FLOW PATH: NASA's Glenn Research Center has hot-fire tested the flowpath for a rocket-based combined cycle engine in its hypersonic test facility, achieving 300 pounds of thrust in a 16% scale flowpath at Mach 6. Glenn Director Donald J. Campbell tells NASA's senior staff work is progressing smoothly as researchers strive to identify performance of the trailblazer RBCC system, which uses ambient gaseous hydrogen as a fuel in the first fueled test of the flowpath. Aerojet is under contract to ...

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