Is supersonic flight banned in the US?

Within a few years, the FAA formally proposed a rule to restrict the operation of civil aircraft at speeds greater than Mach 1. In 1971, Congress officially canceled the SST program. The ban on civilian supersonic flights over land went into effect in 1973, and the ban remains in effect today.



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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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In any case, supersonic air travel for the masses looks like it's genuinely back on the cards. Boom is aiming for the first Overture test flights to take off in 2026 and for the planes to go into public service by 2029.

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Flying faster than the speed of sound is inherently energy-intensive, in part because supersonics use powerful, narrow engines to produce the high thrust needed to break the sound barrier.

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Changes in speed are expressed in multiples of gravitational acceleration, or 'G'. Most of us can withstand up to 4-6G. Fighter pilots can manage up to about 9G for a second or two. But sustained G-forces of even 6G would be fatal.

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If you're WONDERing about how pilots handle sonic booms, they actually don't hear them. They can see the pressure waves around the plane, but people on board the airplane can't hear the sonic boom. Like the wake of a ship, the boom carpet unrolls behind the airplane.

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