The North American X-15 may be the fastest plane in the world, with speeds at 4,520 mph and Mach 5.93. It's an experimental aircraft used and powered by NASA and USAF.
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Speed is often measured in kilometers per hour, but also in Mach, which corresponds to the speed of sound. For reference, Mach 1 is approximately 1,230 km/h. The Blackbird, an American military aircraft, holds the title of the fastest aircraft in the world with a top speed of Mach 3.32, or 3,540 km/h.
1. Bombardier Global 8000 – Mach 0.94 (721 mph) Set to be delivered in 2025, the Global 8000 is the world's fastest business jet. It broke the sound barrier to reach Mach 1.015 during testing and became the first plane to go supersonic using sustainable aviation fuel (SAF).
Cessna Citation X+Though no longer in production, the Citation X+ is hugely sought after on the secondhand market and is on record as the world's fastest private jet. The FAA certified the Citation X in 1996 and pegged its maximum speed at Mach 0.935, or 717 miles per hour.
If human manoeuvre that speed Mach 1(1225 Kph), the air friction will increase the body temperature enormously.It will almost boil the body. The strange symptoms including temporary vision loss, loss of consciousness and weightlessness. The turbulence causes parts of the body swell out.