The reference for locomotives and railcars


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Polish State Railways Ok22
Poland | 1923 | 190 produced
Ok22-31 exhibited as a memorial
Ok22-31 exhibited as a memorial
Rainer Haufe
ManufacturerHanomag, Fablok
Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length61 ft 0 3/4 in
Empty weight158,292 lbs
Service weight173,945 lbs
Adhesive weight112,436 lbs
Total weight287,482 lbs
Axle load37,479 lbs
Water capacity5,680 us gal
Fuel capacity22,046 lbs (coal)
Power sourcesteam
Estimated power1,207 hp (900 kW)
Optimal speed28 mph
Top speed62 mph
Starting effort27,286 lbf
Power Plant
Driver diameter68.9 in
Boiler pressure174 psi
Expansion typesimple
Cylinderstwo, 22 5/8 x 24 13/16 in
Grate area43.2 sq ft
Firebox area151.8 sq ft
Tube heating area1,251.8 sq ft
Evaporative heating area1,403.6 sq ft
Superheater area556.5 sq ft
Total heating area1,960.1 sq ft
Calculated Values
steam locomotive
last changed: 08 2023

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