The reference for locomotives and railcars


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Czechoslovak State Railways class 556.0
Czechoslovakia | 1951 | 510 produced
556.0506 in May 1979 in Gmünd, Lower Austria
556.0506 in May 1979 in Gmünd, Lower Austria
Michel Huhardeaux

For the increased demands in freight traffic after the end of the war, a total of 510 freight locomotives were made by Škoda, which had the same boiler as the 4-8-2 locomotives of the class 475.1. All the modern achievements of steam locomotive engineering were used, such as a boiler pressure of 18 bars, Kylchap blast pipe, stoker, roller bearings and more. The result was a locomotive with a low axle load that was still able to pull freight trains weighing 3,000 tonnes in flat country tests. In practice, two locomotives pulled coal trains weighing up to 4,000 tonnes and they sometimes had to assist in front of express trains in the mountains. They were also used in neighboring countries and in 1983 were the last regular steam locomotives operating in Czechoslovakia.

Axle config2-10-0 (Decapod) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length79 ft 8 11/16 in
Wheelbase30 ft 2 3/16 in
Fixed wheelbase21 ft 7 13/16 in
Total wheelbase63 ft 5 7/16 in
Service weight218,257 lbs
Adhesive weight185,188 lbs
Total weight407,634 lbs
Axle load37,038 lbs
Water capacity9,246 us gal
Fuel capacity33,069 lbs (coal)
Power sourcesteam
Indicated power2,172 hp (1,620 kW)
Optimal speed28 mph
Top speed50 mph
Starting effort49,059 lbf
Power Plant
Driver diameter55.1 in
Boiler pressure261 psi
Expansion typesimple
Cylinderstwo, 21 5/8 x 26 in
Grate area46.7 sq ft
Firebox area260.5 sq ft
Tube heating area1,903.1 sq ft
Evaporative heating area2,163.5 sq ft
Superheater area809.4 sq ft
Total heating area2,973 sq ft
Calculated Values
steam locomotive
last changed: 04/2023

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