CGR 10th Class 4-8-0 South African Class Experimental 6 4-8-0 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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CGR 10th Class no. 880, c. 1906 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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The leading coupled axle had flangeless wheels |
The South African Railways Class Experimental 6 4-8-0 of 1906 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
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.
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.
In 1906, the Cape Government Railways placed a single experimental 10th Class steam locomotive with a 4-8-0 Mastodon type wheel arrangement in service on its Eastern System. In 1912, when this locomotive was assimilated into the South African Railways, it was renumbered and designated Class Experimental 6. [1] [2] [3] [4]
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.
Under the Whyte notation for the classification of steam locomotives, 4-8-0 represents the wheel arrangement of four leading wheels on two axles, usually in a leading truck or bogie, eight powered and coupled driving wheels on four axles and no trailing wheels. In North America and in some other countries the type was usually known as the Mastodon and sometimes as the Twelve-wheeler.
The Cape 10th Class steam locomotive was designed by H.M. Beatty, the Locomotive Superintendent of the Cape Government Railways (CGR) from 1896 to 1910. The designs were prepared at the Salt River shops of the CGR in Cape Town and represented a further effort on Beatty's part to improve the steaming efficiency of his 8th Class of 1904. The 10th Class was, in most respects, a larger and more powerful version of the 8th Class, which it was meant to eventually replace on the Eastern System. In 1906, only one locomotive with a Type XF2 tender was delivered by Kitson and Company, numbered 880. [1] [2] [3] [4]
The South African Railways Class 8F 4-8-0 of 1904 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African type XF2 tender was a steam locomotive tender from the pre-Union era in the Cape of Good Hope.
Kitson and Company was a locomotive manufacturer based in Hunslet, Leeds, West Yorkshire, England.
With this locomotive, as with the 9th Class Mikado which had been delivered by the same manufacturer earlier in that same year, Beatty overcame his aversion to boiler centre lines which exceeded twice the Cape gauge track width of 3 feet 6 inches (1,067 millimetres) above the railhead. The boiler pitch of the Cape 10th Class was at 7 feet 5 inches (2,261 millimetres). [1]
The South African Railways Class Experimental 5 2-8-2 of 1906 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
In the designs of the two Cape 9th Class Mikado types, later the Classes Experimental 4 and Experimental 5, Beatty had achieved improved steaming efficiency by extending the locomotive frames with a bridle casting, such as the one he had designed for the CGR 6th Class 2-6-4 in 1901, to accommodate deep and wide fireboxes. [1] [2] [4]
The South African Railways Class Experimental 4 2-8-2 of 1903 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African Railways Class 6Z 2-6-4 of 1901 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
With the 10th Class, on the other hand, he obtained a wide firebox by spreading the grate over the rear coupled wheels, hence the requirement to raise the boiler pitch. The front portion of the firebox formed a combustion chamber, which reduced spark throwing and thereby reduced wear on the tube ends. The inside of the firebox was of copper and the plates were 5⁄8 inch (16 millimetres) thick throughout, except for the tube plate, which was 1 inch (25 millimetres) thick at the tube ends. This firebox design was uncomplicated and allowed for liberal water spaces. The result was a firebox which was virtually a copy of the one which was used on the Hendrie B locomotive which had been placed in service on the Natal Government Railways (NGR) in 1904. [1] [2] [4]
The South African Railways Class 1 4-8-0 of 1904 was a steam locomotive from the pre-Union era in the Colony of Natal.
The Natal Government Railways (NGR) was formed in January 1877 in the Colony of Natal.
The locomotive used saturated steam and had flat "D" type slide valves, placed above the cylinders and operated by Stephenson Link valve gear through rocker shafts. The leading wheels were mounted in a spring control bogie which was designed to overcome the problems of excessive flange wear on the coupled wheels and rail cutting on curves. [2]
The locomotive was placed in service on the Eastern System, working on the mainline out of East London. It proved to be very successful in service and was able to handle loads of 280 long tons (284 tonnes) up the steep 1 in 40 (2½%) gradient of the mainline, which began right at the end of the departure platform at East London station at the time. This compared favourably to the 240 long tons (244 tonnes) which the 8th Class could manage. [1] [4]
Despite its good performance, the design was never repeated since some trouble was experienced with the firebox which, although wide, had to be shallow to be carried over the intermediate and trailing coupled wheels. Instead, Beatty decided that more powerful locomotives could be designed by using the wide and deep firebox which he had used in his Karoo Class locomotives and the Cape 10th Class therefore remained one of a kind. [1] [2]
When the Union of South Africa was established on 31 May 1910, the three Colonial government railways (CGR, NGR 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. [3] [5]
In 1912, the Cape 10th Class was designated Class Experimental 6 and renumbered to 1244 on the South African Railways. It was withdrawn from service in 1938. [3] [4] [6]
The South African Railways Class A 4-8-2T of 1888 was a steam locomotive from the pre-Union era in the Colony of Natal.
The South African Railways Class 10 4-6-2 of 1904 was a steam locomotive from the pre-Union era in Transvaal Colony.
The South African Railways Class 8X 2-8-0 of 1901 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
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The South African Railways Class 8E 4-8-0 of 1903 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African Railways Class 6G 4-6-0 of 1901 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African Railways Class 6H 4-6-0 of 1901 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African Railways Class 6Y 2-6-2 of 1903 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African Railways Class 5A 4-6-2 of 1903 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African Railways Class 5B 4-6-2 of 1904 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
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The South African Railways Class 4 4-8-2 of 1911 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African Railways Class 2C 4-6-2 of 1910 was a steam locomotive from the pre-Union era in the Colony of Natal.
The South African Railways Class 3 4-8-2 of 1909 was a steam locomotive from the pre-Union era in the Colony of Natal.
The South African Railways Class Experimental 2 2-8-0 of 1902 was a steam locomotive from the pre-Union era in the Cape of Good Hope.
The South African Railways Class MA 2-6-6-0 of 1909 was a steam locomotive from the pre-Union era in the Natal Colony.
The Cape Government Railways 5th Class 4-6-0 of 1891 was a South African steam locomotive from the pre-Union era in the Cape of Good Hope.
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