Namaqualand 0-4-0WT Condenser
Namaqualand 0-4-0WT Condenser | |
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Kitson works picture of the Cape Copper Company 0-4-0WT Condenser no. 1 "John Taylor", c. 1886 | |
Type and origin | |
Power type | Steam |
Designer | Kitson and Company |
Builder | Kitson and Company |
Serial number | T198, T220, T234 |
Build date | 1886-1888 |
Specifications | |
Configuration | 0-4-0WT |
Gauge | 2 ft 6 in (762 mm) |
Driver diameter | 34 in (864 mm) |
Wheelbase | 6 ft (1.829 m) |
Weight on drivers | 14 1⁄5 long tons (14.4 t) w/o |
Locomotive weight | 14 1⁄5 long tons (14.4 t) w/o |
Tender weight | 8 9⁄10 long tons (9.0 t) w/o |
Fuel type | Coal |
Fuel capacity | 16 cu ft (0.45 m3) |
Coolant capacity | 423 sq ft (39.3 m2) condensing surface |
Water capacity | 386 imp gal (1,750 l; 464 US gal) |
Boiler pressure | 150 psi (1,000 kPa) |
Firegrate area | 7 3⁄10 sq ft (0.678 m2) |
Heating surface: – Tubes | 157 3⁄5 sq ft (14.642 m2) |
– Firebox | 30 sq ft (2.787 m2) |
– Total | 187 3⁄5 sq ft (17.429 m2) |
Cylinders | Two |
Cylinder size |
9 in (229 mm) bore 15 in (381 mm) stroke |
Performance figures | |
Tractive effort | 4,020 lbf (18 kN) at 75% pressure |
Career | |
Operator(s) |
Cape Copper Mining Company Cape Copper Company |
Number in class | 3 |
Official name | John Taylor, Juanita & Jackal |
Delivered | 1886-1888 |
First run | 1886 [1] |
The Namaqualand 0-4-0WT Condenser of 1886 is a South African steam locomotive from the pre-Union era in the Cape Colony.
Between 1886 and 1888 three well-tank condensing locomotives with a 0-4-0 wheel arrangement were placed in service by the Cape Copper Mining Company on its two foot six inch gauge Namaqualand Railway between Port Nolloth and O'okiep in the Cape Colony.[1] They were the first condensing steam locomotives to enter service in South Africa.
Namaqualand Railway
The Namaqualand Railway was constructed between 1869 and 1876 by the Cape Copper Mining Company, restructured as the Cape Copper Company in 1888. The 93 1⁄2 miles (150 kilometres) long line from Port Nolloth on the West Coast to the copper mines around O'okiep was initially exclusively mule-powered, but in 1871 two 0-6-0T locomotives named John King and Miner were acquired by the mining company on an experimental basis. Their use appears to have been restricted mainly to the coastal section of the railway and by July 1887 both of them were permanently out of service.[1]
The Kitson condensers
Between 1886 and 1888 three 0-4-0 well-tank condensing locomotives were acquired from Kitson and Company. They were named John Taylor, Juanita and Jackal respectively, and like the earlier 0-6-0T locomotives they were operated with tenders due to the scarcity of water along the line. The tenders for the first two locomotives seem to have been acquired separately.[1]
The condenser was mounted overhead in a roof-like frame containing copper coils that formed an atmospheric radiator. Condensed steam was fed back for re-use into the large water tank underneath the locomotive's copper boiler. To protect the motion and bearings as well as working parts of the valve gear above the running boards from wind-blown sand, the locomotive was equipped with sheet-metal casing above and below the running boards, with the centre part of the bottom encasement hinged to allow access to the motion.[1]
The builder's picture of the locomotive shows it without a cab and with only a spectacle plate for crew protection, but in photographs of the locomotives in service they have cab roofs installed beneath the overhead condensing coils.[1]
The engine John Taylor
The first condensing locomotive, no. 1 named John Taylor after a director of the Cape Copper Mining Company, was built in 1886 with Kitson works number T198 and was delivered in mid-1886. It commenced trial runs in July 1886 and entered service on the 22 miles (35 kilometres) section from Port Nolloth to Abbevlaack in August 1886.[1]
The engine Juanita
Engine no. 2 named Juanita was also built in 1886, with Kitson works number T220, and was delivered in March 1887. When it entered service, the duties of the two condensing locomotives were extended to Anenous, a distance of 47 1⁄2 miles (76 kilometres) from Port Nolloth, and possibly all the way to Steinkopf at 59 miles (95 kilometres). Gross train weights, excluding tenders, for the section to Anenous were 67 tons up and 155 tons down with 34 trucks in a train.[1]
The engine Jackal
Engine no. 3 named Jackal, built in 1888 with Kitson works number T234, was delivered in December of that year and entered service in January 1889. Unlike the other two, it was delivered with a tender. In May 1894 the engine Jackal took the record for the fastest run between O'okiep and Port Nolloth, hauling a one-coach special in just under four hours at an average speed of about 23 miles per hour (37 kilometres per hour).[1]
Service
After the arrival of their successor tender locomotives from 1890, it was possible to introduce a through steam-hauled service from the coast to O'okiep from 15 May 1893. The condensing locomotives were then relegated to lesser duties, mainly ballast, sand clearing and other work trains. They also served as standby power to cover breakdowns and overhauls of the new mainline locomotives.[1]
From December 1896 one of them was allocated to O'okiep for shunting and local work, including service as construction locomotive while the Nababeep branchline was being built, and then as branchline power after the line was opened in late 1898 or early 1899. The locomotives were rotated occasionally and all three had service spells as the O'okiep engine, but by 1910 they were no longer used on the Nababeep line since the trains had become too heavy.[1]
As a result of the poor quality of water in the region and tough working conditions, the three locomotives suffered major problems with their fireboxes and tubes and replacements were required fairly frequently. As an example, the engine Juanita required a new boiler and firebox in 1895, just eight years after entering service. The condensing system was also never successful due to the high ambient temperatures in the region.[1]
They remained in service on lower section traffic on the mainline until at least 1899. At some stage between then and late 1906, after they were replaced on mainline service, their condensing equipment was removed, they lost their tenders and they were equipped with more substantial cabs and extended coal bunkers. According to the Cape Copper Company annual report on the year ending 30 April 1916, all three locomotives were still in service at that time.[1]
Modifications illustrated
The following pictures serve to illustrate the Condensers in service as well as some of the modifications done to them.
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A condenser with tender working a company picnic train at O'okiep, c. 1890
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Possibly John Taylor with cab roof installed and motion exposed, c. 1886
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Jackal modified to non-condensing with extended bunker and altered cab, c. 1920
See also
- List of South African locomotive classes
- South African locomotive history
- The 0-4-0 wheel arrangement
References
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