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
Kawasaki S1 Mach I Mach I emerged nearly one year after its bigger brother, the S2 Mach II 350, and from the development success of the Kawasaki H1 Mach III. It was essentially the same motorcycle as its larger brother with less displacement. It had a separate handlebar holder and steering friction damper. Its successor, the KH250, was essentially the same bike with a different name, was marketed from 1976 to 1981. Kawasaki S1 Mach I The Kawasaki Mach I (model designation S1) was a Kawasaki motorcycle made 1972 through 1975. The Mach I was a direct result of the widespread success of the