Science and Technology United States Tests Scramjet with X-43A Hyper-X, Accelerates to Mach 9.6 at 33,223 Meters, Surpasses 10,800 km/h, Burns Engine for About 10 Seconds Without Compressor or Turbine, Proves Hypersonic Flight Can Use Oxygen from Air to Sustain Combustion Valdemar Medeiros 05/02/2026 at 01:02
