The Nordhausen-Wernigerode Railway Company incorporated twelve Mallet locomotives into its fleet as Numbers 11 to 22. In 1950 the remaining locomotives were renumbered as Class 99.590 by the Deutsche Reichsbahn.
Quick Facts NWE Nos. 11–22 Class 99.590, Type and origin ...
NWE Nos. 11–22 Class 99.590 |
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99 5902 (left) and 99 5901 (right) at Wernigerode, 2014 |
Type and origin |
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Builder | Arnold Jung and Meckl. Masch.- u. Waggonbau AG Güstrow (MWG) |
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Build date | 1897–1901 |
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Total produced | 12 |
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Specifications |
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• German | K 44.9 |
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Gauge | 1,000 mm (3 ft 3+3⁄8 in) metre gauge |
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Driver dia. | 1,000 mm (39.37 in) |
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Wheelbase: | |
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• Bogie | 1,400 mm (55 in) |
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• Overall | 4,600 mm (15 ft 1+1⁄8 in) |
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Length:
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• Over beams | 8,875 mm (29 ft 1+3⁄8 in) |
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Width | 2,600 mm (8 ft 6+3⁄8 in) |
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Height | 3,900 mm (12 ft 9+1⁄2 in) |
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Axle load | 8.5 t (8.4 long tons; 9.4 short tons) |
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Adhesive weight | 34 t (33 long tons; 37 short tons) |
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Empty weight | 28 t (28 long tons; 31 short tons) |
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Service weight | 34 t (33 long tons; 37 short tons) |
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Fuel capacity | 1.5 t (1.5 long tons; 1.7 short tons) coal |
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Water cap. | 5 m3 (180 cu ft) |
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Boiler:
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No. of heating tubes | 133 |
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Boiler pressure | 14 bar (1.4 MPa; 200 psi) |
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Heating surface: | |
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• Firebox | 1.39 m2 (15.0 sq ft) |
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• Radiative | 5.24 m2 (56.4 sq ft) |
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• Evaporative | 61.34 m2 (660.3 sq ft) |
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Cylinders | 4 |
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High-pressure cylinder | 285 mm (11.22 in) |
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Low-pressure cylinder | 425 mm (16.73 in) |
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Piston stroke | 500 mm (19.69 in) |
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Cylinder pressure | high pressure 14 bar (1.4 MPa; 200 psi), low pressure 5 bar (500 kPa; 73 psi), with starting valve (Anfahrventil) max 7 bar (700 kPa; 100 psi) |
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Valve gear | Heusinger |
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Parking brake | Counterweight handbrake |
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Couplers | Equalising lever coupler [de] |
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Performance figures |
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Maximum speed | 30 km/h (19 mph) |
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Indicated power | 255 PS (188 kW; 252 hp) |
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Tractive effort:
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• Starting | 55.79 kN (12,540 lbf) |
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Career |
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Numbers | NWE Nos. 11–22 99 5901–5905 |
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Retired | see text |
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