Dunderland Iron Ore Company No. A3 and A4
Norwegian State Railways type 54a
Norway 1902 2 produced
Four tank locomotives were ordered for the opening of the Dunderlandsbane by the British mining company DIOC, of which the two larger ones came from Kerr, Stuart & Co. They had the wheel arrangement 2-6-2T and were adapted to the climate in Norway with a closed cab. When the Dunderlandsbane was integrated into the NSB network in 1947, these locomotives were also taken over. They now became the Type 54a, the last of which was in service until 1957.
Technical data
General
- Built
- 1902
- Manufacturers
- Kerr, Stuart & Co.
- Wheel arrangement
- 2-6-2T (Prairie)
- Gauge
- 1,435 mm (Standard gauge)
Dimensions and weights
- Length
- 10.05 m
- Wheelbase
- 6.71 m
- Empty mass
- 35.5 t
- Service mass
- 50 t
- Adhesion mass
- 39 t
- Axle load
- 13 t
- Water capacity
- 7,412 l
Boiler
- Grate area
- 1.44 m²
- Evaporative heating surface
- 79.293 m²
- Total heating surface
- 79.3 m²
Power plant
- Driver diameter
- 991 mm
- Boiler pressure
- 11 bar
- Expansion type
- simple expansion
- Cylinders
- two, 406 x 508 mm
Power
- Power source
- steam
- Estimated power
- 242 kW (329 PS)
- Top speed
- 40 km/h
- Starting effort
- 79.4 kN
Calculated values
- Factor of adhesion
- 1 : 4.82
- Optimal speed
- 19 km/h
- Power-to-weight ratio
- 4.8 kW/t
- Adhesive weight/Total
- 1 : 1.28
- Tractive force/Heating surface
- 1 : 20.92
- Grate area/Heating surface
- 1 : 55.06
