The reference for locomotives and railcars


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Prussian G 43
German Reichsbahn classes 533 and 5377
Germany | 1903 | 63 produced
Die Lokomotive, April 1910

The last link in the series of G 3 and G 4 six-coupleds without carrying axles was the G 43, which had been developed with the aim of achieving a higher top speed. Like the G 52, it had a two-cylinder compound engine with similar cylinder dimensions. Although the diameter of the wheels was only increased by ten millimeters, the running characteristics were improved by changes to the chassis and power plant. A total of 63 units were completed by 1907, which was significantly fewer than the G 42.

Even at the time of their production, the locomotives were no longer able to cope with the loads of current freight trains in the more densely populated regions of Prussia. With a speed of now 60 km/h, however, they offered themselves for mixed service in the eastern parts of the country, where there were not such heavy loads to be moved and the speed was sufficient for passenger trains. The 3 T 10.5 and 3 T 12 tenders were also adequately dimensioned for this.

Nevertheless, the number of these locomotives that were not widely used fell quickly. Although only ten units had to be handed over to Poland after the First World War, the renumbering plan included only 39 units of the locomotives now known as the class 533. 14 of these had already disappeared by the time they were actually renumbered in 1925. During the Second World War, three of the engines listed as Th4 in Poland came back to the Reichsbahn. Since the other G 54s had already been decommissioned by the Reichsbahn at the end of the 1920s, these three were used for a short time with the different numbering from 53 7751 to 7753.

ManufacturerUnion Königsberg
Axle config0-6-0 (Six-coupled) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length50 ft 4 13/16 in
Wheelbase12 ft 1 11/16 in
Fixed wheelbase12 ft 1 11/16 in
Total wheelbase34 ft 8 15/16 in
Service weight102,956 lbs
Adhesive weight102,956 lbs
Axle load35,274 lbs
Water capacity2,774 us gal
Fuel capacity8,818 lbs (coal)
Power sourcesteam
Estimated power536 hp (400 kW)
Optimal speed22 mph
Top speed37 mph
Starting effort15,530 lbf
with start valve18,636 lbf
Power Plant
Driver diameter53.2 in
Boiler pressure174 psi
Expansion typecompound
Cylinderstwo, HP: 18 1/8 x 24 13/16 in
and LP: 26 3/4 x 24 13/16 in
Grate area18.6 sq ft
Firebox area83.7 sq ft
Tube heating area1,267 sq ft
Evaporative heating area1,350.8 sq ft
Total heating area1,350.8 sq ft
Calculated Values
steam locomotive
last changed: 09/2022

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