South African Class 6G 4-6-0
| South African Class 6G 4-6-0 ex CGR 6th Class 4-6-0 | |
|---|---|
|
Ex CGR 6th Class no. 263, SAR Class 6G no. 607 | |
| Type and origin | |
| Power type | Steam |
| Designer |
Cape Government Railways Schenectady Locomotive Works |
| Builder | Schenectady Locomotive Works |
| Serial number | 5646-5653 |
| Model | CGR 6th Class |
| Build date | 1901 [1] |
| Total produced | 8 |
| Specifications | |
| Configuration | 4-6-0 "Tenwheeler" |
| Gauge | 3 ft 6 in (1,067 mm) Cape gauge |
| Leading wheel diameter | 28.5 in (724 mm) |
| Driver diameter | 54 in (1,370 mm) |
| Wheelbase |
Total: 44 ft 11.75 in (13.710 m) Engine: 6 ft (1.829 m) bogie 11 ft 4 in (3.454 m) coupled 21 ft 2 in (6.452 m) total Tender: 5 ft (1.524 m) bogie 14 ft 5 in (4.394 m) total |
| Length | 51 ft 5.75 in (15.691 m) |
| Height | 12 ft 8 in (3.861 m) |
| Frame | Bar frame |
| Axle load | 12.75 long tons (13.0 t) on 2nd driver |
| Weight on drivers | 36.525 long tons (37.1 t) |
| Locomotive weight | 48.525 long tons (49.3 t) |
| Tender weight |
35,020 lb (15.9 t) empty 33.1 long tons (33.6 t) w/o |
| Locomotive and tender combined weight | 81.625 long tons (82.9 t) |
| Tender type |
WE – WE, WG permitted * 2 axle bogies * 34 in (864 mm) wheels * Length 20 ft 4.6875 in (6.215 m) |
| Fuel type | Coal |
| Fuel capacity | 5 long tons (5.1 t) |
| Water capacity | 2,800 imp gal (13,000 l) |
| Boiler |
4 ft 11 in (1.499 m) inside dia 11 ft 4.75 in (3.473 m) inside length 6 ft 11 in (2.108 m) pitch |
| Boiler pressure | 180 psi (1,240 kPa) |
| Firegrate area | 19 sq ft (1.765 m2) |
| Heating surface: – Tubes |
195 tubes 2 in (50.8 mm) diameter 1,163.35 sq ft (108.079 m2) |
| – Firebox | 111.7 sq ft (10.377 m2) |
| – Total | 1,275.23 sq ft (118.473 m2) |
| Cylinders | Two |
| Cylinder size |
17.5 in (444 mm) bore 26 in (660 mm) stroke |
| Valve gear | Stephenson |
| Valve travel | 5 in (127 mm) |
| Valve lap | 1 in (25.4 mm) |
| Performance figures | |
| Tractive effort | 19,910 lbf (88.6 kN) at 75% pressure |
| Career | |
| Operator(s) |
Cape Government Railways South African Railways [2][3] |
| Class | CGR 6th Class, SAR Class 6G |
| Number in class | 8 |
| Number(s) |
CGR 262-269 SAR 606-613 [1][4][5] |
| Delivered | 1901 |
| First run | 1901 |
| Withdrawn | 1961 [6] |
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The South African Class 6G 4-6-0 of 1901 is a South African steam locomotive from the pre-Union era in the Cape Colony.
In 1901 eight redesigned 6th Class 4-6-0 steam locomotives were placed in service by the Cape Government Railways. In 1912, when they were assimilated into the South African Railways, they were renumbered and reclassified to Class 6G.[1][4][6]
Manufacturer
The Cape 6th Class locomotive was designed at the Salt River works of the Cape Government Railways (CGR) at the same time as the 7th Class. While the 7th Class was conceived primarily as a goods locomotive, the 6th Class was intended to be its fast passenger service counterpart.[1]
The eight 6th Class locomotives that were placed in service by the CGR in 1901 were designed and built by the Schenectady Locomotive Works to the specifications of the CGR locomotive department and were consequently somewhat different in appearance from previous Cape 6th Class locomotives. While they were also built on bar frames like the previous two 6th Class locomotives, they were slightly larger with larger boilers and with 17.5 inches (444 millimetres) diameter cylinders, compared to the 17 inches (432 millimetres) diameter cylinders of all earlier 6th Class locomotives. Like the two Class 6F locomotives, a visually obvious distinguishing feature was their higher mounted running boards without the need for driving wheel fairings. They were numbered in the range from 262 to 269 and allocated to the Cape Western System.[1][2]
Class 6 sub-classes
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.[4][7]
When these eight locomotives were assimilated into the SAR in 1912, they were renumbered in the range from 606 to 613 and reclassified to Class 6G.[2][4][5]
The rest of the CGR’s 6th Class locomotives, together with 6th Class locomotives that were inherited from the Oranje-Vrijstaat Gouwerment-Spoorwegen (OVGS) via the Imperial Military Railways (IMR) and the Central South African Railways (CSAR), were grouped into thirteen more sub-classes by the SAR. The 4-6-0 locomotives became SAR Classes 6, 6A to 6F, 6H and 6J to 6L, the 2-6-2 locomotives became Class 6Y and the 2-6-4 locomotives became Class 6Z.[2][5]
Service
The Class 6 series of locomotives were introduced primarily as passenger locomotives, but when the class became displaced by larger and more powerful locomotive classes, it literally became a "Jack-of-all-trades" that proved itself as one of the most useful and successful locomotive classes ever to be designed at the Salt River shops. It went on to see service in all parts of the country except Natal and was used on all types of traffic.[1]
The Class 6G remained in service for sixty years and the last one was withdrawn from service at East London in 1961.[6]
Sides illustrated
The main picture and the following show both sides of the Class 6G.
-
.jpg)
Schenectady works picture of the 6th Class
See also
- South African Class 6 4-6-0
- South African Class 6A 4-6-0
- South African Class 6B 4-6-0
- South African Class 6C 4-6-0
- South African Class 6D 4-6-0
- South African Class 6E 4-6-0
- South African Class 6F 4-6-0
- South African Class 6H 4-6-0
- South African Class 6J 4-6-0
- South African Class 6K 4-6-0
- South African Class 6L 4-6-0
- South African Class 6Y 2-6-2
- South African Class 6Z 2-6-4
- The 4-6-0 "Tenwheeler"
- Tender locomotive numbering and classification
- South African locomotive history
- List of South African locomotive classes
References
|
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 Holland, D.F. (1971). Steam Locomotives of the South African Railways, Volume 1: 1859-1910 (1st ed.). Newton Abbott, Devon: David & Charles. pp. 48, 56. ISBN 978-0-7153-5382-0.
- ↑ 2.0 2.1 2.2 2.3 South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, as amended
- ↑ "Schenectady Ten Wheel Locomotives for Cape Government Railways". Railway and Locomotive Engineering – A Practical Journal of Railway Motive Power and Rolling Stock 13 (3): pp. 131–132. March 1901. Retrieved 23 December 2012.
- ↑ 4.0 4.1 4.2 4.3 Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer’s Office, Pretoria, January 1912, pp. 8, 12, 14, 32 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
- ↑ 5.0 5.1 5.2 Holland, D.F. (1972). Steam Locomotives of the South African Railways, Volume 2: 1910-1955 (1st ed.). Newton Abbott, Devon: David & Charles. p. 138. ISBN 978-0-7153-5427-8.
- ↑ 6.0 6.1 6.2 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. p. 43. ISBN 0869772112.
- ↑ The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 25.
