When NASA unveiled its new vision for aeronautics research in 2013, part of the strategy was to get back to flying X-planes and enable its researchers to “learn by doing”—a culture eroded over the decades as budgets became smaller and risks less tolerable. As a flagship for the return-to-flight research, NASA’s distributed electric propulsion testbed, the Scalable Convergent Electric Propulsion Technology Operations Research (Sceptor) program, is ...


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