NWE Nos. 11 to 22

Specifications
Specifications
• German	K 44.9
Gauge	1,000 mm (3 ft 3+3⁄8 in) metre gauge
Driver dia.	1,000 mm (39.37 in)
Wheelbase:
• Bogie	1,400 mm (55 in)
• Overall	4,600 mm (15 ft 1+1⁄8 in)
Length:;
• Over beams	8,875 mm (29 ft 1+3⁄8 in)
Width	2,600 mm (8 ft 6+3⁄8 in)
Height	3,900 mm (12 ft 9+1⁄2 in)
Axle load	8.5 t (8.4 long tons; 9.4 short tons)
Adhesive weight	34 t (33 long tons; 37 short tons)
Empty weight	28 t (28 long tons; 31 short tons)
Service weight	34 t (33 long tons; 37 short tons)
Fuel capacity	1.5 t (1.5 long tons; 1.7 short tons) coal
Water cap.	5 m3 (180 cu ft)
Boiler:;
No. of heating tubes	133
Boiler pressure	14 bar (1.4 MPa; 200 psi)
Heating surface:
• Firebox	1.39 m2 (15.0 sq ft)
• Radiative	5.24 m2 (56.4 sq ft)
• Evaporative	61.34 m2 (660.3 sq ft)
Cylinders	4
High-pressure cylinder	285 mm (11.22 in)
Low-pressure cylinder	425 mm (16.73 in)
Piston stroke	500 mm (19.69 in)
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)
Valve gear	Heusinger
Parking brake	Counterweight handbrake
Couplers	Equalising lever coupler

Type and origin
Type and origin
Builder	Arnold Jung and Meckl. Masch.- u. Waggonbau AG Güstrow (MWG)
Build date	1897–1901
Total produced	12

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

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.