The reference for locomotives and railcars
German Reichsbahn class 23
Germany | 1941 | 2 produced
23 001 in World War II times
23 001 in World War II times

Towards the end of the 1930s there was a need for a new passenger locomotive, which led to the development of the class 23 with the axle configuration 2-6-2. It was primarily intended to replace the Prussian P 8. Since the war that had just begun saw only a need for freight locomotives and passenger traffic was severely neglected, only two examples were built. After the war, however, these served as a model for a new variant in both parts of Germany, of which just over 100 were to be built.

After experience had already been gained at the beginning of the century in Prussia with the classes P 8 and G 10 of producing a passenger and freight locomotive with the same boiler, this principle was also applied here. Around the same time, the class 50 freight locomotive was built with a 2-10-0 wheel arrangement. Thus, the same boiler was used for both. In the development of the class 23, as with the 50, some new developments were dispensed with, which would have increased the possible boiler load by heating surface. As a result, however, the number of identical parts with earlier standard locomotives remained higher and production could also be carried out more cheaply. An improvement compared to older engines was a front wall on the tender. This fulfilled the same function as a closed cab and protected the crew when reversing.

Both examples came to the Reichsbahn of the GDR after the Second World War. In 1961, road number 23 001 received a modern, welded boiler with a combustion chamber, as was used on the Rekoloks. The second engine was not converted because it had damage to the wheels and frame and was therefore retired in 1967. The remaining engine was renumbered 35 2001 in 1970 to distinguish it from the newly built post-war locos.

As already mentioned, further developments of the original 23 were made on both sides of the inner-German border after the war. The class 2310 of the DR kept almost completely to the dimensions of the prototype, but benefited from modern technical achievements and contemporary manufacturing methods. Between 1955 and 1959, 113 pieces were made at the LKM Babelsberg. In contrast, the class 23 of the DB was based on BMAG's unimplemented plans for the alternative design of the 23. 105 of this variant were built between 1950 and 1959.

Axle config2-6-2 (Prairie) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length75 ft 3 1/8 in
Wheelbase35 ft 1 1/4 in
Fixed wheelbase13 ft 5 7/16 in
Total wheelbase62 ft 4 7/16 in
Empty weight176,590 lbs
Service weight194,668 lbs
Adhesive weight118,829 lbs
Total weight326,725 lbs
Axle load39,683 lbs
Water capacity6,868 us gal
Fuel capacity17,637 lbs (coal)
Power sourcesteam
Indicated power1,479 hp (1,103 kW)
Optimal speed27 mph
Top speed68 mph
Starting effort34,887 lbf
Power Plant
Driver diameter68.9 in
Boiler pressure232 psi
Expansion typesimple
Cylinderstwo, 21 5/8 x 26 in
Grate area41.9 sq ft
Firebox area171.1 sq ft
Tube heating area1,740.5 sq ft
Evaporative heating area1,911.7 sq ft
Superheater area684.6 sq ft
Total heating area2,596.3 sq ft
Calculated Values
steam locomotive
last changed: 01/2022

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