The Bell X-1 is a rocket-powered aircraft that made history by being the first to break the sound barrier. On October 14, 1947, it achieved this milestone, piloted by Chuck Yeager. The aircraft was designed specifically for high-speed flight and was shaped like a bullet to reduce drag. The Bell X-1 was developed by the Bell Aircraft Corporation and was part of a series of experimental flights to explore supersonic flight. Its success paved the way for future advancements in aviation and contributed significantly to the understanding of aerodynamics at high speeds.