Can a civilian fly Mach 1?

The FAA's existing restrictions can be found at 14 CFR Part 91.817. In essence, that regulation prohibits anyone from operating a civil aircraft at a true flight Mach number greater than 1 over land in the United States and from a certain distance off shore where a boom could reach U.S. shores.



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The Bombardier Global 8000 During a flight test in May 2021, the Bombardier Global 8000 broke the sound barrier, reaching Mach 1.015 (1243 kph), as confirmed by a NASA-operated Boeing F-18, which accompanied the aircraft during testing. It also reached this speed while flying on SAF (Sustainable Aviation Fuel).

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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.

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Original flight tests of 747s conducted in 1969 and 1970 took 747-100 models to speeds of Mach 0.99. In addition, Boeing knows one case in which a 747 operated by Evergreen International made an emergency descent at speeds that exceeded Mach 1.

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The transonic regime 80, though no commercial aircraft in operation today exceeds Mach 1. Instead, they can achieve transonic speeds, including the Boeing 747–8I (cruising speed of Mach 0.86) and Airbus 380 (cruising speed of Mach 0.85).

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Fifty years ago, the federal government banned all civilian supersonic flights over land. The rule prohibits non-military aircraft from flying faster than sound so their resulting sonic booms won't startle the public below or concern them about potential property damage.

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Fifty years ago, the federal government banned all civilian supersonic flights over land. The rule prohibits non-military aircraft from flying faster than sound so their resulting sonic booms won't startle the public below or concern them about potential property damage.

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The average cruising speed of a helicopter is generally less than 160 knots (184 MPH). A fixed-wing aircraft may be as high as 450 knots (517 MPH). There is simply no helicopter that can cross continents at speeds approaching Mach 1 (the speed of sound), but several fixed-wing aircraft have done this.

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The typical private jet is substantially lighter than a commercial plane. Due to the decreased air density at higher altitudes, the aircraft has less drag and may thus fly at faster speeds. It's risky to fly too high since it would take longer to descend to a safe height in case of an emergency.

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