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The South African Railways Class 19 4-8-2 of 1928 is a steam locomotive. In 1928 the South African Railways placed four Class 19 steam locomotives with a Mountain type wheel arrangement in service. One of them was later reboilered and reclassified to Class 19R.〔South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, pp21 & 21A, as amended〕 ==Manufacturer== At the request of Colonel F.R. Collins, Chief Mechanical Engineer (CME) of the South African Railways (SAR) from 1922 to 1929, the basic design of the 4-8-2 steam locomotive was done by Test Engineer M.M. Loubser, himself later to be appointed as CME from 1939 to 1949. In 1928 four locomotives were built in Berlin by Berliner Maschinenbau AG (BMAG), the former L. Schwartzkopff, numbered in the range from 1366 to 1369.〔Information supplied by R.S. Loubser, son of M.M. Loubser〕 They were superheated, built on bar frames and used Walschaerts valve gear. Built as a lighter branchline development of the earlier Class 15C and Class 15CA 4-8-2 mainline locomotives, they proved to be extremely successful. Following the pilot project with the four Class 19 locomotives, four variants on the class were acquired over the next twenty-one years.〔 * The slightly smaller Class 19A in 1929. * The Class 19B in 1930. * The Class 19C in 1935. * The Class 19D between 1936 and 1949. The Class 19 family earned a reputation for reliability, easy handling, long periods between overhauls and economical operation. While preparing the specifications, Loubser gave considerable thought to the layout of this locomotive that was essentially a completely new type of branchline engine. The Research and Test Department was consulted on the most suitable wheel arrangement and other design details, and the end result more than justified the amount of care and thought taken during the design process.〔 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「South African Class 19 4-8-2」の詳細全文を読む スポンサード リンク
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