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LNWR 17in Coal Engine
The LNWR 17in Coal Engine was a class of 0-6-0 steam tender engines designed by Francis Webb for the London and North Western Railway. They were simple locomotives and in UK service they were very reliable.〔 "17in" refers to their cylinder diameter in inches. They were called "Coal Engines" because they were used for hauling coal trains.
==Design and Construction==
The ''17in Coal'' was the first new design of engine to be built by Webb since he became Chief Engineer of the LNWR in September 1871. A policy of 'low costs' was in force at the LNWR, with running costs per engine mile reduced from d per engine mile in 1857 to d by 1871.〔Nock, 1952, p. 61〕 The first 17in Coal was constructed in 1873, the first of five hundred built. Ernest L. Ahrons is quoted as regarding the type as "probably the simplest and cheapest locomotives ever made in this country",〔Nock, 1952, p. 64〕 and O.S. Nock described them as "splendid".〔
Many aspects of the 17in Coal's design reflected John Ramsbottom's final design: the 0-6-0 Saddle Tank, including the identical wheel diameter and cylinder dimensions, but the new engines had a larger, improved boiler.〔 In February 1878, one engine of this design was built from scratch in hours.
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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