The reference for locomotives and railcars


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Nordhausen-Wernigerode Railway No. 21II
German Reichsbahn 99 6001
Germany | 1939 | only one produced
99 6001 in April 2012 in Mägdesprung
99 6001 in April 2012 in Mägdesprung

In the 1930s, several narrow-gauge railways in the Harz Mountains ordered a series of steam locomotives with different wheel arrangements from Krupp, which had been developed according to standardized design principles. Although they looked similar to the standard locomotives of the Reichsbahn, there were some deviations from them. One of these locomotives was number 21II of the Nordhausen-Wernigerode railway, which was only built once because of the Second World War. It is one of the fastest narrow-gauge locomotives in Germany and is still in use today on the Harz narrow-gauge railways. It has been on the road with a new boiler since 2014.

Axle config2-6-2T (Prairie) 
Gauge3 ft 3 3/8 in (Meter gauge)
Dimensions and Weights
Length29 ft 1 7/16 in
Wheelbase19 ft 10 9/16 in
Fixed wheelbase7 ft 10 1/2 in
Empty weight83,423 lbs
Service weight104,896 lbs
Adhesive weight66,139 lbs
Axle load22,046 lbs
Water capacity1,321 us gal
Fuel capacity4,409 lbs (coal)
Power sourcesteam
Indicated power536 hp (400 kW)
Optimal speed14 mph
Top speed31 mph
Starting effort23,600 lbf
Power Plant
Driver diameter39.4 in
Boiler pressure203 psi
Expansion typesimple
Cylinderstwo, 16 9/16 x 19 11/16 in
Grate area16.8 sq ft
Firebox area79.2 sq ft
Tube heating area775 sq ft
Evaporative heating area854.2 sq ft
Superheater area271.3 sq ft
Total heating area1,125.5 sq ft
Calculated Values
steam locomotive
narrow gauge
tank locomotive
last changed: 04/2023

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