Since then, many kind of Stirling engines were manufactured with a view to increasing the output and the efficiency. But the engine had been made a poor production, in the back of Otto engine and Diesel engine. Because Otto engine invented by N. Otto on 1877 and Diesel engine invented by R. Diesel on 1893 were higher capacity than Stirling engine in those days.
I took this picture in 6th International Stirling Engine
Conference, Eindhoven (the Netherlands) on 1993.
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Koichi Hirata