Ernst Mach of experimental physics concentrated on the interference, diffraction, polarization and refraction of light in different media under external influences. From there followed important explorations in the field of supersonic fluid mechanics. Mach and physicist-photographer Peter Salcher presented their paper on this subject in 1887; it correctly describes the sound effects observed during the supersonic motion of a projectile. They deduced and experimentally confirmed the existence of a shock wave of conical shape, with the projectile at the apex. The ratio of the speed of a fluid to the local speed of sound "v"/"v" is now called the Mach number. It
Mach Loop Typhoon, Hawk jets and C-130J and Short Tucanoas well as U.S. Air Force F-15C Eagles, F-15E Strike Eagles, which are based at RAF Lakenheath in eastern England and MC-130 and V-22 Osprey from RAF Mildenhall. Many flight simulators have replicated the Mach Loop in Wales, but a notable one is present in the FlightGear flight simulator, created by the FGUK community as an add-on for the simulator, providing the player with the challenge of guiding aircraft at high speed through rings that mark the route. In addition, the scenario has "start" and "finish" points, and each run in the Mach