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| factorofadhesion = | trainheating = | locobrakes = | locobrakeforce = | trainbrakes = | safety = | operator = South African Railways | operatorclass = Class NG G13 | powerclass = | numinclass = 12 | fleetnumbers = 49-50, 58-60, 77-83 | officialname = | nicknames = | axleloadclass = | locale = | deliverydate = 1927-1928 | firstrundate = 1927 | lastrundate = | retiredate = | withdrawndate = 1973 | preservedunits = | restoredate = | scrapdate = | currentowner = | disposition = | notes = }} The South African Railways Class NG G13 2-6-2+2-6-2 of 1927 is a narrow gauge articulated steam locomotive. In 1927 and 1928 the South African Railways placed twelve Class NG G13 Garratt articulated steam locomotives with a 2-6-2+2-6-2 Double Prairie type wheel arrangement in service on the Langkloof and Alfred County Railway narrow gauge lines. ==Manufacturer== In 1927 Hannoversche Maschinenbau AG (Hanomag), in consultation with the South African Railways (SAR), designed a locomotive which was to become the standard narrow gauge Garratt locomotive in South Africa for the next forty years. It was greatly improved from the Class NG G11, with trailing wheels added to each engine unit, outside bar frames instead of plate frames, round top fireboxes instead of Belpaire fireboxes, and larger dimensions in most respects except the grate area.〔 The initial order was for three Class NG G13 locomotives, numbered in the range from NG58 to NG60, that were delivered and placed in service in 1927. These locomotives were superheated and sported an extremely compact arrangement of Walschaerts valve gear and outside bar frames. The pilot wheels were arranged as conventional pony trucks, while the inner carrying wheels were built to the Gölsdorf system that allowed the axle some lateral movement.〔〔South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, as amended〕 Performance trials of the Class NG G13 proved it to be both powerful and free steaming, despite having a smaller grate area than the predecessor . This resulted in an immediate order for another two locomotives, numbers NG49 and NG50, and even before these were delivered, another seven, numbered in the range from NG77 to NG83. The second and third orders were both delivered in 1928.〔 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 NG G13 2-6-2+2-6-2」の詳細全文を読む スポンサード リンク
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