The first plane to break the sound barrier.
The X-1, manufactured by Bell Aircraft Corporation was the crowning achievement of post-World War II American aeronautics. It was the first of the X-planes—a series of rocket and jet-powered aircraft that were not intended to be put into production, but rather were used for research purposes. The flight data the X-series gathered was used to improve future airplane designs.
During the 1930s and 1940s, aircraft approaching the...
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