NASA adds two retired USAF F-15s to Armstrong fleet to support X-59 high‑altitude supersonic trials
NASA has brought two retired U.S. Air Force F-15 fighters into its Armstrong Flight Research Center fleet at Edwards AFB to act as chase/support aircraft for high‑altitude, supersonic testing of the X-59 quiet‑boom demonstrator. The jets will be modified to enable chase, instrumentation and data collection during supersonic profiles.