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Also called sonic barrier, transonic barrier. (not in technical use) a hypothetical barrier to flight beyond the speed of sound, so postulated because aircraft undergo an abruptly increasing drag force induced by compression of the surrounding air when traveling near the speed of sound.
break the sound barrier, to travel faster than the speed of sound.
(not in technical usage) a hypothetical barrier to flight at or above the speed of sound, when a sudden large increase in drag occurs Also called sonic barrier, transonic barrier
sound barrier
The sharp increase in drag experienced by aircraft approaching the speed of sound. Also called sonic barrier.


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