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Update On Results Of Spre Testing At Nasa

The Space Power Research Engine (SPRE I), a free-piston Stirling engine with linear alternator, is being tested at NASA Lewis Research Center as part of the Civil Space Technology Initiative (CSTI) as a candidate for high capacity space power. This paper presents results of baseline engine testing, since last reported, at design and off design operating conditions, with particular emphasis on effects of operating temperatures. Test results are compared with HFAST code predictions.