Soviet Railways series КП-4 (KP-4)
Soviet Union 1950 901 produced
After the Second World War, the Soviet Union needed a large number of narrow-gauge steam locomotives for use on forest and industrial railways with a gauge of 750 mm. As reparations, a total of 901 locomotives of the КП-4 (KP-4) series were built in Poland by Fablok. Like the similar models from East Germany, Czechoslovakia, Hungary and Finland, it was a 0-8-0 with a separate tender. For use in China, 87 were built for a gauge of 762 mm and put into class C2. 20 stayed in Poland. With the introduction of more modern locomotives, most were retired in the seventies. Today some are on static display, with a few still being operational.
Technical data
General
- Built
- 1950-1957
- Manufacturers
- Fablok
- Wheel arrangement
- 0-8-0 (Eight-coupled)
- Gauge
- 750 mm (750 mm); 762 mm (Two feet six inch)
Dimensions and weights
- Length
- 10.64 m
- Length loco
- 5.71 m
- Wheelbase
- 2.25 m
- Total wheelbase
- 8.20 m
- Empty mass
- 14 t
- Service mass
- 16 t
- Adhesion mass
- 16 t
- Total mass
- 28 t
- Rigid wheelbase
- 2.25 m
- Axle load
- 4 t
- Water capacity
- 5,200 l
- Fuel capacity
- 2 t (coal)
Boiler
- Grate area
- 1.01 m²
- Evaporative heating surface
- 37.15 m²
- Superheater surface
- 13.48 m²
- Total heating surface
- 50.6 m²
Power plant
- Driver diameter
- 600 mm
- Boiler pressure
- 13 bar
- Expansion type
- simple expansion
- Cylinders
- two, 285 x 300 mm
Power
- Power source
- steam
- Indicated power
- 132 kW (179 PS)
- Top speed
- 35 km/h
- Starting effort
- 44.9 kN
Calculated values
- Factor of adhesion
- 1 : 3.50
- Optimal speed
- 18 km/h
- Power-to-weight ratio
- 8.3 kW/t
- Adhesive weight/Total
- 1 : 1.00
- Tractive force/Heating surface
- 1 : 18.51
- Grate area/Heating surface
- 1 : 50.13
- Total/Superheater
- 1 : 2.76
