X-59's first flight

NASA’s X-59 flew its first wheels-up test flight on April 3, 2026, a step toward showing whether its shape can soften a sonic boom into a quieter thump. (nasa.gov) The aircraft took off from NASA’s Armstrong Flight Research Center in Edwards, California, with NASA test pilot Jim “Clue” Less at the controls. NASA said the flight lasted 90 minutes, reached 20,000 feet, and topped out at about 460 miles per hour. (nasa.gov) A wheels-up flight means the landing gear retracts into the body of the airplane, letting engineers see the jet in its intended smooth shape instead of with gear hanging below it. NASA said that shape is central to the X-59’s plan to spread shock waves in a way that produces a quieter sound on the ground. (nasa.gov) Supersonic flight means flying faster than the speed of sound, but over land that usually creates a sharp sonic boom that has been restricted for decades. NASA said the X-59 is built to fly at about 1.4 times the speed of sound, or roughly 925 miles per hour, while replacing that boom with what the agency calls a sonic thump. (nasa.gov) That is the policy target behind the program. NASA’s Quesst mission is collecting data it plans to share with United States and international regulators as they consider future noise limits for commercial supersonic flights over land. (nasa.gov) The X-59 is no longer at its first-flight stage. NASA said the aircraft made its first flight on October 28, 2025, with the landing gear down, and had completed eight flights as of April 10, 2026, as the test campaign expanded. (nasa.gov; nasa.gov) NASA said the second flight, on March 20, 2026, ended early after a cockpit warning, but a post-flight investigation found the alert came from incorrectly installed instrumentation rather than a real vehicle problem. The agency said the issue was fixed before the third flight. (nasa.gov) Lockheed Martin built the one-of-a-kind research aircraft for NASA, and the agency publicly unveiled it in Palmdale, California, on January 12, 2024. NASA lists the Quesst mission through 2029, with later phases focused on supersonic flights over communities and surveys of how people react to the sound. (nasa.gov; nasa.gov) The next tests will push the X-59 faster and higher through what NASA calls envelope expansion, the step-by-step process of proving how an experimental aircraft behaves across more of its operating range. The wheels-up flight did not make the X-59 supersonic yet, but it moved the program closer to that point. (nasa.gov; nasa.gov)