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Steam
Tender Locomotives with up to Two Coupled Axles
Tender Locomotives with Three Coupled Axles
Tender Locomotives with Four and More Coupled Axles
0-8-0 „Eight-Coupled”
Austrian Southern Railway class 35a
Austrian Southern Railway class 35c
Baden VIII a
Dutch Railways series 4700
Empress Elisabeth Railway series V
French Northern Railway No. 4.001 to 4.075 and 4.636 to 4.990
Great Northern (UK) class K
Imperial Russian Railways series О
Imperial-Royal Field Railways No. 6
Imperial-Royal State Railways class 73
Lancashire & Yorkshire class 30 (Hughes)
London & North Western class A
London & North Western class B “Swami”
London & North Western class G1
New York Central class U-2
North Eastern classes T and T1
Palatinate Railways G 3 and Baden VIII b
Palatinate Railways G 4I
Palatinate Railways G 5
Paris-Lyon-Méditerranée No. 3211 to 3362 and Paris-Lyon-Méditerranée 4 B
Pennsylvania class C1
Prussian G 71
Prussian G 72
Prussian G 8
Prussian G 81
Prussian G 9
Soviet Railways series ГР
Soviet Railways series КП-4
Soviet Railways series КЧ-4
Swedish State Railways EII
Upper-Italian Railway class 1200
US Railroad Administration 0-8-0
Wabash classes C-1 to C-4
2-8-0 “Consolidation”
2-8-2 “Mikado”
4-8-0 “Twelve-wheeler”
4-8-2 “Mountain”
2-8-4 “Berkshire”
4-8-4 “Northern”
0-10-0 “Ten-coupled”
2-10-0
2-10-2 “Santa Fé”
2-10-4 “Texas”
4-10-0 “Mastodon” and 4-10-2 “Reid Ten-wheeler”
Six or seven coupled axles
Tank Locomotives up to Two Coupled Axles
Tank Locomotives with Three Coupled Axles
Tank Locomotives Four and More Coupled Axles
Articulated and Bogie
Special Types
Electric
Diesel
Railcars and Multiple Units
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Soviet Railways series КП-4
go back
Soviet Union | 1950
901 produced
КП-4 No. 3772 of the Bieszczady forest railway in July 2018 at Majdan station
КП-4 No. 3772 of the Bieszczady forest railway in July 2018 at Majdan station
Michal Derela

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. So far there is only a short text for this vehicle. In the future it will be described in more detail.

General
Built1950-1957
ManufacturerFablok
Axle config0-8-0 (Eight-coupled) 
Gauge2 ft 5 1/2 in, 2 ft 6 in (Two feet six inch)
Dimensions and Weights
Length34 ft 11 1/16 in
Length loco18 ft 8 7/8 in
Wheelbase7 ft 4 9/16 in
Rigid wheelbase7 ft 4 9/16 in
Total wheelbase26 ft 10 13/16 in
Empty weight30,865 lbs
Service weight35,274 lbs
Adhesive weight35,274 lbs
Total weight61,729 lbs
Axle load8,818 lbs
Water capacity1,374 us gal
Fuel capacity4,409 lbs (coal)
Boiler
Grate area10.9 sq ft
Evaporative heating area399.9 sq ft
Superheater area145.1 sq ft
Total heating area545 sq ft
Power Plant
Driver diameter23.62 in
Boiler pressure188 psi
Expansion typesimple
Cylinderstwo, 11 1/4 x 11 13/16 in
Power
Power sourcesteam
Indicated power177 hp (132 kW)
Top speed22 mph
Starting effort10,085 lbf
Calculated Values
Optimal speed11 mph
steam locomotive
freight
passenger
narrow gauge
last changed: 02/2025
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