South African Class F 4-6-4T
41 ft 5+3⁄4 in (12,643 mm)
26 in (660 mm) stroke
Performance figures | |
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Tractive effort | 23,410 lbf (104.1 kN) @ 75% |
Career | |
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Operators | Central South African Railways South African Railways |
Class | Class F |
Number in class | 8 |
Numbers | CSAR 260-267, SAR 78-85 |
Nicknames | Chocolate Box |
Delivered | 1904 |
First run | 1904 |
Withdrawn | 1931 |
The South African Railways Class F 4-6-4T of 1904 was a steam locomotive from the pre-Union era in Transvaal Colony.
In 1904, the Central South African Railways placed eight Class F tank steam locomotives with a 4-6-4 Baltic type wheel arrangement in service. In 1912, when these locomotives were assimilated into the South African Railways, they were renumbered but retained their Class F classification.[1][2][3]
Manufacturer
The first two locomotive types to be designed for the Central South African Railways (CSAR) by P.A. Hyde, who had been appointed as Chief Locomotive Superintendent of the CSAR upon its inception on 1 July 1902, were placed in service in 1904. These were the Class 9 Pacific type passenger locomotive and the Class F 4-6-4 Baltic type tank steam locomotive.[1][2]
Orders for these two classes were placed simultaneously with Vulcan Foundry of Newton-le-Willows in England. The eight Class F locomotives were delivered in 1904, numbered in the range from 260 to 267.[1][2]
Characteristics
Since the Class F and the Class 9 were designed and built simultaneously, there were many similarities between them. Apart from the tank locomotive's slightly smaller coupled wheels of 54 inches (1,372 millimetres) diameter compared to 57 inches (1,448 millimetres) on the Class 9, many parts were made interchangeable, including their boilers, cylinders and valve motion. They had bar frames, Stephenson valve gear and used saturated steam.[1][2][4]
The locomotive had electric headlights, powered by a steam turbine and generator which were fitted between the chimney and the headlight on top of the smokebox.[2]
In common with the CSAR's Classes 8 and 9, the Class F suffered from fractures in the bar frames, particularly between the cylinders and the leading coupled wheels. The problem was overcome by fitting 1⁄2 inch (13 millimetres) thick flitch plates on each side of the frame at this point.[2]
Renumbering
When the Union of South Africa was established on 31 May 1910, the three Colonial government railways (Cape Government Railways, Natal Government Railways and CSAR) were united under a single administration to control and administer the railways, ports and harbours of the Union. Although the South African Railways and Harbours came into existence in 1910, the actual classification and renumbering of all the rolling stock of the three constituent railways were only implemented with effect from 1 January 1912.[3][5]
In 1912, these locomotives retained their Class F designation, but were renumbered in the range from 78 to 85.[3][4][6]
Service
At the time when the Class F locomotives were ordered, the suburban services on the Reef were being worked by 46 Tonner Class B tank locomotives which had been inherited from the Nederlandsche-Zuid-Afrikaansche Spoorweg-Maatschappij (NZASM) via the Imperial Military Railways (IMR). Since the loads were fast becoming too heavy for them, the Class F was designed and ordered as a replacement, intended for the suburban passenger services between Springs and Randfontein.[1][4]
Hyde considered the Class F and the Class 9 as two of his most successful designs for the CSAR. The tank locomotives were very attractive in appearance, with double red lining on their black livery. The IMR tradition of polished copper-capped chimneys, brass domes and boiler bands was continued on the CSAR. The locomotives were always maintained in immaculate condition while in service and became affectionately known as the Chocolate Boxes.[1][4]
The last of the Class F was withdrawn from service by 1931.[4]
Illustration
The main picture is a Vulcan Foundry builder's photograph of Class F no. 260. The following pictures show the locomotive in service.
- CSAR Class F no. 266, SAR no. 84, on a suburban, c. 1910
- SAR Class F no. 81, as depicted on a SAR Museum Playing Card
References
- ^ a b c d e f Holland, D.F. (1971). Steam Locomotives of the South African Railways. Vol. 1: 1859–1910 (1st ed.). Newton Abbott, England: David & Charles. pp. 127–129. ISBN 978-0-7153-5382-0.
- ^ a b c d e f Espitalier, T.J.; Day, W.A.J. (1945). The Locomotive in South Africa - A Brief History of Railway Development. Chapter VI - Imperial Military Railways and C.S.A.R. (Continued). South African Railways and Harbours Magazine, January 1945. pp. 14-15.
- ^ a b c Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer's Office, Pretoria, January 1912, pp. 7, 11, 13, 19-20 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
- ^ a b c d e Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. p. 30. ISBN 0869772112.
- ^ The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 25.
- ^ Holland, D. F. (1972). Steam Locomotives of the South African Railways. Vol. 2: 1910-1955 (1st ed.). Newton Abbott, England: David & Charles. p. 136. ISBN 978-0-7153-5427-8.
- v
- t
- e
- CSAR 0-6-0ST 1896
- CSAR 4-6-0T 1887
- CSAR Class 6-L1
- CSAR Class 6-L2
- CSAR Class 6-L3
- CSAR Class 7
- CSAR Class 8-L1
- CSAR Class 8-L2
- CSAR Class 8-L3
- CSAR Class 9
- CSAR Class 10 1904
- CSAR Class 10 1910
- CSAR Class 10-2 Saturated
- CSAR Class 10-2 Superheated
- CSAR Class 10-C
- CSAR Class 11
- CSAR Class B 0-6-4T
- CSAR Class C 2-8-4T
- CSAR Class D
- CSAR Class E 4-8-0TT
- CSAR Class E 4-8-2T
- CSAR Class E 4-10-2T
- CSAR Class F
- CSAR Class M
- CSAR Mallet Saturated
- CSAR Mallet Stoker
- CSAR Mallet Superheated
- CSAR Rack 4-6-4RT
- CSAR Railmotor
- IMR 0-6-0ST 1896
- IMR 4-6-0T 1887
- IMR 46 Tonner 0-6-4T
- IMR 55 Tonner 2-6-4T
- IMR 7th Class 4-8-0
- IMR 8th Class 4-8-0
- IMR Reid Tenwheeler 4-10-2T
- IMR Western Australian 2-8-4T
- NZASM 10 Tonner
- NZASM 13 Tonner
- NZASM 14 Tonner
- NZASM 18 Tonner
- NZASM 19 Tonner
- NZASM 32 Tonner
- NZASM 40 Tonner
- NZASM 46 Tonner
- OVGS 1st Class 4-4-0TT
- OVGS 2nd Class 2-6-0
- OVGS 2nd Class 2-6-0ST
- OVGS 3rd Class 4-4-0
- OVGS 4th Class G 4-6-0
- OVGS 5th Class K 4-6-0 1890
- OVGS 5th Class K 4-6-0 1891
- OVGS 6th Class L 4-6-0
- OVGS 6th Class L2 4-6-0
- OVGS 6th Class L3 4-6-0
- PPR 0-4-0ST Natal
- PPR 26 Tonner
- PPR 35 Tonner Portuguese
- PPR 55 Tonner
- CSAR Pankop