The U.S. Air Force is considering plans to build a dual-role, large-scale demonstrator to prove technology for the Reusable Booster System (RBS) space launcher as well as providing a “flying wind tunnel” for hypersonic engines. The RBS is intended as a military space launcher replacement for the Evolved Expendable Launch Vehicle family beyond 2025 and will use a reusable first-stage booster designed to return to a runway landing at the launch site. A sub-scale demonstrator—Pathfinder—is ...


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