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 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