Mach 4

Mach 4 or variant, may refer to:Mach number for four times the speed of sound Supersonic speed of 4 times the speed of sound MACH-4 , a comic book superhero Fly Castelluccio Mach 4, a paramotor aircraft Kawasaki H2 Mach IV, the "Mach IV" motorcycle .17 Mach IV, the .17-calibre Mach IV center-fire rifle bullet Mach IV, a personality rating on the rating scale Dark Triad Dirty Dozen Mach 4, a version of the Mach microkernel developed at the University of Utah