As it waits for a follow-on to the X-51A scramjet engine demonstrator program to get underway, the U.S. Air Force Research Laboratory (AFRL) is looking to international projects to advance hypersonics research for applications ranging from high-speed weapons to space-access vehicles. Beyond the Hypersonic Flight Research (HiFire) program underway with Australia, the lab has signed a cooperative research and development agreement (Crada) with the U.K.’s Reaction Engines (REL) and is ...


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