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| factorofadhesion = | trainheating = | locobrakes = | locobrakeforce = | trainbrakes = | safety = | operator = Natal Government Railways South African Railways | operatorclass = NGR Class B SAR Class 1 | powerclass = | numinclass = 44 | fleetnumbers = NGR 275-318 SAR 1245-1288 | officialname = | nicknames = Hendrie B | axleloadclass = | locale = | deliverydate = 1904 | firstrundate = 1904 | lastrundate = | retiredate = | withdrawndate = Circa 1975 | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = | notes = }} The South African Railways Class 1 4-8-0 of 1904 is a steam locomotive from the pre-Union era in the Natal Colony. In 1904 the Natal Government Railways placed fifty Class B Mastodon type steam locomotives in service. Six of them were modified to a 4-8-2 Mountain type wheel arrangement in 1906. In 1912, when the remaining forty-four locomotives were assimilated into the South African Railways, they were renumbered and classified as .〔 ==Design== Because of the limited coal and water range of the existing fleet of Natal Government Railways (NGR) tank locomotives as well as the necessity to double and even triple head over the worst sections of the mainline, NGR Locomotive Superintendent D.A. Hendrie was tasked to produce a locomotive of greater power and capable of longer distances without refuelling or rewatering, to work the mainline’s steep 1 in 30 gradients.〔〔〔〔South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, as amended〕 His resulting Class B achieved this, being more powerful and with a longer range. When the designs were completed, Hendrie proposed that only five be ordered so that they may first be thoroughly tested in service before ordering more. The designs, however, were so well received that the NGR placed an immediate order for fifty with the North British Locomotive Company (NBL).〔 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 1 4-8-0」の詳細全文を読む スポンサード リンク
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