Mach1.35, is 35% faster than the speed of sound (supersonic). The local speed of sound, and thereby the Mach number, depends on the condition of the surrounding medium, in particular the temperature. The Mach number is primarily used to determine
Mach 1 Racing standings, he left the team for Jackson Bros. Motorsports, taking Skoal and No. 33 with him. In 1989, Mach 1 switched to the No. 66 and signed rookie driver Rick Mast. In their first race together, the Daytona 500, Mast drove the unsponsored car to a sixth-place finish, an accomplishment he later said was the one he was the most proud of. Mast and Mach 1 ran twelve more races together that season, they were unable to duplicate that effort. Needham closed the team and sold it to their crew chief, Travis Carter. Travis Carter Motorsports entered NASCAR competition in