South West African 0-10-0

DSWA Ten-Coupled Tender 0-10-0
South West African 0-10-0

South West African 0-10-0 no. 103, c. 1911

Type and origin Power type Steam Designer Henschel & Son Builder Henschel & Son Serial number D10159-D10164 Build date 1910 Total produced 6

Specifications Configuration 0-10-0 (Decapod) Gauge 3 ft 6 in (1,067 mm) Cape gauge Coupled dia. 48 in (1,219 mm) Frame type Plate Total weight 74 LT (75,190 kg) Fuel type Coal Firebox type Round-top  • Firegrate area 20.5 sq ft (1.90 m^2) Boiler: ​  • Small tubes 223: 1 ^13⁄16 in (46 mm) Boiler pressure 171 psi (1,179 kPa) Heating surface 1,206 sq ft (112.0 m^2) Cylinders Two Cylinder size 18 ^1⁄2 in (470 mm) bore 20 ^5⁄8 in (524 mm) stroke Valve gear Heusinger Valve type Slide Couplers Buffers-and-chain

Performance figures Tractive effort 16,220 lbf (72.2 kN) @ 75%

Career Operators Lüderitzbucht Eisenbahn Number in class 6 Numbers LE 101-106 Delivered 1911 First run 1911

The South West African 0-10-0 of 1911 was a steam locomotive from the Deutsch-Südwest-Afrika era.

In 1911, the Lüderitzbucht Eisenbahn (Lüderitzbucht Railway) in Deutsch-Südwest-Afrika (German South West Africa) placed six locomotives with a 0-10-0 Decapod type wheel arrangement in service. They were no longer in service when all railways in the territory came under the administration of the South African Railways in 1922.^[1][2]

Manufacturer

Six locomotives with a 0-10-0 Decapod type wheel arrangement were built in 1910 by Henschel & Son of Kassel in Germany, for a French Colony in Africa. The engines were rejected by French inspectors, however, and they were purchased by the German government for £2,000 each in 1911, on behalf of the Lüderitzbucht-Gesellschaft company who leased the Lüderitzbucht Eisenbahn and shared the profits with the government.^[1][3]

Characteristics

The locomotive had flat "D" type sliding valves which were actuated by Heusinger valve gear, with Laird type crossheads with single slide bars. To protect the motion from wind-blown sand in the Namib Desert, it had plate shields arranged along the full length of the engine, hinged on the running board to allow access to the motion.^[1][2]

The engine was built on a ³⁄₄ inch (19 millimetres) thick plate frame, strengthened with 1 ¹⁄₄ inches (32 millimetres) stretchers. It had coupled wheels of 48 inches (1,219 millimetres) diameter and cylinders of 18 ¹⁄₂ inches (470 millimetres) bore and 20 ⁵⁄₈ in (524 mm) stroke. The total weight of the engine and tender in full working order was 74 long tons (75,190 kilograms) and it had a tractive effort of 16,220 pounds-force (72.2 kilonewtons) at 75% of boiler pressure.^[1][2]

Even though the engines were popular with the enginemen, they were not economical in operation. Owing to their light construction, they were allowed to take only three-quarters of their full load. Their wheel arrangement, without leading or trailing wheels, was more suitable for yard work at slow speeds than for mainline working. To allow side-play in curves, the axle boxes of the leading and trailing coupled wheels had no inside flanges. According to one report, their utilisation as mainline engines rapidly resulted in the development of excessive side-play, to the extent that the tyres eventually cut into the spring hangers.^[1]

Service

The locomotives were numbered in the range from 101 to 106 and were placed in service on the Südbahn line from Lüderitzbucht via Seeheim to Kalkfontein, where they formed the mainstay of motive power. None of these engines survived the First World War.^[1][2]

References

1. Espitalier, T.J.; Day, W.A.J. (1948). The Locomotive in South Africa - A Brief History of Railway Development. Chapter VII - South African Railways (Continued). South African Railways and Harbours Magazine, January 1948. pp. 31-32.
2. 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. 380. ISBN 9 780620 512282.
3. Henschel-Lieferliste (Henschel & Son works list), compiled by Dietmar Stresow.