“Scramjet-powered vehicles are envisioned to operate at speeds up to at least Mach 15,” NASA said after this program for ...

Twenty-two years after NASA sent the X-43A screaming across the Pacific at Mach 9.6, the United States is spending heavily to turn hypersonic speed into usable military power. The Defense Department’s ...

Record-breaking flight: In 2004, NASA’s X‑43A reached Mach 9.6, setting a still‑unbroken speed record for an air‑breathing aircraft. Pioneering scramjet tech: The Hyper‑X program proved scramjets ...

NASA has slipped the next test of the X-43A hypersonic testbed until late January 2004, because of an intermittent failure in an actuator associated with its air-launched Pegasus booster. NASA's B-52 ...

NASA’s second attempt to fly an X-43A air-breathing hypersonic test aircraft is set for mid-December. The first effort ended with the destruction of the vehicle over the Pacific on 2 June 2001.