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The South African Railways Class GEA 4-8-2+2-8-4 of 1946 is an articulated steam locomotive. During 1946 and 1947 the South African Railways placed fifty Class GEA Garratt articulated steam locomotives with a 4-8-2+2-8-4 Double Mountain type wheel arrangement in service.〔South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, as amended〕 ==Manufacturer== The Class GEA 4-8-2+2-8-4 Double Mountain type Garratt locomotive was the first post-World War II locomotive to be introduced on the South African Railways (SAR). It was designed by Dr. M.M. Loubser, Chief Mechanical Engineer (CME) of the SAR from 1939 to 1949, and although it was a development of the Class GE 2-8-2+2-8-2 locomotive, it bore little resemblance to the older locomotive. It embodied the latest SAR practices, with a boiler that was designed to be interchangeable with that of the earlier Garratt model, but it had a bar frame as well as a round-topped firebox instead of the earlier Belpaire firebox. The Class GEA was the first South African Garratt to have streamlined water tanks and coal bunkers, and its engine units were radically different with an expanded wheel arrangement.〔〔〔〔 An order for fifty locomotives was placed with Beyer, Peacock and Company (BP) in 1945, the largest single Garratt order ever placed with BP. When they were delivered during 1946 and 1947, they were erected at the Uitenhage shops and numbered in the range from 4001 to 4050.〔〔〔 The locomotives were superheated and had Walschaerts valve gear. They were the only post-war Garratts on the SAR to be without mechanical stokers and also one of the largest designs of Garratt to be hand fired. They were designed for goods traffic on light rail on branchlines.〔〔 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 GEA 4-8-2+2-8-4」の詳細全文を読む スポンサード リンク
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