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:''This article relates to European tram engines. For U.S. tram engines see Steam dummy'' A tram engine is a locomotive specially built, or modified, to work on a street, or roadside, tramway. ==Steam tram engines== In the steam locomotive era, tram engines had to comply with certain legal requirements, although these varied from country to country: * The engine must be governed to a maximum speed of 16 km per hour (12 in the UK) * No steam or smoke may be emitted * It must be free from noise produced by blast or clatter * The machinery must be concealed from view at all points above 10 centimeters from rail level To avoid smoke, the fuel used was coke, rather than coal. To prevent visible emission of steam, two opposite systems were used: * condensing the exhaust steam and returning the condensate to the water tank * Reheating the exhaust steam to make it invisible 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Tram engine」の詳細全文を読む スポンサード リンク
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