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NASA's X-59 Supersonic Jet Set for Second Flight Thursday

NASA’s X-59 will incrementally increase speed and altitude to Mach 1.4 at 55,000 feet during envelope expansion, aiming to validate low-boom supersonic flight technology.

  • On March 19, NASA will fly the X-59 experimental aircraft from Edwards Air Force Base, California, beginning the envelope expansion phase near NASA Armstrong Flight Research Center.
  • Following its maiden flight, the program is entering methodical envelope expansion to stretch the X-59 experimental aircraft beyond its initial performance and prepare for Phase 2: Acoustic Validation over American communities.
  • Starting with low‑speed checks, the team will incrementally push performance from 230 mph at 12,000 feet to 260 mph at 20,000 feet, then to Mach 1.4 at 55,000 feet following the envelope expansion ladder.
  • After a detailed teardown, engineers from NASA and Lockheed Martin reassembled the X-59, which has its long nose and engine placement designed to produce a soft 'thump' for people on the ground.
  • Pilot Jim 'Clue' Less will take the stick for the second flight, his first X-plane assignment, while Nils Larson observes from a NASA F/A-18 chase plane as the X-59 seeks data to address the commercial supersonic flight ban over land.
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www broke the news in on Tuesday, January 13, 2026.
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