NWE Nos. 6 and 7

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
Gauge 1,000 mm
Length over buffers 7,734 mm
Height 3,650 mm
Width 2,500 mm
Overall wheelbase 2,500 mm
Empty weight 26 t
Service weight 32 t
Adhesive weight 32 t
Top speed 30 km/h
Indicated Power 280 kW (380 PS);
220 kW (300 PS) *
Starting tractive effort 76.0 kN (7.8 Mp),
65.9 kN (6.7 Mp) *
Driving wheel diameter 800 mm
Valve gear Heusinger with Kuhn slide
No. of cylinders 2
Cylinder bore 430 mm, 400 mm *
Piston stroke 400 mm
Boiler Overpressure 14 bar, 1.4 MPa
No. of heating tubes 88; 173 *
No. of smoke tubes 18; 0 *
Grate area 1.4 m²; 1.5 m² *
Radiative heating area 4.76 m²; 5.06 m² *
Superheater area 18.30 m²; 0 *
Evaporative heating area 51.36 m²; 69.65 m²
Water capacity 4,0 m³
Fuel 1.1 t coal
Parking brake counterweight handbrake (Wurfhebel-Handbremse)
Train brakes Knorr m. Z.
Couplers buffer and chain coupler (Balancierhebelkupplung)
* No. 7 / 99 6102

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.

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.

Only 99 6101 is currently in working order.

99 6101 takes on water
99 6101 heading a heritage train

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