The reference for locomotives and railcars


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Belgian Railway type 12
Belgium | 1939 | 6 produced
No. 2003 in Schaerbeek on a postcard from 1962
No. 2003 in Schaerbeek on a postcard from 1962

In 1939, the Belgian State Railways ordered Cockerill to build six streamlined Atlantics to speed up express trains between Brussels and Ostend. While this wheel arrangement was already unusual at the time, the inside cylinders with outside valve gear were also unusual. With a maximum permitted speed of 140 km/h, trial runs reached 165 km/h, while the trains often exceeded an average of more than 110 km/h. Average speeds of 120.46 km/h from station to station were also achieved, which is still the European record for steam trains to this day. When the route for which the locomotives were built was electrified, they were used on other routes. They were decommissioned by 1962 and road number 12 004 is now in the “Train World” in Schaerbeek.

Axle config4-4-2 (Atlantic) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length69 ft 6 1/4 in
Wheelbase32 ft 5 3/8 in
Fixed wheelbase7 ft 6 9/16 in
Total wheelbase57 ft 5 3/4 in
Service weight196,211 lbs
Adhesive weight100,972 lbs
Axle load52,029 lbs
Water capacity6,340 us gal
Fuel capacity17,637 lbs (coal)
Power sourcesteam
Indicated power2,467 hp (1,840 kW)
Optimal speed58 mph
Top speed87 mph
Starting effort27,175 lbf
Power Plant
Driver diameter82.7 in
Boiler pressure261 psi
Expansion typesimple
Cylinderstwo, 18 7/8 x 28 3/8 in
Grate area40 sq ft
Evaporative heating area1,728.7 sq ft
Superheater area678.1 sq ft
Total heating area2,406.8 sq ft
Calculated Values
steam locomotive
last changed: 07/2023

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