Seventy-five years ago, on October 14, 1947, the Bell X-1 Glamorous Glennis, piloted by U.S. Air Force Captain Charles E. “Chuck” Yeager, became the first airplane to fly faster than the speed of sound (Mach 1). The experimental purpose-built aircraft reached 1,127 kilometers (700 miles) per hour (Mach 1.06).

The year 1947 was a historic milestone in aviation history, as it saw the breaking of the "Sound Barrier." On October 14, 1947, Captain Charles "Chuck" Yeager flew the Bell X-1 rocket engine aircraft to a speed of Mach 1.06 (approx. 700 mph or 1,127 km/h) at an altitude of 43,000 feet over the Mojave Desert. This was the first time a piloted aircraft achieved level, supersonic flight. Before this historic flight, the fastest operational aircraft were typically high-performance jet fighters like the British Gloster Meteor or the American Lockheed P-80 Shooting Star, which reached top speeds around 600–620 mph. The Bell X-1's achievement fundamentally changed aerospace engineering, proving that aircraft could survive the extreme turbulence and pressure changes associated with transonic flight. While the X-1 was an experimental research plane launched from a B-29 bomber, its 1947 record paved the way for the supersonic era and remains one of the most significant technological triumphs of the 20th century, marking the transition from subsonic to supersonic capability.