South West African Zwillinge

GSWA Zwillinge 0-6-0T South West African Zwillinge 0-6-0T
Krauss picture of Zwillinge no. 73 B & A, c. 1899
Type and origin Power type Steam Builder Krauss & Company Henschel and Son L. Schwartzkopff Egestorf Maschinenbau Anstalt Humboldt Arnold Jung Model Zwillinge Build date 1899–1905 Total produced 182 pairs
Specifications Configuration: ​  • Whyte 0-6-0T  • UIC Cn2t Driver 3rd coupled axle Gauge 600 mm (1 ft 11+5⁄8 in) narrow Coupled dia. 580 mm (22.8 in) Wheelbase 1,300 mm (4 ft 3.2 in) ​  • Coupled 1,300 mm (4 ft 3.2 in) Length: ​  • Over couplers 8,200 mm (26 ft 10.8 in) pair  • Over beams 3,510 mm (11 ft 6.2 in) unit 7,200 mm (23 ft 7.5 in) pair Width 1,600 mm (5 ft 3.0 in) Height 2,700 mm (8 ft 10.3 in) Frame type Plate Adhesive weight 16,500 lb (7,500 kg) Loco weight 8,500 kg (18,700 lb) Fuel type Coal Fuel capacity 250 kg (550 lb) Water cap. 830 L (180 imp gal) Firebox: ​  • Type Round-top  • Grate area 0.3 m2 (3.2 sq ft) Boiler pressure 220 psi (1,517 kPa) Heating surface: ​  • Tubes 14.29 m2 (153.8 sq ft) Cylinders Two Cylinder size 180 mm (7.1 in) bore 240 mm (9.4 in) stroke Valve gear Stephenson Valve type Murdoch's D slide Couplers Buffers-and-chain
Performance figures Maximum speed 20 km/h (12 mph) Power output 60 hp (45 kW) Tractive effort 12.2 kN (2,700 lbf) @ 60%
Career Operators Swakopmund-Windhuk Staatsbahn South African Railways Number in class 50+ pairs Nicknames Zwillinge or Illinge Delivered 1898–1905 First run 1898
1. Data for single engine unless indicated otherwise. 2. The total production of 182 pairs includes those built for use in other parts of the world.

The South West African Zwillinge 0-6-0T of 1898 was a narrow gauge steam locomotive from the German South West Africa era.

Between 1898 and 1905, more than fifty pairs of Zwillinge twin 0-6-0T steam locomotives were delivered to the Swakopmund-Windhuk Staatsbahn (Swakopmund-Windhoek State Railway) in German South West Africa. By 1922, only two of these locomotives remained to be taken onto the roster of the South African Railways.^[1][2]