U.K.-based Reaction Engines has signed an agreement with the U.S. Air Force Research Lab (AFRL) to explore the potential of the company’s Sabre advanced cycle air-breathing rocket engine. The company ...

Britain is forging ahead in aerospace innovation with a bold plan to develop a hypersonic vehicle, dubbed The Sabre, capable of flying at Mach 5 (around 4,000 mph). Led by the UK-based engineering ...