Which experimental plane broke the sound barrier on October 14, 1947? - Alea-Quiz

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Which experimental plane broke the sound barrier on October 14, 1947?

Answer

Bell X-1 was the first aircraft to break the sound barrier in horizontal flight (October 14, 1947). Developed specifically for this purpose as part of the USAAF and NACA (NASA's predecessor) X-Planes research program, it is built by Bell Aircraft Corporation.

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