South African Class NG8 4-6-0

CGR Type B 4-6-0
South African Class NG8 4-6-0

Bagnall works photograph, c. 1903

Type and origin
Power type	Steam
Designer	W.G. Bagnall
Builder	W.G. Bagnall Kerr, Stuart and Company
Serial number	Bagnall 1741-1746, 1967 Kerr, Stuart 1345-1346
Model	CGR Type B
Build date	Bagnall 1904 & 1914 Kerr, Stuart 1914
Total produced	9

Specifications
Configuration	4-6-0 (Tenwheeler)
Driver	2nd coupled axle
Gauge	2 ft (610 mm) narrow
Coupled dia.	838 mm (33.0 in)
Wheelbase: • Engine	3,988 mm (13 ft 1.0 in)
• Coupled	1,905 mm (6 ft 3.0 in)
Length:
• Over couplers	13,535 mm (44 ft 4.9 in)
Frame type	Bar
Axle load	5,700 kg (12,600 lb)
• Coupled	5,700 kg (12,600 lb)
Adhesive weight	17,000 kg (37,000 lb)
Loco weight	20,600 kg (45,400 lb)
Tender weight	21,100 kg (46,500 lb)
Total weight	41,700 kg (91,900 lb)
Tender type	2-axle bogies
Fuel type	Coal
Firebox type	Round-top
• Firegrate area	0.71 m² (7.6 sq ft)
Boiler pressure	180 psi (1,241 kPa)
Heating surface	39.14 m² (421.3 sq ft)
• Tubes	35.38 m² (380.8 sq ft)
• Firebox	3.76 m² (40.5 sq ft)
Cylinders	Two
Cylinder size	11 ³⁄₄ in (298 mm) bore 16 in (406 mm) stroke
Valve gear	Stephenson
Loco brake	Vacuum
Couplers	Bell lift-hook

Performance figures
Tractive effort	9,032 lbf (40.18 kN) @ 75%

Career
Operators	Cape Government Railways South African Railways
Class	CGR Type B, Improved B SAR Class NG8
Number in class	9
Numbers	CGR 33-38 SAR NG27-NG32, NG36-NG38
Delivered	1904 & 1914
First run	1904
Withdrawn	1931

The South African Railways Class NG8 4-6-0 of 1904 was a narrow gauge steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1904, the Cape Government Railways placed six Type B 4-6-0 steam locomotives in service on the Avontuur 2 feet (610 millimetres) narrow gauge line in the Langkloof. In 1912, when these locomotives were assimilated into the South African Railways, they were renumbered, with an "NG" prefix to their new numbers.^[1]^[2]^[3]

A further three "Improved B" locomotives were placed in service by the South African Railways in 1914. When a system of grouping narrow gauge locomotives into classes was eventually introduced somewhere between 1928 and 1930, they were all to be classified as Class NG8, but had already been withdrawn from service.^[1]

Manufacturer

The Cape Government Railways (CGR) ordered six narrow gauge locomotives with a 4-6-0 wheel arrangement and eight-wheeled bogie tenders from W. G. Bagnall in 1903. They were dispatched from the factory between May and August 1904 and, when they entered service later in the same year, were classified as Type B by the CGR.^[1]^[2]^[3]^[4]

Characteristics

The design of the locomotive was based on the Baldwin-built 2-6-0 locomotives which had been acquired for use on the Hopefield line in 1902. Although the Type B locomotives were built by a British company, they had the same typically American construction and appearance as the Baldwin locomotives. The order initially specified the same 2-6-0 wheel arrangement, but experience with the three Hopefield locomotives led to the decision to alter the design specifications to 4-6-0. They had bar frames, copper fireboxes and used Stephenson valve gear.^[1]

It was claimed that these locomotives could attain a speed of 30 miles per hour (48 kilometres per hour) on the level and haul a load of 100 long tons (100 tonnes) up a 1 in 40 (2½%) grade.^[2]

Numbering

The Bagnall works list show these first six locomotives as numbered from no. 1 to no. 6, but this is possibly incorrect, since numbers 1 to 4 had, at the time, already been allocated to the CGR's Baldwin 2-6-0 locomotives of 1902, which worked on the Hopefield line.^[4]

While it is possible that a separate numbering scheme, also beginning at no. 1, was contemplated for the Avontuur line, the railway renumbering lists of 1910 show these locomotives as numbered in the range from 33 to 38.^[3]

Service

Cape Government Railways

The locomotives were all placed in service on the Langkloof line between Port Elizabeth and Avontuur and became the mainstay of motive power on the Avontuur branch.^[1]

South African Railways

When the Union of South Africa was established on 31 May 1910, the three Colonial government railways (CGR, Natal Government Railways and Central South African Railways) 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 required careful planning and was only implemented with effect from 1 January 1912.^[3]^[5]

In 1912, the narrow gauge locomotives were included in the South African Railways (SAR) renumbering scheme and were allocated new engine numbers with an "NG" prefix, but they were not arranged in locomotive classes. The six Type B locomotives were allocated SAR numbers NG27 to NG32.^[3]

A further three locomotives, with slightly longer boilers, were ordered by the SAR in 1913. The first one of these was also built by Bagnall and delivered in 1914, numbered NG36. The other two were built by Kerr, Stuart and Company. They were dispatched from the builders in September 1914 and numbered NG37 and NG38. These three locomotives were commonly referred to as the Improved B.^[1]^[6]^[7]

Although these engines worked mainly in the Langkloof, some assisted on the Kalbaskraal branch to Saldanha and, judging from photographs, possibly in Natal as well.^[1]

First World War

In 1915, shortly after the outbreak of the First World War, the German South West Africa colony was occupied by the Union Defence Forces. Since a large part of the territory's railway infrastructure and rolling stock was destroyed or damaged by retreating German forces, an urgent need arose for locomotives for use on the narrow gauge lines in that territory. In 1917, numbers NG28, NG30, NG31, NG32, NG36 and NG37 were transferred to the Defence Department for service in South West Africa. All six are believed to have returned to South Africa after the war.^[1]^[8]

Narrow gauge classification

With one exception, the nine locomotives were all withdrawn from service by 1931 and scrapped. No. NG27 was sold to the Eastern Province Cement Company and employed to haul limestone on its industrial line from New Brighton in Port Elizabeth, which linked up with the Avontuur branch at Chelsea Junction.^[1]

A system of grouping narrow gauge locomotives into classes was only adopted at some time between 1928 and 1930. However, these locomotives did not survive in service long enough to become the Class NG8, which had apparently been reserved for them when the classification system was being planned.^[1]

References

1 2 3 4 5 6 7 8 9 10 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 104, 113, 156. ISBN 0869772112.
1 2 3 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.
1 2 3 4 5 Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer's Office, Pretoria, January 1912, pp. 12, 16, 47 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
1 2 Baker, Allan C.; Civil, T. D. Allen (1984). Bagnalls of Stafford – Locomotive Works List (1st ed.). England: The Industrial Locomotive Society
↑ The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 25.
↑ Jux, Frank (1991). Kerr Stuart & Co. Ld. – Locomotive Works List (1st ed.). England: Frank Jux.
↑ Plant, K.P. (1971). Kerr Stuarts for South Africa. The Industrial Railway Record, No. 37, June 1971. pp. 78-85.
↑ Espitalier, T.J.; Day, W.A.J. (1947). The Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued). South African Railways and Harbours Magazine, December 1947. p. 1033.

Wikimedia Commons has media related to South African Class NG8 (4-6-0).

Locomotives of the Cape of Good Hope

7' ¼" gauge	East London 0-4-0VB Table Bay 0-4-0ST Table Bay 0-4-0T Table Bay 0-4-0WT

4' 8½" gauge	Cape 0-4-0T Cape 0-4-2 Cape 2-4-0T CGR 0-4-0ST Aid

3' 6" gauge	CGR 0-4-0ST 1873 CGR 0-4-0ST 1874 CGR 0-4-0ST 1881 CGR 0-4-0ST 1881 Coffee Pot CGR 0-6-0ST CGR 0-6-0T CGR 2-6-0ST 1900 CGR 2-6-0ST 1902 CGR 1st Class 0-4-0ST 1875 CGR 1st Class 0-4-0ST 1876 CGR 1st Class 2-6-0 1876 BP CGR 1st Class 2-6-0 1876 Kitson CGR 1st Class 2-6-0 1879 CGR 1st Class 2-6-0 1891 CGR 1st Class 2-6-0ST CGR 1st Class 4-4-0 CGR 1st Class 4-4-0T CGR 1st Class 4-4-0TT CGR 2nd Class 2-6-2TT CGR 2nd Class 4-4-0T CGR 3rd Class 2-6-0T CGR 3rd Class 4-4-0 1883 CGR 3rd Class 4-4-0 1884 CGR 3rd Class 4-4-0 1889 CGR 3rd Class 4-4-0 1898 CGR 3rd Class 4-4-0 1901 CGR 3rd Class 4-4-0 1903 CGR 4th Class 4-4-2 CGR 4th Class 4-6-0TT 1880 CGR 4th Class 4-6-0TT 1882 CGR 4th Class 4-6-0TT 1882 Joy CGR 4th Class 4-6-0TT 1884 CGR 5th Class 1890 CGR 5th Class 1891 CGR 6th Class 1893 CGR 6th Class 1896 CGR 6th Class 1897 CGR 6th Class 1898 CGR 6th Class 1900 CGR 6th Class 1901 Baldwin CGR 6th Class 1901 Schenectady CGR 6th Class 1901 Neilson's CGR 6th Class 1902 CGR 6th Class 1904 CGR 6th Class 2-6-2 CGR 6th Class 2-6-4 CGR 7th Class 1892 CGR 7th Class 1896 CGR 7th Class 1902 CGR 8th Class 1901 CGR 8th Class 1902 CGR 8th Class 2-8-0 1903 CGR 8th Class 4-8-0 1903 CGR 8th Class 4-8-0 1903 Exp CGR 8th Class 2-8-0 1904 CGR 8th Class 4-8-0 1904 CGR 9th Class 1903 CGR 9th Class 1906 CGR 10th Class CGR Fairlie CGR Karoo 1903 CGR Karoo 1904 CGR Karoo Compound CGR Kitson-Meyer CGR Mountain 4-8-2 CGR Railmotor CGR Tandem Compound 1902 CGR Tandem Compound 1903 Kowie Railway 0-6-0T Kowie Railway 4-4-0T Metropolitan & Suburban 4-6-2T NCCR 7th Class 1899 NCCR 7th Class 1913 Port Elizabeth 0-4-0ST

2' 6" gauge	Cape Copper 0-6-0T Cape Copper Britannia Cape Copper Caledonia Cape Copper Clara Cape Copper Condenser Cape Copper Scotia Namaqua Copper Pioneer Walvis Bay Hope

2' gauge	CGR Baldwin 2-6-0 CGR NG 0-4-0T CGR NG 0-6-0T CGR NG 4-6-2T CGR Type A CGR Type B CGR Type C

List of South African locomotive classes South African locomotive history

Locomotives of South Africa

Steam

7' ¼" gauge	East London 0-4-0VB Table Bay 0-4-0ST Table Bay 0-4-0T Table Bay 0-4-0WT

4' 8½" gauge	Cape 0-4-0T Blackie Cape 0-4-2 Cape 2-4-0T CGR 0-4-0ST Aid Natal 0-4-0ST Durban Natal 0-4-0WT Natal Natal 4-4-0T Perseverance

3' 6" gauge Tank engines	CGR 0-4-0ST 1873 CGR 0-4-0ST 1874 CGR 0-4-0ST 1881 CGR 0-4-0ST 1881 Coffee Pot CGR 0-6-0ST CGR 0-6-0T CGR 2-6-0ST 1900 CGR 2-6-0ST 1902 CGR 1st Class 0-4-0ST 1875 CGR 1st Class 0-4-0ST 1876 CGR 1st Class 2-6-0ST CGR 1st Class 4-4-0T CGR 2nd Class 4-4-0T CGR 3rd Class 2-6-0T CGR Railmotor CSAR Class C CSAR Class E CSAR Rack 4-6-4RT CSAR Railmotor Durban's Congella Durban's Edward Innes Durban's John Milne Durban's Sir Albert Port Elizabeth 0-4-0ST Kowie Railway 0-6-0T Kowie Railway 4-4-0T Metropolitan & Suburban 4-6-2T NGR 2-6-0T Durban & Pietermaritzburg NGR Class I 2-6-2T NGR Class K 0-4-0ST NGR Class K 0-6-0ST NGR Class K 2-6-0T NZASM 10 Tonner NZASM 13 Tonner NZASM 14 Tonner NZASM 18 Tonner NZASM 19 Tonner NZASM 32 Tonner NZASM 40 Tonner PPR 26 Tonner PPR 35 Tonner Portuguese SAR Class A SAR Class B SAR Class C SAR Class C1 SAR Class C2 SAR Class D SAR Class E SAR Class F SAR Class G SAR Class H SAR Class H1 SAR Class H2 SAR Class J SAR Class K SAR Railmotor SAR Dock 0-4-0ST SAR Dock 0-4-0T SWA 2-8-0T

3' 6" gauge Tender engines	CGR 1st Class 2-6-0 1876 BP CGR 1st Class 2-6-0 1876 Kitson CGR 1st Class 2-6-0 1879 CGR 1st Class 2-6-0 1891 CGR 1st Class 4-4-0 CGR 1st Class 4-4-0TT CGR 2nd Class 2-6-2TT CGR 3rd Class 4-4-0 1883 CGR 3rd Class 4-4-0 1884 CGR 3rd Class 4-4-0 1889 CGR 3rd Class 4-4-0 1898 CGR 3rd Class 4-4-0 1901 CGR 3rd Class 4-4-0 1903 CGR 4th Class 4-4-2 CGR 4th Class 4-6-0TT 1880 CGR 4th Class 4-6-0TT 1882 CGR 4th Class 4-6-0TT 1882 Joy CGR 4th Class 4-6-0TT 1884 CGR 5th Class 4-6-0 1890 CGR 5th Class 4-6-0 1891 NGR Havelock NGR Class I SAR Class Exp 1 SAR Class Exp 2 SAR Class Exp 3 SAR Class Exp 4 SAR Class Exp 5 SAR Class Exp 6 SAR Class S SAR Class S1 SAR Class S2 SAR Class 1 SAR Class 1A SAR Class 1B SAR Class 2 SAR Class 2C SAR Class 3 SAR Class 3A SAR Class 3B SAR Class 4 SAR Class 4A SAR Class 5 SAR Class 5A SAR Class 5B SAR Class 6 SAR Class 6A SAR Class 6B SAR Class 6C SAR Class 6D SAR Class 6E SAR Class 6F SAR Class 6G SAR Class 6H SAR Class 6J SAR Class 6K SAR Class 6L SAR Class 6Y SAR Class 6Z SAR Class 7 SAR Class 7A SAR Class 7B SAR Class 7C SAR Class 7D SAR Class 7E SAR Class 7F SAR Class 8 SAR Class 8A SAR Class 8B SAR Class 8C SAR Class 8D SAR Class 8E SAR Class 8F SAR Class 8R SAR Class 8X SAR Class 8Y SAR Class 8Z SAR Class 9 SAR Class 10 SAR Class 10A SAR Class 10B SAR Class 10C SAR Class 10D SAR Class 11 SAR Class 12 SAR Class 12A SAR Class 12B SAR Class 13 SAR Class 14 SAR Class 14A SAR Class 14B SAR Class 14C 1st SAR Class 14C 2nd SAR Class 14C 3rd SAR Class 14C 4th SAR Class 15 SAR Class 15A SAR Class 15B SAR Class 15C SAR Class 15CA SAR Class 15E SAR Class 15F SAR Class 16 SAR Class 16A SAR Class 16B SAR Class 16C SAR Class 16D SAR Class 16DA 1928 SAR Class 16DA 1930 SAR Class 16E SAR Class 17 SAR Class 18 SAR Class 19 SAR Class 19A SAR Class 19B SAR Class 19C SAR Class 19D SAR Class 20 SAR Class 21 SAR Class 23 SAR Class 24 SAR Class 25 SAR Class 25NC SAR Class 26 SAR Katanga SWA 2-8-0

3' 6" gauge Articulated engines	CGR Fairlie CGR Kitson-Meyer SAR Class FC SAR Class FD SAR Class GA SAR Class GB SAR Class GC SAR Class GCA SAR Class GD SAR Class GDA SAR Class GE SAR Class GEA SAR Class GF SAR Class GG SAR Class GH SAR Class GK SAR Class GL SAR Class GM SAR Class GMA SAR Class GO SAR Class HF SAR Class KM SAR Class MA SAR Class MB SAR Class MC SAR Class MC1 SAR Class MD SAR Class ME SAR Class MF SAR Class MG SAR Class MH SAR Class MJ SAR Class MJ1 SAR Class U

2' 6" gauge	Cape Copper John King & Miner Cape Copper Britannia Cape Copper Caledonia Cape Copper Clara Cape Copper Condenser Cape Copper Scotia Namaqua Copper Pioneer Walvis Bay 2-4-2T Hope

2' & 600mm gauges	ACR Class NG-G16A CGR NG 0-4-0T CGR NG 0-6-0T CGR NG 4-6-2T CGR Type A 2-6-4T CGR Type C 0-4-0T NGR Class N 4-6-2T SAR Dutton SAR NG 0-4-0T SAR Class NG1 SAR Class NG2 SAR Class NG3 SAR Class NG4 SAR Class NG5 SAR Class NG6 SAR Class NG7 SAR Class NG8 SAR Class NG9 SAR Class NG10 SAR Class NG-G11 SAR Class NG-G12 SAR Class NG-G13 SAR Class NG-G14 SAR Class NG15 SAR Class NG-G16 SWA Class Ha SWA Class Hb SWA Class Hc SWA Class Hd SWA Jung SWA Zwillinge

Electric

Amcoal Class E38

Gas-electric

SAR Gas-electric

Diesel

3' 6" gauge Diesel-electric	PRASA Class Afro 4000 SAR Class DS SAR Class DS1 SAR Class 31-000 SAR Class 32-000 SAR Class 32-200 SAR Class 33-000 SAR Class 33-200 SAR Class 33-400 SAR Class 34-000 SAR Class 34-200 SAR Class 34-400 SAR Class 34-500 SAR Class 34-600 SAR Class 34-800 SAR Class 34-900 SAR Class 35-000 SAR Class 35-200 SAR Class 35-400 SAR Class 35-600 TFR Class 35-800 SAR Class 36-000 SAR Class 36-200 SAR Class 37-000 Spoornet Class 39-000 TFR Class 39-200 TFR Class 43-000 TFR Class 44-000

2' gauge Diesel-electric	SAR Class 91-000

3' 6" gauge Diesel-hydraulic	SAR Class 61-000

3' 6" gauge Electro-diesel	Spoornet Class 38-000

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