NASA Aeronautics(@NASAaero):✈️ ANOTHER MILESTONE UNLOCKED: NASA’s X-59 reaches speed, altitude for future quiet supersonic flight testing! NASA's X-59 experimental aircraft achieved a major milestone June 12, reaching Mach 1.4 (about 924 mph) and an altitude of 55,000 feet – its fastest and highest flight so far, and the conditions required for future mission-critical tests. These flights are focused on performance, the quiet flights are coming soon. After acoustic validation, NASA’s Quesst mission will fly the aircraft over several U.S. communities 🏘️ to collect data on public perception of the quieter sonic thump the aircraft will make at supersonic speeds. 🔊 ✈️ Learn more: https://t.co/5qhgOsSpBW #NASA #X59 #Quesst

2026.06.12 19:39

✈️ ANOTHER MILESTONE UNLOCKED: NASA’s X-59 reaches speed, altitude for future quiet supersonic flight testing! NASA's X-59 experimental aircraft achieved a major milestone June 12, reaching Mach 1.4 (about 924 mph) and an altitude of 55,000 feet – its fastest and highest flight so far, and the conditions required for future mission-critical tests. These flights are focused on performance, the quiet flights are coming soon. After acoustic validation, NASA’s Quesst mission will fly the aircraft over several U.S. communities 🏘️ to collect data on public perception of the quieter sonic thump the aircraft will make at supersonic speeds. 🔊 ✈️ Learn more: #NASA# #X59# #Quesst#