South African Class Exp 4 2-8-2

South African Class Exp 4 2-8-2 ex CGR 9th Class 2-8-2
CGR 9th Class 806, c. 1911 SAR Class Experimental 4 911
Type and origin
Power type	Steam
Designer	Cape Government Railways
Builder	Kitson and Company
Serial number	4195-4196 ^[1]
Model	CGR 9th Class ^[2]^[3]
Build date	1903
Total produced	2
Specifications
Configuration	2-8-2 "Mikado"
Gauge	3 ft 6 in (1,067 mm) Cape gauge
Leading wheel diameter	28.5 in (724 mm)
Driver diameter	48 in (1,220 mm)
Trailing wheel diameter	33 in (838 mm)
Wheelbase	Total: 50 ft 7.25 in (15.424 m) Engine: 13 ft 1 in (3.988 m) coupled 26 ft 9 in (8.153 m) total Tender: 4 ft 7 in (1.397 m) bogie 14 ft 7 in (4.445 m) total
Height	12 ft 10 in (3.912 m)
Frame	Bar frame
Axle load	12.8 long tons (13.0 t) on 4th driver
Weight on drivers	48.9 long tons (49.7 t)
Locomotive weight	64.35 long tons (65.4 t)
Tender weight	36.9 long tons (37.5 t)
Locomotive and tender combined weight	101.25 long tons (102.9 t)
Tender type	2 axle bogies 34 in (864 mm) wheels
Fuel type	Coal
Fuel capacity	6 long tons (6.1 t)
Water capacity	2,855 imp gal (12,980 l)
Boiler	4 ft 10.75 in (1.492 m) inside diameter 14 ft 10.125 in (4.524 m) inside length 7 ft 1 in (2.159 m) pitch
Boiler pressure	180 psi (1,240 kPa)
Firegrate area	26.75 sq ft (2.485 m²)
Heating surface: – Tubes	159 tubes 2.25 in (57.1 mm) diameter 1,391 sq ft (129.228 m²)
– Firebox	117.3 sq ft (10.898 m²)
– Total	1,508.3 sq ft (140.126 m²)
Cylinders	Two
Cylinder size	19 in (483 mm) bore 24 in (610 mm) stroke
Valve gear	Stephenson
Performance figures
Tractive effort	24,370 lbf (108 kN) at 75% pressure
Career
Operator(s)	Cape Government Railways South African Railways ^[1]
Class	CGR 9th Class SAR Class Exp 4 ^[2]^[3]
Number in class	2
Number(s)	CGR 805-806, SAR 910-911 ^[2]^[3]
Delivered	1903
First run	1903
Withdrawn	1930

The South African Class Experimental 4 2-8-2 of 1903 is a South African steam locomotive from the pre-Union era in the Cape Colony.

In 1903 the Cape Government Railways placed two 9th Class steam locomotives with a 2-8-2 Mikado type wheel arrangement in service. In 1912, when they were assimilated into the South African Railways, they were renumbered and designated Class Experimental 4.^[1]^[2]^[4]

Manufacturer

The Cape 9th Class locomotive was designed by H.M. Beatty, the Locomotive Superintendent of the Cape Government Railways (CGR) from 1896 to 1910. They were the first South African locomotives to have a 2-8-2 Mikado wheel arrangement and they were built with bar frames, had Stephenson’s link motion valve gear and used saturated steam. Two locomotives were delivered by Kitson and Company in 1903, numbered 805 and 806.^[1]^[2]^[4]

Characteristics

With these locomotives, Beatty attempted to combine the best design features and good qualities of his Cape 8th Class 2-8-0 locomotive of 1901 with the improved steaming that was obtained from a wide firegrate. In many respects they were enlarged versions of the two Cape 6th Class 2-6-2 locomotives that were delivered by Kitson in that same year, with many features in common.^[1]

Performance

In comparison with the Cape 8th Class, however, it was found that their maintenance costs were much higher, without any advantage in terms of efficiency. As a result, no more of the type were ordered.^[1]^[4]

Service

They were placed in service on the mainline between De Aar and Kimberley.^[1]^[4]

The Union of South Africa was established on 31 May 1910, in terms of the South Africa Act. One of the clauses in the Act required that the three Colonial Government railways, the CGR, the Natal Government Railways and the Central South African Railways, also be united under one single administration to control and administer the railways, ports and harbours of the Union. While the South African Railways (SAR) came into existence in 1910, the actual classification and renumbering of all the rolling stock of the three constituent railways required careful planning and was only implemented with effect from 1 January 1912.^[2]^[5]

In 1912 they were reclassified as Class Experimental 4 and renumbered to 910 and 911 on the SAR. They were withdrawn from service and scrapped in 1930.^[1]^[2]^[4]

References

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South African Class Exp 4 (2-8-2)

↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 Holland, D.F. (1971). Steam Locomotives of the South African Railways, Volume 1: 1859-1910 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 68–69. ISBN 978-0-7153-5382-0.
↑ 2.0 2.1 2.2 2.3 2.4 2.5 2.6 Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer’s Office, Pretoria, January 1912, pp. 9, 12, 15, 36 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
↑ 3.0 3.1 3.2 Holland, D.F. (1972). Steam Locomotives of the South African Railways, Volume 2: 1910-1955 (1st ed.). Newton Abbott, Devon: David & Charles. p. 140. ISBN 978-0-7153-5427-8.
↑ 4.0 4.1 4.2 4.3 4.4 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. p. 83. ISBN 0869772112.
↑ The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 25.

Locomotives of South Africa

Steam

Brunel gauge	HBEL 0-4-0 HBTB 0-4-0T HBTB 0-4-0WT HBTB 0-4-0ST

Broad gauge	CGR Aid CGR Blackie CGR 0-4-2 CGR 2-4-0T NRC Durban NRC Natal NRC Perseverance

Cape gauge Tank	CGR Coffee Pot CGR 040 1873 CGR 040 1874 CGR 060 1876 CGR 060 1902 CGR 260 1900 CGR 260 1902 CGR 1st 040 1875 CGR 1st 440 1875 CGR 1st 040 1876 CGR 1st 260 1876 CGR 2nd 1882 CGR 3rd 1900 CGR RM CSAR C CSAR E CSAR Rack CSAR RM Dbn Congella Dbn Edward Innes Dbn John Milne Dbn Sir Albert HBPE 040 Kowie 060 Kowie 440 M&S 462 NGR Dbn & Pmb NGR I 262 NGR K 040 NGR K 060 NGR K 260 NZASM 10T NZASM 14T NZASM 18T NZASM 19T NZASM 32T NZASM 40T PPR 26T PPR 35T SAR RM SAR 0-4-0ST SAR 040 69 SAR A SAR B SAR C SAR C1 SAR C2 SAR D SAR E SAR F SAR G SAR H SAR H1 SAR H2 SAR J SAR K SWA 2-8-0T

Cape gauge Tender	CGR 1st 260 1876 BP CGR 1st 260 1876 K CGR 1st 260 1879 CGR 1st 440 1879 CGR 1st 1881 CGR 1st 1891 CGR 2nd 1875 CGR 3rd 1883 CGR 3rd 1884 CGR 3rd 1889 CGR 3rd 1898 CGR 3rd 1901 CGR 3rd 1903 CGR 4th 1880 CGR 4th 1882 CGR 4th 1884 CGR 4th 1897 CGR 5th 1890 CGR 5th 1891 NGR Havelock NGR I 260 Exp-1 Exp-2 Exp-3 Exp-4 Exp-5 Exp-6 SAR S SAR S1 SAR S2 SAR 1 SAR 1A SAR 1B SAR 2 SAR 2C SAR 3 SAR 3A SAR 3B SAR 4 SAR 4A SAR 5 SAR 5A SAR 5B SAR 6 SAR 6A SAR 6B SAR 6C SAR 6D SAR 6E SAR 6F SAR 6G SAR 6H SAR 6J SAR 6K SAR 6L SAR 6Y SAR 6Z SAR 7 SAR 7A SAR 7B SAR 7C SAR 7D SAR 7E SAR 7F SAR 8 SAR 8A SAR 8B SAR 8C SAR 8D SAR 8E SAR 8F SAR 8X SAR 8Y SAR 8Z SAR 9 SAR 10 SAR 10A SAR 10B SAR 10C SAR 10D SAR 11 SAR 12 SAR 12A SAR 12B SAR 13 SAR 14 SAR 14A SAR 14B SAR 14C SAR 15 SAR 15A SAR 15B SAR 15C SAR 15CA SAR 15E SAR 15F SAR 16 SAR 16A SAR 16B SAR 16C SAR 16D SAR 16DA SAR 16E SAR 17 SAR 18 SAR 19 SAR 19A SAR 19B SAR 19C SAR 19D SAR 20 SAR 21 SAR 23 SAR 24 SAR 25 SAR 25NC SAR 26 SWA 2-8-0

Cape gauge Articulated	CGR Fairlie CGR Kitson-Meyer SAR FC SAR FD SAR GA SAR GB SAR GC SAR GCA SAR GD SAR GDA SAR GE SAR GEA SAR GF SAR GG SAR GH SAR GK SAR GL SAR GM SAR GMA SAR GO SAR HF SAR KM SAR MA SAR MB SAR MC SAR MC1 SAR MD SAR ME SAR MF SAR MG SAR MH SAR MJ SAR MJ1 SAR U

2ft 6in gauge	CCC 1871 CCC Britannia CCC Caledonia CCC Clara CCC Condenser CCC Scotia NCC Pioneer

2ft & 600mm gauges	ACR NG-G16A CGR NG 060 CGR NG 462 CGR A CGR C NGR N SAR 040 1899 SAR NG1 SAR NG2 SAR NG3 SAR NG4 SAR NG5 SAR NG6 SAR NG7 SAR NG8 SAR NG9 SAR NG10 SAR NG-G11 SAR NG-G12 SAR NG-G13 SAR NG-G14 SAR NG15 SAR NG-G16 SWA Ha SWA Hb SWA Hc SWA Hd SWA Jung SWA Zwillinge

Diesel

-electric	SAR DS SAR DS1 SAR 31-000 SAR 32-000 SAR 32-200 SAR 33-000 SAR 33-200 SAR 33-400 SAR 34-000 SAR 34-200 SAR 34-400 SAR 34-500 SAR 34-600 SAR 34-800 SAR 34-900 SAR 35-000 SAR 35-200 SAR 35-400 SAR 35-600 SAR 36-000 SAR 36-200 SAR 37-000 SN 39-000 TFR 39-200 TFR 43-000 SAR 91-000 Afro4000

-hydraulic	SAR 61-000

Electro-diesel

SN 38-000

Electric