CGR NG 4-6-2T

4 ft 10+1⁄2 in (1,486 mm) • Diameter3 ft 2+1⁄8 in (968 mm)Boiler pressure180 psi (1,241 kPa)Safety valveRamsbottomHeating surface: • Firebox38.9 sq ft (3.61 m²)CylindersTwoCylinder size11+3⁄4 in (298 mm) bore
16 in (406 mm) strokeValve gearWalschaertsCouplersBell-and-hook

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

Career
Operators	Cape Government Railways South African Railways
Number in class	2
Numbers	CGR 42-43, SAR NG33-NG34
Delivered	1908
First run	1908
Withdrawn	1929

The 2nd coupled axle had flangeless wheels

The Cape Government Railways NG 4-6-2T of 1908 was a South African narrow-gauge steam locomotive from the pre-Union era in the Cape of Good Hope.

In 1908, the Cape Government Railways placed two 4-6-2T Pacific type narrow-gauge steam locomotives in passenger service on the Walmer branch in Port Elizabeth. In 1912, both locomotives were assimilated into the South African Railways and renumbered.^[1]^[2]^[3]^[4]

Manufacturer

Two 4-6-2T narrow-gauge steam locomotives were built for the Cape Government Railways (CGR) by W.G. Bagnall in 1908. The engines were equally powerful tank locomotive versions of the [[South African Class NG8 4-6-0|CGR Type B 4-6-0]] narrow-gauge tender locomotive of 1904, also built by Bagnall, but with Walschaerts instead of Stephenson valve gear. They were not classified and were numbered 42 and 43.^[2]^[3]^[5]^[6]

Characteristics

Like their Type B 4-6-0 sister engines, the locomotives had bar frames. The drivers, the middle wheelset of the coupled wheels, were flangeless to enable the engine to negotiate sharp curves. The coupled wheels were not spaced equidistant from each other, with 39 inches (991 millimetres) between the wheel centres of the leading wheelset and the drivers and 36 inches (914 millimetres) between the wheel centres of the drivers and the trailing wheelset.^[3]

Service

Cape Government Railways

In 1906, a passenger-only suburban branch line had been opened from Valley Junction, near Port Elizabeth on the Avontuur line, to the suburb of Walmer. It was used by up to 22 trains per day. Both locomotives were placed in service on the Walmer branch line.^[2]^[3]^[7]

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 were only implemented with effect from 1 January 1912.^[1]^[8]

In 1912, the two locomotives were renumbered no. NG33 and NG34 on the South African Railways (SAR), with the "NG" number prefix identifying them as narrow-gauge locomotives in the SAR registers. They remained in service on the Walmer branch for the duration of their service lives, until the line was closed in 1929. They were then withdrawn from service, shortly before a classification system for narrow-gauge locomotives was to be introduced by the SAR.^[2]^[3]

References

Wikimedia Commons has media related to CGR NG 4-6-2T.

^ ^a ^b Classification of S.A.R. Engines with Renumbering Lists, issued by the Chief Mechanical Engineer’s Office, Pretoria, January 1912, p. 47 (Reprinted in April 1987 by SATS Museum, R.3125-6/9/11-1000)
^ ^a ^b ^c ^d Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 113, 156. ISBN 0869772112.
^ ^a ^b ^c ^d ^e 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.
^ Dulez, Jean A. (2012). Railways of Southern Africa 150 Years (Commemorating One Hundred and Fifty Years of Railways on the Sub-Continent – Complete Motive Power Classifications and Famous Trains – 1860–2011) (1st ed.). Garden View, Johannesburg, South Africa: Vidrail Productions. p. 232. ISBN 9 780620 512282.
^ Baker, Allan C.; Civil, T. D. Allen (1984). Bagnalls of Stafford – Locomotive Works List (1st ed.). England: The Industrial Locomotive Society
^ Soul of A Railway - System 3: Cape Midland, based in Port Elizabeth – Part 1: The Port Elizabeth Narrow Gauge – Captions 8–10 Archived 24 July 2021 at the Wayback Machine (Accessed on 10 December 2016)
^ Rollison, Richard (23 November 1973). "Saga of the Apple Express". Evening Post. Retrieved 26 December 2011..
^ The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 25.

Locomotives of the Cape of Good Hope

7' ¼" gauge

East London 0-4-0VB

4' 8½" gauge

CGR 0-4-0ST Aid

3' 6" gauge

Metropolitan & Suburban 4-6-2T

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

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
Standard 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
Cape 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
Cape 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
Cape 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

Cape 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 TFR Class 45-000
2' gauge Diesel-electric	SAR Class 91-000
Cape gauge Diesel-hydraulic	SAR Class 61-000
Cape gauge Electro-diesel	Spoornet Class 38-000