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The South African Railways Class 3 4-8-2 of 1909 is a steam locomotive from the pre-Union era in the Natal Colony. In 1909 the Natal Government Railways placed the world’s first true Mountain type locomotive in service when five Class B tender locomotives were commissioned. Twenty-five more were placed in service in 1911. In 1912, when they were assimilated into the South African Railways, they were renumbered and classified as Class 3. The Mountain wheel arrangement went on to become the most numerous steam locomotive wheel configuration in use in South Africa.〔Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer’s Office, Pretoria, January 1912, pp. 7, 12, 15, 45-46 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)〕 ==Manufacturer== With increasing coal traffic in Natal, the demand arose for more powerful locomotives. The Class B of 1909, also known as the Hendrie D, was a heavy locomotive designed by Natal Government Railways (NGR) Locomotive Superintendent D.A. Hendrie to handle coal traffic on the upper Natal mainline.〔〔 They were based on his Class B 4-8-0, in its modified form of 1906 as the Altered Class B 4-8-2, but this time making full use of the potential of the pony truck under the cab to carry additional weight by positioning the firebox to the rear of the driving wheels, which made an improved grate and ashpan possible. To accomplish this, the plate frame was equipped with a cast bridle at the rear to accommodate the improved firebox design. Five locomotives were built by the North British Locomotive Company (NBL) and delivered in 1909, numbered in the range from 330 to 334.〔〔〔North British Locomotive Company works list, compiled by Austrian locomotive historian Bernhard Schmeiser〕〔South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, as amended〕 The first five locomotives were put to work between Estcourt and Charlestown on the Transvaal border. They proved to be highly successful in use on all kinds of traffic, which led to an order for another twenty-five locomotives from NBL in 1910. They were delivered in 1911 and numbered in the range from 345 to 369 on the NGR roster.〔〔〔〔 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 3 4-8-2」の詳細全文を読む スポンサード リンク
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