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
Quantity2
ManufacturerHenschel
Year(s) of manufacture1914
Axle arrangementC h2t, C n2t *
TypeK 33.11
Track gauge1,000 mm (3 ft 3 3⁄8 in) metre gauge
Length over buffers7,734 mm (25 ft 4 1⁄2 in)
Height3,650 mm (11 ft 11 3⁄4 in)
Width2,500 mm (8 ft 2 3⁄8 in)
Overall wheelbase2,500 mm (8 ft 2 3⁄8 in)
Empty weight26 t (26 long tons; 29 short tons)
Service weight32 t (31 long tons; 35 short tons)
Adhesive weight32 t (31 long tons; 35 short tons)
Top speed30 km/h (19 mph)
Indicated Power280 kW (381 PS; 375 hp);
220 kW (299 PS; 295 hp) *
Starting tractive effort76.0 kN (7.75 Mp; 17,100 lbf),
65.9 kN (6.72 Mp; 14,800 lbf) *
Driving wheel diameter800 mm (31.50 in)
Valve gearHeusinger with Kuhn slide
No. of cylinders2
Cylinder bore430 mm (16.93 in),
400 mm (15.75 in)
Boiler Overpressure14 bar (1.4 MPa; 200 psi)
No. of heating tubes88; 173 *
No. of smoke tubes18; 0 *
Grate area1.4 m2 (15 sq ft);
1.5 m2 (16 sq ft) *
Radiative heating area4.76 m2 (51.2 sq ft);
5.06 m2 (54.5 sq ft) *
Superheater area18.30 m2 (197.0 sq ft);
0 *
Evaporative heating area51.36 m2 (552.8 sq ft);
69.65 m2 (749.7 sq ft)
Water capacity40 m3 (1,400 cu ft)
Fuel1.1 t (1.1 long tons; 1.2 short tons) coal
Parking brakecounterweight handbrake (Wurfhebel-Handbremse)
Train brakesKnorr m. Z.
CouplersEqualising 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
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