This article is about one of two different Natal Government Railways locomotive types to be designated "Class C". For the other, see
South African Class H 4-10-2T.
NGR Class C 4-8-2T
South African Class H2 4-8-2T |
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Class H2 no. 329 at Masons Mill, 29 March 1979
Ex NGR Class C 4-10-2T no. 157
Ex SAR Class H 4-10-2T no. 240 |
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| Specifications |
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Configuration:
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| • Whyte | 4-8-2T (Mountain) |
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| • UIC | 2'D1'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 (650 mm) |
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| Coupled dia. | 45 in (1,100 mm) |
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| Trailing dia. | 25+3⁄4 in (650 mm) |
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| Minimum curve | 300 ft (91 m) radius |
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| Wheelbase | 30 ft 6 in (9,296 mm) |
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| • Leading | 5 ft 4 in (1,626 mm) |
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| • Coupled | 12 ft 6 in (3,810 mm) |
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Length:
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| • Over couplers | 37 ft 6 in (11,430 mm) |
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| Height | 12 ft 6 in (3,810 mm) |
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| Axle load | 13 LT (13,210 kg) |
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| • Leading | 10 LT 4 cwt 2 qtr (10,390 kg) |
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| • Coupled | 13 LT (13,210 kg) |
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| • Trailing | 6 LT (6,096 kg) |
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| Adhesive weight | 52 LT (52,830 kg) |
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| Loco weight | 68 LT (69,090 kg) |
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| Fuel type | Coal |
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| Fuel capacity | 4 LT (4.1 t) |
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| Water cap. | 1,880 imp gal (8,550 L) |
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| Firebox: | |
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| • Type | Round-top |
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| • Grate area | 21 sq ft (2.0 m2) |
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Boiler:
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| • Pitch | 6 ft 10 in (2,083 mm) |
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| • Diameter | 4 ft 7+7⁄8 in (1,419 mm) |
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| • Tube plates | 10 ft 4 in (3,150 mm) |
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| • Small tubes | 287: 1+3⁄4 in (44 mm) |
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| Boiler pressure | 175 psi (1,207 kPa) |
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| Safety valve | Ramsbottom |
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| Heating surface: | |
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| • Firebox | 135 sq ft (12.5 m2) |
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| • Tubes | 1,359 sq ft (126.3 m2) |
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| • Total surface | 1,494 sq ft (138.8 m2) |
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| Cylinders | Two |
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| Cylinder size | 19 in (483 mm) bore
27 in (686 mm) stroke |
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| Valve gear | Allan |
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| Couplers | Johnston link-and-pin
AAR knuckle (1930s) |
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| Career |
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| Operators | Natal Government Railways
South African Railways |
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| Class | NGR Class C, SAR Class H2 |
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| Number in class | 8 |
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| Numbers | NGR 170, 173, 175, 217 & 240
SAR 227-231, 329-331 |
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| Delivered | c. 1909-1912 |
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| First run | 1909 |
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| Withdrawn | 1977 |
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| The leading coupled axle had flangeless wheels |
The South African Railways Class H2 4-8-2T of 1909 was a steam locomotive from the pre-Union era in the Colony of Natal.
Between 1899 and 1903, the Natal Government Railways placed 101 4-10-2 tank steam locomotives in service. By 1910, five of them had been converted to a 4-8-2T wheel arrangement and in 1912, when the South African Railways classification and renumbering of locomotives took place, these five were designated Class H2.
