This article is about one of two different Natal Government Railways locomotive types to be designated "Class H". For the other, see
South African Class C1 4-6-2T.
The South African Railways Class C2 4-6-4T of 1896 was a steam locomotive from the pre-Union era in the Colony of Natal.
Quick Facts NGR Class H 4-6-4T, Type and origin ...
NGR Class H 4-6-4T South African Class C2 4-6-4T |
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NGR Class H 4-6-4T no. 39 arriving at Port Shepstone with the afternoon train from Durban, c. 1905 |
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Specifications |
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Configuration:
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• Whyte | 4-6-4T (Baltic) |
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• UIC | 2'C2'n2t |
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Driver | 2nd coupled axle |
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Gauge | 3 ft 6 in (1,067 mm) Cape gauge |
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Leading dia. | 25+3⁄4 in (654 mm) |
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Coupled dia. | 39 in (991 mm) |
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Trailing dia. | 25+3⁄4 in (654 mm) |
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Wheelbase | 25 ft 7+1⁄4 in (7,804 mm) |
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• Axle spacing (Asymmetrical) | 1-2: 3 ft 7+1⁄2 in (1,105 mm) 2-3: 4 ft 1+1⁄2 in (1,257 mm) |
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• Leading | 5 ft (1,524 mm) |
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• Coupled | 7 ft 9 in (2,362 mm) |
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• Trailing | 5 ft (1,524 mm) |
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Length:
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• Over couplers | 31 ft 5+1⁄4 in (9,582 mm) |
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Height | 11 ft 7+1⁄2 in (3,543 mm) |
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Frame type | Plate |
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Axle load | 7 LT 18 cwt (8,027 kg) |
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• Leading | 5 LT 10 cwt (5,588 kg) |
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• 1st coupled | 7 LT (7,112 kg) |
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• 2nd coupled | 7 LT 18 cwt (8,027 kg) |
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• 3rd coupled | 7 LT 4 cwt (7,316 kg) |
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• Trailing | 5 LT 10 cwt (5,588 kg) |
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Adhesive weight | 22 LT 2 cwt (22,450 kg) |
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Loco weight | 33 LT 2 cwt (33,630 kg) |
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Fuel type | Coal |
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Fuel capacity | 2 LT (2.0 t) |
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Water cap. | 1,130 imp gal (5,140 L) |
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Firebox: | |
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• Type | Round-top |
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• Grate area | 11 sq ft (1.0 m2) |
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Boiler:
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• Pitch | 5 ft 7 in (1,702 mm) |
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• Diameter | 3 ft 2+7⁄8 in (987 mm) |
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• Tube plates | 10 ft 3+1⁄2 in (3,137 mm) |
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• Small tubes | 130: 1+3⁄4 in (44 mm) |
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Boiler pressure | 145 psi (1,000 kPa) |
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Safety valve | Ramsbottom |
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Heating surface: | |
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• Firebox | 58 sq ft (5.4 m2) |
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• Tubes | 611 sq ft (56.8 m2) |
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• Total surface | 669 sq ft (62.2 m2) |
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Cylinders | Two |
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Cylinder size | 14 in (356 mm) bore 21 in (533 mm) stroke |
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Valve gear | Stephenson |
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Couplers | Johnston link-and-pin |
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Career |
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Operators | Natal Government Railways South African Railways |
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Class | NGR Class H, SAR Class C2 |
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Number in class | 1 |
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Numbers | NGR 21, renumbered 39 SAR 86 |
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Delivered | 1896 |
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First run | 1896 |
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Withdrawn | 1931 |
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Close
Between 1879 and 1885, the Natal Government Railways placed 37 4-6-0 tank steam locomotives in service, which were later designated Class G. In 1896, one of them was rebuilt to the first known 4-6-4T Baltic type locomotive, later designated Class H. In 1912, when this rebuilt engine was assimilated into the South African Railways, it was renumbered and became its only Class C2 locomotive.[1][2][3][4]