NWE Nos. 6 and 7

NWE Nos. 6 and 7, later Class 99.610, are narrow gauge tank locomotives with a C axle arrangement that belonged to the Nordhausen-Wernigerode Railway.

NWE Nos. 6–7 Class 99.610
Number(s)	NWE Nos. 6–7 99 6101–6102
Quantity	2
Manufacturer	Henschel
Year(s) of manufacture	1914
Axle arrangement	C h2t, C n2t *
Type	K 33.11
Track gauge	1,000 mm (3 ft 3 ^3⁄8 in) metre gauge
Length over buffers	7,734 mm (25 ft 4 ^1⁄2 in)
Height	3,650 mm (11 ft 11 ^3⁄4 in)
Width	2,500 mm (8 ft 2 ^3⁄8 in)
Overall wheelbase	2,500 mm (8 ft 2 ^3⁄8 in)
Empty weight	26 t (26 long tons; 29 short tons)
Service weight	32 t (31 long tons; 35 short tons)
Adhesive weight	32 t (31 long tons; 35 short tons)
Top speed	30 km/h (19 mph)
Indicated Power	280 kW (381 PS; 375 hp); 220 kW (299 PS; 295 hp) *
Starting tractive effort	76.0 kN (7.75 Mp; 17,100 lbf), 65.9 kN (6.72 Mp; 14,800 lbf) *
Driving wheel diameter	800 mm (31.50 in)
Valve gear	Heusinger with Kuhn slide
No. of cylinders	2
Cylinder bore	430 mm (16.93 in), 400 mm (15.75 in)
Boiler Overpressure	14 bar (1.4 MPa; 200 psi)
No. of heating tubes	88; 173 *
No. of smoke tubes	18; 0 *
Grate area	1.4 m^2 (15 sq ft); 1.5 m^2 (16 sq ft) *
Radiative heating area	4.76 m^2 (51.2 sq ft); 5.06 m^2 (54.5 sq ft) *
Superheater area	18.30 m^2 (197.0 sq ft); 0 *
Evaporative heating area	51.36 m^2 (552.8 sq ft); 69.65 m^2 (749.7 sq ft)
Water capacity	40 m^3 (1,400 cu ft)
Fuel	1.1 t (1.1 long tons; 1.2 short tons) coal
Parking brake	counterweight handbrake (Wurfhebel-Handbremse)
Train brakes	Knorr m. Z.
Couplers	Equalising lever coupler (Balancierhebelkupplung)
* No. 7 / 99 6102

The two engines had been supplied to the Army Technical Research Institute (Heerestechnische Prüfungsanstalt) but were transferred in 1917 (superheated steam engine) and 1921 (saturated steam engine) to the Nordhausen-Wernigerode Railway as NWE 6 and NWE 7.

NWE 7 had previously worked as Locomotive No. 15 with the Nassau Light Railway.

Until the 1980s, both engines were used around Wernigerode by the Deutsche Reichsbahn, their last duties being in Rollbock service. The DR gave them new numbers following their nationalisation. Although they had been taken out of service, the Harz Narrow Gauge Railways took both engines over.

• Locomotive 99 6101, formerly NWE 6, now in the care of the Harz Narrow Gauge Railway Society (Interessengemeinschaft Harzer Schmalspurbahnen).
• Locomotive 99 6102, formerly NWE 7, now in the care of the Selke Valley Railway Society (Freundeskreis Selketalbahn).

Only 99 6101 is currently in working order.

• 
  99 6101 takes on water
• 
  99 6101 heading a heritage train

Literature

• Horst J. Obermayer: Taschenbuch Deutsche Schmalspur-Dampflokomotiven. Franckh, Stuttgart 1971, ISBN 3-440-03818-1
• Hans Röper, Helmut Becker, Werner Dill, Gerhard Zieglgänsberger: Die Harzquer- und Brockenbahn. 3., erweiterte Auflage, Transpress Verlagsgesellschaft, Berlin 1992 ISBN 3-344-70747-7

External links

• 99 6101 with the Selke Valley Railway Society
• 99 6102 with the Selke Valley Railway Society