CGR NG 4-6-2T

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CGR NG 4-6-2T
South African NG 4-6-2T
CGR 4-6-2T 1908.jpg
CGR narrow-gauge 4-6-2T
Type and origin
Power type Steam
Designer W.G. Bagnall
Builder W.G. Bagnall
Serial number 1866-1867
Build date May & June 1908 (ex works)
Specifications
Configuration:
​
 •  Whyte 4-6-2T (Pacific)
 •  UIC 2'C1'n2t
Driver 2nd coupled axle
Gauge 2 ft (610 mm) narrow
Leading dia. 22 in (559 mm)
Coupled dia. 33 in (838 mm)
Trailing dia. 22 in (559 mm)
Wheelbase 19 ft 1 in (5,817 mm)
 • Leading 4 ft (1,219 mm)
 • Coupled 6 ft 3 in (1,905 mm)
Wheel spacing
(Asymmetrical)		1-2: 3 ft 3 in (991 mm)
2-3: 3 ft (914 mm)
Length:
​
 • Over couplers 27 ft 8 in (8,433 mm)
Height 10 ft 6 in (3,200 mm)
Frame type Bar
Axle load 7 LT 1 cwt 1 qtr (7,176 kg)
 •  Leading 3 LT (3,048 kg)
 • 1st coupled 6 LT 16 cwt 1 qtr (6,922 kg)
 • 2nd coupled 7 LT 1 cwt 1 qtr (7,176 kg)
 • 3rd coupled 6 LT 16 cwt 1 qtr (6,922 kg)
Loco weight 28 LT 13 cwt 3 qtr (29,150 kg)
Fuel type Coal
Fuel capacity 1 LT (1.0 t)
Water cap 550 imp gal (2,500 l)
Firebox type Round-top
 • Firegrate area 7.6 sq ft (0.71 m2)
Boiler:
​
 • Pitch 4 ft 10 1⁄2 in (1,486 mm)
 • Diameter 3 ft 2 1⁄8 in (968 mm)
Boiler pressure 180 psi (1,241 kPa)
Safety valve Ramsbottom
Heating surface:
 • Firebox		 38.9 sq ft (3.61 m2)
Cylinders Two
Cylinder size 11 3⁄4 in (298 mm) bore
16 in (406 mm) stroke
Valve gear Walschaerts
Couplers Bell-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Withdrawn 1929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.

Union of South Africa state in southern Africa from 1910 to 1961, predecessor to the Republic of South Africa

The Union of South Africa is the historical predecessor to the present-day Republic of South Africa. It came into being on 31 May 1910 with the unification of the Cape Colony, the Natal Colony, the Transvaal, and the Orange River Colony. It included the territories that were formerly a part of the South African Republic and the Orange Free State.

Cape Colony Dutch and British colony in Southern Africa

The Cape of Good Hope, also known as the Cape Colony, was a British colony in present-day South Africa, named after the Cape of Good Hope. The British colony was preceded by an earlier Dutch colony of the same name, the Kaap de Goede Hoop, established in 1652 by the Dutch East India Company. The Cape was under Dutch rule from 1652 to 1795 and again from 1803 to 1806. The Dutch lost the colony to Great Britain following the 1795 Battle of Muizenberg, but had it returned following the 1802 Peace of Amiens. It was re-occupied by the UK following the Battle of Blaauwberg in 1806, and British possession affirmed with the Anglo-Dutch Treaty of 1814.

Contents

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]

Port Elizabeth Place in Eastern Cape, South Africa

Port Elizabeth or The Bay is one of the major cities in South Africa; it is situated in the Eastern Cape Province, 770 km (478 mi) east of Cape Town. The city, often shortened to PE and nicknamed "The Windy City", stretches for 16 km along Algoa Bay, and is one of the major seaports in South Africa. Port Elizabeth is the southernmost large city on the African continent, just farther south than Cape Town. Port Elizabeth was founded as a town in 1820 to house British settlers as a way of strengthening the border region between the Cape Colony and the Xhosa. It now forms part of the Nelson Mandela Bay Metropolitan Municipality, which has a population of over 1.3 million.

Manufacturer

Two 4-6-2 Pacific type narrow-gauge side-tank 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 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]

4-6-2 wheel arrangement of a locomotive with 4 leading wheels, 6 driving wheels and 2 trailing wheels

Under the Whyte notation for the classification of steam locomotives, 4-6-2 represents the wheel arrangement of four leading wheels on two axles, six powered and coupled driving wheels on three axles and two trailing wheels on one axle. The 4-6-2 locomotive became almost globally known as a Pacific type.

Cape Government Railways railway operator in the Cape Colony

The Cape Government Railways (CGR) was the government-owned railway operator in the Cape Colony from 1874 until the creation of the South African Railways (SAR) in 1910.

W. G. Bagnall British locomotive manufacturer, active 1875–1962

W. G. Bagnall was a locomotive manufacturer from Stafford, England which was founded in 1875 and operated until it was taken over in 1962 by English Electric.

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]

Avontuur Place in Western Cape, South Africa

Avontuur is a town situated in the Garden Route District Municipality in the Western Cape province of South Africa. The town is located 13km south-east of Uniondale on an intersection of the R339 and R62 regional routes. The name is Afrikaans for adventure; its origin, however, remains uncertain. The river from which the town takes its name was known in 1778.

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]

Natal Government Railways A government owned organization that managed the railway system in the Colony of Natal from 1875 to 1911

The Natal Government Railways (NGR) was formed in January 1877 in the Colony of Natal.

Central South African Railways railway operator in the Transvaal and Orange River Colonies from 1902 to 1910

The Central South African Railways (CSAR) was from 1902 to 1910 the operator of public railways in the Transvaal Colony and Orange River Colony in what is now South Africa. During the Anglo-Boer War, as British forces moved into the territory of the Orange Free State and the South African Republic, the Orange Free State Government Railways, the Netherlands-South African Railway Company and the Pretoria-Pietersburg Railway were taken over by the Imperial Military Railways under Lieutenant-Colonel Sir Percy Girouard. After the war had ended, the Imperial Military Railways became the Central South African Railways in July 1902, with Thomas Rees Price as General Manager. With the creation of the Union of South Africa in 1910, the CSAR was merged with the Cape Government Railways and the Natal Government Railways to form the South African Railways.

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]

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References

  1. 1 2 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)
  2. 1 2 3 4 Paxton, Leith; Bourne, David (1985). Locomotives of the South African Railways (1st ed.). Cape Town: Struik. pp. 113, 156. ISBN   0869772112.
  3. 1 2 3 4 5 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.
  4. ↑ 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.
  5. ↑ Baker, Allan C.; Civil, T. D. Allen (1984). Bagnalls of Stafford – Locomotive Works List (1st ed.). England: The Industrial Locomotive Society
  6. ↑ Soul of A Railway - System 3: Cape Midland, based in Port Elizabeth – Part 1: The Port Elizabeth Narrow Gauge – Captions 8–10 (Accessed on 10 December 2016)
  7. ↑ Rollison, Richard (1973-11-23). "Saga of the Apple Express". Evening Post. Retrieved 2011-12-26..
  8. ↑ The South African Railways - Historical Survey. Editor George Hart, Publisher Bill Hart, Sponsored by Dorbyl Ltd., Published c. 1978, p. 25.
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