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De Beeler was an aeronautical engineer for NACA, the predecessor to NASA. He helped design the X-1, which was the first airplane to break the sound barrier. Slick Goodlin was a test pilot for Bell ...
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Boom Supersonic's XB-1 jet breaks sound barrier 3 times on final test flight (video, photos)The XB-1 broke the sound barrier three times during its 13th and ... Boom's chief flight test engineer, said during Monday's livestream. "What we have done now, six times, is shown the world ...
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