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Long Boiler locomotive : ウィキペディア英語版 | Long Boiler locomotive
The Long Boiler locomotive was the object of a patent by Robert Stephenson and the name became synonymous with the pattern. It is generally perceived that it arose out of attempts to match the power of broad gauge locomotives within the limitations of the standard gauge of Stephenson railways. However, the patent originally arose from a problem which became apparent as trains travelled longer distances, specifically on the North Midland Railway in England around 1841, where fire tubes and smokeboxes were becoming destroyed by the heat. ==Experiments== Experiments at the North Midland's Derby Works showed temperatures as high as 773 degrees Fahrenheit, determined by placing a small cup of zinc within the smokebox beneath the chimney. Stephenson extended the boiler, and hence the firetubes, from the usual nine feet to thirteen or fourteen feet. Placing tin in the smokebox, he found that it just began to melt, indicating a temperature of 442 degrees.
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「Long Boiler locomotive」の詳細全文を読む
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