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Glow plug (model engine)
A glow plug engine, or glow engine, is a type of small internal combustion engine typically used in model aircraft, model cars and similar applications. The ignition is accomplished by a combination of heating from compression, heating from a glow plug and the catalytic effect of the platinum within the glow plug on the methanol within the fuel.
==History==
American inventor Ray Arden invented the first glow plug for model engines in 1947. Born in New York on February 24, 1890, Arden sold over 300 inventions, mainly toys, in the 1920s. In the late 1940s Arden invented miniature ignition engines while attempting to build the world's smallest model airplane engine. Methanol fuel came onto the market after World War II as a source of fuel for model engines. A couple of Arden's friends were running an ignition model engine and to their amazement, when they turned it off, the engine kept running. They investigated why this was and discovered that a fault in the spark plug had caused a part of it to become red hot. They called their friend Arden and the glow plug was born. From then on, model engines became much simpler, no longer requiring the additional weight, bulk, and complexity of points, ignition coils, condensers, timers and batteries.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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