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|length = |locoweight = |fueltype = Coal |fuelcap = |watercap = |firearea = |boilerpressure = |totalsurface = |cylindercount = Two, outside |cylindersize = |tractiveeffort = |operator = |operatorclass = L&YR: 21 |powerclass = LMS: 0F |fleetnumbers = LMS: 11200–11257 |retiredate = 1910–1963 |numinclass = ''1 January 1923:'' 58; ''1 January 1948:'' 23 |disposition = Two preserved, remainder scrapped }} The L&YR Class 21 is a class of small 0-4-0ST steam locomotive built by the Lancashire and Yorkshire Railway for shunting duties. They were nicknamed ''Pugs''. == Construction history == The class originates in the purchase of three saddle tank locomotives ordered from Vulcan Foundry in 1886. They were fitted with an long, diameter boiler pressed to powering two outside cylinders connected to driving wheels. The wheelbase was and the total heating surface of the saturated boiler was . J. A. F. Aspinall then ordered more locomotives of a modified design: the wheelbase was shortened to , the tank was extended over the smokebox, the cab was enlarged, and the boiler pressure raised to . Seventeen of this modified design were ordered from Horwich Works in three batches; Aspinall's successor Henry Hoy order another batch of 10; and Hoy's successor George Hughes ordered 30 more in two batches. The last locomotive was delivered in July 1910, four months before the first retirement; 917 and 918 were withdrawn in November that year, but were not scrapped until November 1912. 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「L&YR Class 21」の詳細全文を読む スポンサード リンク
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