South African Class 7E 4-8-0

This article is about one of two different New Cape Central Railway locomotive types to be designated "7th Class". For the other NCCR 7th Class locomotive, see South African Class 7F 4-8-0.
This article is about the South African steam locomotive. For the electric locomotive, see South African Class 7E.
NCCR 7th Class 4-8-0 1899
South African Class 7E 4-8-0

New Cape Central Railway no. 4
South African Railways no. 1347
Type and origin
♠ - Original locomotive, as built
♣ - Original locomotive with adjusted boiler pressure
- Locomotive equipped with superheating
Power type Steam
Designer Cape Government Railways
(H.M. Beatty)
Builder Neilson, Reid and Company
North British Locomotive Company
Serial number Neilson, Reid 5653, 5702-5704
NBL 15903, 15904 & 16348
Model CGR 7th Class
Build date 1899-1904
Total produced 7
Specifications
Configuration 4-8-0 (Mastodon)
Driver 2nd coupled axle
Gauge 3 ft 6 in (1,067 mm) Cape gauge
Leading dia 28 12 in (724 mm)
Coupled dia 42 34 in (1,086 mm)
Tender wheels33 12 in (851 mm)
34 in (864 mm)
Wheelbase 46 ft 2 in (14,072 mm)
  Engine 21 ft 3 12 in (6,490 mm)
  Leading 5 ft 3 in (1,600 mm)
  Coupled 12 ft (3,658 mm)
  Tender 16 ft 1 in (4,902 mm)
  Tender bogie 4 ft 7 in (1,397 mm)
Length:
  Over couplers 53 ft 5 in (16,281 mm)
Height 12 ft 10 in (3,912 mm)
Frame type Plate
Axle load ♠ 9 LT (9,144 kg)
9 LT 14 cwt (9,856 kg)
  Leading ♠ 10 LT 14 cwt (10,870 kg)
11 LT 2 cwt (11,280 kg)
  1st coupled ♠ 9 LT (9,144 kg)
9 LT 8 cwt (9,551 kg)
  2nd coupled ♠ 9 LT (9,144 kg)
9 LT 14 cwt (9,856 kg)
  3rd coupled ♠ 8 LT 18 cwt (9,043 kg)
9 LT 10 cwt (9,652 kg)
  4th coupled ♠ 8 LT 18 cwt (9,043 kg)
9 LT 8 cwt (9,551 kg)
  Tender bogieBogie 1: 17 LT 8 cwt (17,680 kg)
Bogie 2: 18 LT 2 cwt (18,390 kg)
Adhesive weight ♠ 35 LT 16 cwt (36,370 kg)
38 LT (38,610 kg)
Loco weight ♠ 46 LT 10 cwt (47,250 kg)
49 LT (49.79 t)
Tender weight ♠ 38,960 lb (17,670 kg) empty
35 LT 10 cwt (36,070 kg) w/o
Loco & tender weight ♠ 95,312 lb (43,233 kg) empty
82 LT (83,320 kg) w/o
Tender type ZC (2 axle bogies)
ZA, ZB, ZC, ZE permitted
Fuel type Coal
Fuel capacity ♠ 6 LT 10 cwt (6.6 t)
8 LT (8.1 t)
Water cap ♠ 2,600 imp gal (12,000 l; 3,100 US gal)
2,850 imp gal (13,000 l; 3,420 US gal)
Firebox type Round-top
  Firegrate area ♠ 17.5 sq ft (1.63 m2)
18 sq ft (1.7 m2)
Boiler:
  Pitch ♠ 6 ft 8 in (2,032 mm)}
6 ft 10 in (2,083 mm)
  Diameter ♠ 4 ft 4 in (1,321 mm)}
4 ft 6 in (1,372 mm)
  Tube plates 10 ft 9 in (3,277 mm)}
  Small tubes185: 1 78 in (48 mm)
100: 1 78 in (48 mm)
  large tubes 18: 5 12 in (140 mm)
Boiler pressure ♠ 160 psi (1,100 kPa)
♣ 170 psi (1,200 kPa)
180 psi (1,200 kPa)
Safety valve Ramsbottom
Heating surface ♠ 1,078 sq ft (100.1 m2)
919 sq ft (85.4 m2)
  Tubes ♠ 976 sq ft (90.7 m2)
806 sq ft (74.9 m2)
  Firebox ♠ 102 sq ft (9.5 m2)
113 sq ft (10.498 m2)
Superheater:
  Heating area
206 sq ft (19.1 m2)
Cylinders Two
Cylinder size 17 in (432 mm) bore
23 in (584 mm) stroke
Valve gear Stephenson
Couplers Bell link-and-pin
Performance figures
Tractive effort ♠ 18,660 lbf (83.0 kN) @ 75%
♣ 19,810 lbf (88.1 kN) @ 75%
22,240 lbf (98.9 kN) @ 75%
Factor of adh 4.3
Career
Operators New Cape Central Railway
South African Railways
Class NCCR 7th Class, SAR Class 7E
Number in class 7
Numbers NCCR 1-7, SAR 1344-1350
Delivered 1899-1904
First run 1899
The leading coupled axle had flangeless wheels

The South African Railways Class 7E 4-8-0 of 1899 is a steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1899, the New Cape Central Railway placed one Cape 7th Class 4-8-0 Mastodon steam locomotive in service. Another three were commissioned in 1900, two more in 1903 and another one in 1904. In 1925, when the New Cape Central Railway was amalgamated into the South African Railways, these seven locomotives were renumbered and reclassified to Class 7E.[1][2][3]

New Cape Central Railway

The New Cape Central Railway (NCCR) was formed in January 1893, when it purchased all the assets of the bankrupted Cape Central Railway (CCR), which had constructed a line from Worcester via Robertson to Roodewal, now Ashton. In 1894, the NCCR began work to extend the line to Swellendam. From there, it continued via Heidelberg to Riversdale, which was reached on 3 December 1903.[1][2]

The line was originally laid with 46 12 pounds per yard (23.1 kilograms per metre) rail. When Voorbaai, near Mosselbaai, was reached in 1904, 211 miles (340 kilometres) from Worcester, it made the NCCR the longest private railway in South Africa.[1][2][4]

Manufacturers

The NCCR acquired its first seven Cape 7th Class locomotives piecemeal over a period of five years. The first locomotive, NCCR no. 1, was ordered from Neilson, Reid and Company in 1899, followed by three more from the same manufacturer in 1900, numbered in the range from 2 to 4. The original Cape 7th Class had been designed in 1892 by H.M. Beatty, at the time the Cape Government Railways (Western System) Locomotive Superintendent.[1][2][3][5]

H.M. Beatty

Two more were ordered from Neilson, Reid in 1903, numbered 5 and 6, but since three Scottish locomotive builders, Dübs and Company, Neilson, Reid and Sharp, Stewart and Company, merged into the North British Locomotive Company (NBL) while the locomotives were being built, they were delivered as having been built by the newly established NBL at the Hyde Park works of the former Neilson, Reid.[1][2][3][6][7]

The seventh 7th Class locomotive, no. 7, was acquired in 1904, also built by NBL. On the NBL works list, this locomotive is shown as actually having been built for Pauling and Company, the contractors who constructed the line.[1][2][3][6][7]

Class 7 sub-classes

In 1925, the NCCR was amalgamated into the South African Railways (SAR) and these seven 7th Class locomotives were taken onto the SAR roster, reclassified to Class 7E and numbered in the range from 1344 to 1350.[1][3]

Other 7th Class locomotives which had come onto the SAR roster from the Colonial railways in the Southern African region in 1912, namely the Cape Government Railways (CGR), Central South African Railways (CSAR), the Natal Government Railways (NGR) and the Rhodesia Railways (RR), as well as more 7th Class locomotives which were acquired by the NCCR in 1913, were grouped into six different sub-classes by the SAR, becoming SAR Classes 7, 7A to 7D and 7F.[8]

The Class 7E builders, year built, works numbers and renumbering are listed in the table.[5][6][7]

Service

In SAR service, the Class 7 family served on every system in the country. They remained in branchline service, particularly at Tarkastad and Ladysmith and also on the Touws River-Ladismith branchline, until they were finally withdrawn in 1972.[3]

References

  1. 1 2 3 4 5 6 7 Holland, D.F. (1971). Steam Locomotives of the South African Railways, Volume 1: 1859-1910 (1st ed.). Newton Abbott, Devon: David & Charles. p. 78. ISBN 978-0-7153-5382-0.
  2. 1 2 3 4 5 6 Pattison, R.G. (1997). The Cape Seventh Class Locomotives (1st ed.). Kenilworth, Cape Town: The Railway History Group. pp. 10, 15. ISBN 0958400946.
  3. 1 2 3 4 5 6 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 46–48. ISBN 0869772112.
  4. Espitalier, T.J.; Day, W.A.J. (1944). The Locomotive in South Africa - A Brief History of Railway Development. Chapter II - The Cape Government Railways (Continued). South African Railways and Harbours Magazine, April 1944. pp. 253-257.
  5. 1 2 Neilson, Reid works list, compiled by Austrian locomotive historian Bernhard Schmeiser
  6. 1 2 3 North British Locomotive Company works list, compiled by Austrian locomotive historian Bernhard Schmeiser
  7. 1 2 3 North British Locomotive Co. (from J. Lambert)
  8. South African Railways and Harbours Locomotive Diagram Book, 2’0” & 3’6” Gauge Steam Locomotives, 15 August 1941, as amended
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