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Story highlights. 1  Chuck Yeager was the first test pilot to break the sound barrier. 2  In 1947, he flew past Mach 1 after being dropped from a B-29 bomber at 45,000 feet. 3  Yeager said he laid down a pretty good sonic boom over Edwards Air Force Base.
The Myth of the 'Sound Barrier'. As pilots approached the speed of sound (which varies depending on the type of medium and the temperature of the medium), they would encounter control issues, he said. There were a lot of near crashes and incidents associated with flying near the speed of sound, he said.