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CGR 3rd Class 4-4-0 1884
The Cape Government Railways 3rd Class 4-4-0 of 1884 is a South African steam locomotive from the pre-Union era in the Cape of Good Hope.
In 1884 the Cape Government Railways placed two experimental 3rd Class tender locomotives with a 4-4-0 American type wheel arrangement in service. They were designed by the Cape Eastern System to be able to use the low-grade local coal with its high content of incombustible matter.〔''C.G.R. Numbering Revised'', Article by Dave Littley, SA Rail May–June 1993, pp. 94-95.〕
==Stormberg coalfields==
The extension of the Cape Government Railways (CGR) Eastern System's line from Queenstown reached Sterkstroom in 1883 and passed through the Stormberg coalfields where the Molteno and Cyphergat mines were operating.〔〔''The South African Railways - Historical Survey''. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, pp. 12-13.〕
While the Colonial coal was much cheaper than imported coal, it had a non-combustable content of as high as 29%, which led to difficulties when used in locomotives since it frequently caused train delays to allow the firemen to clear the grate of clinker and ash. In attempts to overcome the problem, J.D. Tilney, the Eastern System's Locomotive Superintendent, carried out many experiments on some of the 4th Class 4-6-0TT locomotives that had entered service on the Eastern System in 1880, chief of which involved modifying the boilers and frames to accommodate oscillating firebars and larger fireboxes.〔
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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