✈️ Aircraft Specifications
| Designation | X-1 |
| Manufacturer | Bell Aircraft |
| Country of Origin | United States |
| First Flight | 1947 |
| Length | 9.45 m (31 ft) |
| Max Speed (Mach) | 1.06 |
| Max Speed (km/h) | 1,299 km/h |
| Service Ceiling | 21,900 m (71,854 ft) |
| Engine | XLR-11 rocket engine |
| Crew | 1 |
| Status | Retired |
Overview
The Bell X-1 was the first crewed aircraft to exceed the speed of sound in level flight. On October 14, 1947, Captain Chuck Yeager piloted the X-1 named ‘Glamorous Glennis’ to Mach 1.06 at an altitude of 43,000 feet over the Mojave Desert, forever changing the course of aviation history.
Design & Development
Designed to resemble a .50 caliber bullet—known for its stability at supersonic speeds—the X-1 featured thin, unswept wings and a streamlined fuselage. It was powered by an XLR-11 rocket engine with four chambers producing 6,000 lbf of thrust. The aircraft was air-launched from a modified B-29 Superfortress at approximately 25,000 feet.
Operational History
The X-1 program conducted 157 flights between 1946 and 1958. Beyond breaking the sound barrier, it reached speeds up to Mach 1.45 and altitudes of 71,902 feet, providing invaluable data on transonic and supersonic aerodynamics that shaped all future supersonic aircraft design.
Legacy
The original X-1 now hangs in the Smithsonian National Air and Space Museum alongside the Wright Flyer and Spirit of St. Louis—a testament to its place as one of the most important aircraft in history.
Armament & Weapons
The X-1 was a pure research aircraft and carried no weapons. Its sole purpose was to explore transonic and supersonic flight regimes. All available weight was dedicated to the XLR-11 rocket engine fuel (ethyl alcohol and liquid oxygen) and flight test instrumentation.
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Frequently Asked Questions
How fast is the Bell X-1?
The Bell X-1 achieved a maximum speed of Mach 1.45 (approximately 957 mph). Its most famous flight on October 14, 1947, reached Mach 1.06, breaking the sound barrier for the first time.
Is the Bell X-1 still in service?
The X-1 was a research aircraft that flew 157 flights between 1946 and 1958. The original X-1 “Glamorous Glennis” is now displayed at the Smithsonian National Air and Space Museum.
How many Bell X-1 aircraft were built?
Three X-1 aircraft were built by Bell Aircraft Corporation.
Who was the first pilot to break the sound barrier?
Captain Chuck Yeager broke the sound barrier on October 14, 1947, flying the X-1 nicknamed “Glamorous Glennis” over the Mojave Desert at an altitude of 43,000 feet.