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Nordhausen-Wernigerode Railway No. 51 and 52
The Nordhausen-Wernigeroder Eisenbahn, better known for the Brocken Railway in the Harz mountains, got two Mallets from Borsig in 1922 and 1924. They had a 2-4-4-2 wheel arrangement and were fairly heavy for meter gau...
| Nordhausen-Wernigerode Railway No. 51 and 52Remove | |
|---|---|
| Variant | Standard |
| Built | 1922, 1924 |
| Manufacturers | Borsig |
| Wheel arrangement | (1B)B1 t ma |
| Gauge | 1000 mm |
| Length | 10350 mm |
| Service mass | 53000 kg |
| Top speed | 30 km/h |
| Power | |
| Engine |
General
| Property | Nordhausen-Wernigerode Railway No. 51 and 52 Standard Remove |
|---|---|
| Built | 1922, 1924 |
| Manufacturers | Borsig |
| Wheel arrangement | 2-4-4-2T (Skookum (Mallet)) |
| Gauge | 1,000 mm |
Dimensions and weights
| Property | Nordhausen-Wernigerode Railway No. 51 and 52 Standard Remove |
|---|---|
| Length | 10.35 m |
| Wheelbase | 7.80 m |
| Empty mass | 43.5 t |
| Service mass | 53 t |
| Adhesion mass | 39 t |
| Rigid wheelbase | 1.30 m |
| Axle load | 9.8 t |
| Water capacity | 6,000 l |
| Fuel capacity | 2.5 t (coal) |
Boiler
| Property | Nordhausen-Wernigerode Railway No. 51 and 52 Standard Remove |
|---|---|
| Grate area | 1.99 m² |
| Evaporative heating surface | 85.89 m² |
| Superheater surface | 22 m² |
| Total heating surface | 107.9 m² |
Power plant
| Property | Nordhausen-Wernigerode Railway No. 51 and 52 Standard Remove |
|---|---|
| Driver diameter | 850 mm |
| Boiler pressure | 14 bar |
| Expansion type | compound |
| Cylinders | four, HP: 360 x 400 mm and LP: 560 x 400 mm |
Power
| Property | Nordhausen-Wernigerode Railway No. 51 and 52 Standard Remove |
|---|---|
| Power source | steam |
| Indicated power | 480 kW (653 PS) |
| Top speed | 30 km/h |
| Starting effort | 102.7 kN |
| Starting effort simple | 123.2 kN |
Calculated values
| Property | Nordhausen-Wernigerode Railway No. 51 and 52 Standard Remove |
|---|---|
| Factor of adhesion | 1 : 3.73 |
| Optimal speed | 29 km/h |
| Power-to-weight ratio | 9.1 kW/t |
| Adhesive weight/Total | 1 : 1.36 |
| Tractive force/Heating surface | 1 : 19.88 |
| Grate area/Heating surface | 1 : 54.22 |
| Total/Superheater | 1 : 3.90 |
