South African Class 15CA 4-8-2 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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No. 2802 at Esselen Park, 21 September 2009 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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♠ The leading coupled axle had flangeless wheels |
The South African Railways Class 15CA 4-8-2 of 1926 was a steam locomotive.
In 1926, the South African Railways placed 23 Class 15CA steam locomotives with a 4-8-2 Mountain type wheel arrangement in service. Another 61 engines were ordered and delivered from three manufacturers in 1929 and 1930. [1] [2] [3]
After the twelve Class 15C Big Bill 4-8-2 Mountain type locomotives which were delivered by Baldwin Locomotive Works in 1925 had been in service a short while, it was discovered that the frames under the front of the firebox had a tendency to crack, necessitating heavy repairs. [1] [2]
To overcome this, a new modified design was prepared by Col F.R. Collins DSO, the Chief Mechanical Engineer (CME) of the South African Railways (SAR), for an almost identical locomotive but with the frames shortened to the front of the firebox and widened under the firebox by means of a bridle casting. [1]
The first batch of 23 of these redesigned locomotives were built for the SAR by the American Locomotive Company (ALCO). They were delivered in 1926, numbered in the range from 2039 to 2059, 2072 and 2073, and designated Class 15CA. The "A" supposedly indicated the manufacturer ALCO rather than, as was usual SAR practice, a different version of an existing locomotive type. [1] [2] [3] [4]
The earlier Baldwin-built Class 15C was then reclassified to Class 15CB for no good reason, since the "B" merely indicated the manufacturer Baldwin and not, as was usual practice, a branchline locomotive. [4]
Another 61 Class 15CA locomotives were acquired in four batches from three other manufacturers in 1929 and 1930. Like the 23 ALCO-built locomotives, all except the last batch were built with 23 inches (584 millimetres) bore cylinders. [2]
Apart from the redesigned frame under the firebox, these locomotives were very similar to the Class 15C in proportions and appearance. They also had Coale pop type safety valves, a Schmidt type superheater and a combustion chamber in the firebox, which was equipped with flexible side stays and water siphon arch tubes. Their coupled wheel axleboxes, crank pins and connecting rod big ends were grease lubricated. These engines used the same Type KT tenders with a coal capacity of 14 long tons (14.2 tonnes) and a water capacity of 6,000 imperial gallons (27,300 litres). [2] [1]
The locomotives were delivered with 57 inches (1,448 millimetres) diameter coupled wheels and their boilers were set at an operating pressure of 200 pounds per square inch (1,379 kilopascals). All their coupled wheels were eventually retyred to a 60 inches (1,524 millimetres) diameter and to compensate for the loss of tractive effort due to the larger diameter wheels, their operating boiler pressure was increased from 200 to 210 pounds per square inch (1,379 to 1,448 kilopascals) by an adjustment of the setting of their safety valves. This modification enabled these mixed traffic locomotives to handle the fastest mainline passenger trains. [1] [6] [7]
In addition, all those locomotives which had been built with 23 inches (584 millimetres) bore cylinders had their cylinders reamed to a bore of 24 inches (610 millimetres). [2]
When larger tyres were fitted to their coupled wheels, the old tyres were left in position and turned down on the wheel centres to serve as liners and the new tyres were then shrunk on over the liners. The leading coupled wheels, which had been flangeless as built, were flanged during the retyring. The practice of increasing the diameter of coupled wheels, wheel spacing and other considerations permitting, was begun by A.G. Watson during his term in office as CME and was continued by his successors. The reduction of tractive effort caused by the larger wheels was made up by increasing boiler pressure or by fitting larger cylinders or both, as required. This policy resulted in more mileage between heavy repairs, less cost-per-mile on repairs and locomotives capable of higher speeds. [2]
During the early 1940s, three of the Class 15CB and Class 15CA locomotives were reboilered with new boilers numbered in the range from 9504 to 9506. These boilers were of similar dimensions as the originals but with a different tube arrangement. It was designed by Dr. M.M. Loubser, CME at the time. The reboilered locomotives were not reclassified. [6] [7]
The Class 15CA locomotives were placed in service on the mainline between Cape Town and Kimberley but like the Class 15CB, they were later transferred to Bloemfontein. From here they worked throughout the Free State until they were eventually relocated to the Eastern Transvaal system. There they worked out of Pretoria to Pietersburg in the north and from there to Tzaneen in the east and Messina on the Rhodesian border in the north. Some also worked out of Witbank and Breyten. [3] [4]
In the early 1960s, a few joined the Class 15CB on the National North Coast line. Here they were used on, amongst others, the night and day passenger trains to and from Empangeni on the north coast line and on passenger trains to and from Kelso on the south coast line. In 1983, they all went from there to the Cape Northern system for use on the lines from Beaconsfield in Kimberley, working north to Mafeking and south to De Aar. Eventually nearly forty of them ended up as heavy shunters at Kaserne and Germiston in Johannesburg where they replaced the Class 12AR and Class S1. [3] [4] [8] [9]
15CA 2828 is now plinthed at the Gospel Express, Vinkrivier Station, R60, Robertson, is the Western Cape, South Africa. 2828 completes the 11 coaches stationed at Vink, as accommodation for the Gospel Express Christian Centre.
Three Class 15CA locomotives were sold into industrial service. Numbers 2807 and 2839 went to Dunn's Locomotive Works and were eventually sold to Rustenburg Platinum Mines. No. 2811 went to South Witbank Colliery as their no. 4. [4] [10]
The table lists the Class 15CA engine numbers, builders, years built and the builders' works numbers. The colour coding following the engine numbers refers to the three axle loadings of the different batches of the Class 15CA, as shown in the table of specifications.
SAR No. | Builder | Year | Works No. |
---|---|---|---|
2039 ʘ | ALCO | 1926 | 66986 |
2040 ʘ | ALCO | 1926 | 66987 |
2041 ʘ | ALCO | 1926 | 66988 |
2042 ʘ | ALCO | 1926 | 66989 |
2043 ʘ | ALCO | 1926 | 66990 |
2044 ʘ | ALCO | 1926 | 66991 |
2045 ʘ | ALCO | 1926 | 66992 |
2046 ʘ | ALCO | 1926 | 66993 |
2047 ʘ | ALCO | 1926 | 66994 |
2048 ʘ | ALCO | 1926 | 66995 |
2049 ʘ | ALCO | 1926 | 66996 |
2050 ʘ | ALCO | 1926 | 66997 |
2051 ʘ | ALCO | 1926 | 66998 |
2052 ʘ | ALCO | 1926 | 66999 |
2053 ʘ | ALCO | 1926 | 67000 |
2054 ʘ | ALCO | 1926 | 67001 |
2055 ʘ | ALCO | 1926 | 67002 |
2056 ʘ | ALCO | 1926 | 67003 |
2057 ʘ | ALCO | 1926 | 67004 |
2058 ʘ | ALCO | 1926 | 67005 |
2059 ʘ | ALCO | 1926 | 67006 |
2072 ʘ | ALCO | 1926 | 67007 |
2073 ʘ | ALCO | 1926 | 67008 |
2074 ʘ | Baldwin | 1929 | 60828 |
2075 ʘ | Baldwin | 1929 | 60829 |
2076 ʘ | Baldwin | 1929 | 60830 |
2077 ʘ | Baldwin | 1929 | 60831 |
2801 ʘ | Breda | 1929 | 2236 |
2802 ʘ | Breda | 1929 | 2237 |
2803 ʘ | Breda | 1929 | 2238 |
2804 ʘ | Breda | 1929 | 2239 |
2805 ʘ | Breda | 1929 | 2240 |
2806 ʘ | Breda | 1929 | 2241 |
2807 ʘ | Breda | 1929 | 2242 |
2808 ʘ | Breda | 1929 | 2243 |
2809 ʘ | Breda | 1929 | 2244 |
2810 ʘ | Breda | 1929 | 2245 |
2811 ʘ | NBL | 1928 | 23774 |
2812 ʘ | NBL | 1928 | 23775 |
2813 ʘ | NBL | 1928 | 23776 |
2814 ʘ | NBL | 1928 | 23777 |
2815 ʘ | NBL | 1928 | 23778 |
2816 ʘ | NBL | 1928 | 23779 |
2817 ʘ | NBL | 1928 | 23780 |
2818 ʘ | NBL | 1928 | 23781 |
2819 ʘ | NBL | 1928 | 23782 |
2820 ʘ | NBL | 1928 | 23783 |
2821 ʘ | NBL | 1928 | 23784 |
2822 ʘ | NBL | 1928 | 23785 |
2823 ʘ | NBL | 1928 | 23786 |
2824 ʘ | NBL | 1928 | 23787 |
2825 ʘ | NBL | 1928 | 23788 |
2826 ʘ | NBL | 1928 | 23789 |
2827 ʘ | NBL | 1928 | 23790 |
2828 ʘ | NBL | 1928 | 23791 |
2829 ʘ | NBL | 1928 | 23792 |
2830 ʘ | NBL | 1928 | 23793 |
2831 ʘ | NBL | 1928 | 23794 |
2832 ʘ | NBL | 1928 | 23795 |
2833 ʘ | NBL | 1928 | 23796 |
2834 ʘ | NBL | 1928 | 23797 |
2835 ʘ | NBL | 1928 | 23798 |
2836 ʘ | NBL | 1928 | 23799 |
2837 ʘ | NBL | 1928 | 23800 |
2838 ʘ | NBL | 1928 | 23801 |
2839 ʘ | NBL | 1928 | 23802 |
2840 ʘ | NBL | 1929 | 24008 |
2841 ʘ | NBL | 1929 | 24009 |
2842 ʘ | NBL | 1929 | 24010 |
2843 ʘ | NBL | 1929 | 24011 |
2844 ʘ | NBL | 1929 | 24012 |
2845 ʘ | NBL | 1929 | 24013 |
2846 ʘ | NBL | 1929 | 24014 |
2847 ʘ | NBL | 1929 | 24015 |
2848 ʘ | NBL | 1929 | 24016 |
2849 ʘ | NBL | 1929 | 24017 |
2850 ʘ | NBL | 1929 | 24018 |
2851 ʘ | NBL | 1929 | 24019 |
2852 ʘ | NBL | 1929 | 24020 |
2853 ʘ | NBL | 1929 | 24021 |
2854 ʘ | NBL | 1929 | 24022 |
2855 ʘ | NBL | 1929 | 24023 |
2856 ʘ | NBL | 1929 | 24024 |
2857 ʘ | NBL | 1929 | 24025 |
Number | Works nmr | THF / Private | Leaselend / Owner | Current Location | Outside South Africa | ? |
---|---|---|---|---|---|---|
2039 | ALCO 66986 | THF/Private | MISLPT (Michael Barclay) | Krugersdorp Locomotive Depot | Ownership Unclear | |
2040 | ALCO 66987 | THF/Private | MISLPT (Michael Barclay) | Krugersdorp Locomotive Depot | Ownership Unclear | |
2041 | ALCO 66988 | THF/Private | MISLPT (Michael Barclay) | Krugersdorp Locomotive Depot | Ownership Unclear | |
2055 | ALCO 67005 | THF | Rustenburg (Station) | |||
2056 | ALCO 67003 | THF | Reefsteamers | Germiston Locomotive Depot | ||
2077 | BAL 60831 | THF/Private | MISLPT (Michael Barclay) | Krugersdorp Locomotive Depot | Ownership Unclear | |
2802 | BREDA 2237 | THF | Esslenpark Railway College | |||
2803 | BREDA 2238 | THF/Private | MISLPT (Michael Barclay) | Krugersdorp Locomotive Depot | Ownership Unclear | |
2804 | BREDA 2239 | THF | Esslenpark Railway College | |||
2820 | NBL 23783 | THF/Private | MISLPT (Michael Barclay) | Krugersdorp Locomotive Depot | Ownership Unclear | |
2825 | NBL 23788 | THF | Krugersdorp Locomotive Depot | |||
2828 | NBL 23791 | THF | Gospel Express | Vink (Station) | ||
2833 | NBL 23796 | THF | Krugersdorp Locomotive Depot | |||
2836 | NBL 23799 | THF | Krugersdorp Locomotive Depot | |||
2850 | NBL 24018 | THF | Wonder Steam Trains | |||
2853 | NBL 24021 | THF | Krugersdorp Locomotive Depot |
The main picture shows Breda-built no. 2802, serving as school guard at Esselen Park, the Transnet School of Rail in Kaalfontein, Gauteng, on 21 September 2009.
Under the Whyte notation for the classification of steam locomotives, 4-8-2 represents the wheel arrangement of four leading wheels, eight powered and coupled driving wheels and two trailing wheels. This type of steam locomotive is commonly known as the Mountain type, though the New York Central Railroad used the name Mohawk for their 4-8-2s.
Under the Whyte notation for the classification of steam locomotives by wheel arrangement, 2-6-6-0 is a locomotive with one pair of unpowered leading wheels, followed by two sets of three pairs of powered driving wheels and no trailing wheels. The wheel arrangement was principally used on Mallet-type articulated locomotives. Some tank locomotive examples were also built, for which various suffixes to indicate the type of tank would be added to the wheel arrangement, for example 2-6-6-0T for an engine with side-tanks.
The South African Railways Class 23 4-8-2 was a class of South African steam locomotives.
The South African Railways Class 19D 4-8-2 of 1937 was a steam locomotive.
The South African Railways Class 16E 4-6-2 of 1935 is a class of passenger steam locomotive.
The South African Railways Class 16DA 4-6-2 of 1928 was a steam locomotive.
The South African Railways Class 16C 4-6-2 of 1919 was a steam locomotive.
The South African Railways Class 16 4-6-2 of 1914 was a steam locomotive.
The South African Railways Class 15F 4-8-2 of 1938 is a steam locomotive.
The South African Railways Class 15C 4-8-2 of 1925 was a steam locomotive.
The South African Railways Class 15B 4-8-2 of 1918 was a steam locomotive.
The South African Railways Class 15A 4-8-2 of 1914 was a steam locomotive.
The South African Railways Class 14C 4-8-2 of 1922 was a steam locomotive.
The South African Railways Class 12A 4-8-2 of 1919 was a steam locomotive.
The South African Railways Class 12 4-8-2 of 1912 was a steam locomotive.
The South African Railways Class 8B 4-8-0 of 1903 was a steam locomotive from the pre-Union era in Transvaal Colony.
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 MG 2-6-6-2 of 1911 was a steam locomotive from the pre-Union era in Transvaal.
The South African Railways Class 14C 4-8-2 of 1919 was a steam locomotive.
The South African Railways Class 16DA 4-6-2 of 1930 is a class of steam locomotives.
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