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| factorofadhesion = | trainheating = | locobrakes = | locobrakeforce = | trainbrakes = | safety = | operator = Cape Government Railways South African Railways | operatorclass = SAR Class 4 | powerclass = | numinclass = 2 | fleetnumbers = CGR 850-851 SAR 1477-1478 | officialname = | nicknames = | axleloadclass = | locale = | deliverydate = 1911 | firstrundate = 1911 | lastrundate = | retiredate = | withdrawndate = 1938 | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = | notes = }} The South African Railways Class 4 4-8-2 of 1911 is a steam locomotive from the pre-Union era in the Cape of Good Hope. In 1911 the Cape Government Railways placed two steam locomotives with a Mountain type wheel arrangement in service. A year later, when they were assimilated into the South African Railways, they were renumbered and classified as Class 4.〔Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer’s Office, Pretoria, January 1912, pp. 8, 12, 15, 46 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)〕 ==Manufacturer== The first Mountain type locomotive of the Cape Government Railways (CGR) was designed at the Salt River shops as a heavy mixed traffic locomotive by H.M. Beatty, the Chief Locomotive Superintendent of the CGR from 1896 to 1910. The locomotives were a further development of the two experimental locomotives that had been placed in service by the CGR in 1906, the CGR Class 9 (SAR Class Experimental 5) and the CGR Class 10 (SAR Class Experimental 6), both built by Kitson and Company.〔〔 The Class 4 had bar frames, Stephenson valve gear with "D" valves and used saturated steam. The boiler was equipped with a combustion chamber, which reduced the distance between the tube plates to and made them excellent steamers.〔〔 Two locomotives were built by North British Locomotive Company (NBL) and delivered in 1911. While they were numbered 850 and 851 in the CGR numbering series, they were not designated a classification. The two locomotives were not identical, no. 850 being equipped with Ramsbottom safety valves while no. 851 had Cole’s muffled type Pop safety valves.〔〔〔North British Locomotive Company works list, compiled by Austrian locomotive historian Bernhard Schmeiser〕 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 4 4-8-2」の詳細全文を読む スポンサード リンク
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