The reference for locomotives and railcars
German Reichsbahn class 06
Germany | 1939 | 2 produced
Krupp works photo
Krupp works photo
DeGolyer Library, Southern Methodist University

For particularly heavy express trains on mountainous routes, two prototypes of the class 06 were built in 1939 as the only German steam locomotive with a 4-8-4 wheel arrangement. They got the boiler of the class 45 and streamlined cladding. As with the 45, the boiler with the overly long tubes caused problems. There were also occasional derailments in narrow switches. Due to the Second World War, there was no series production and after the end of the war, no revised machines were built due to a lack of demand.

Axle config4-8-4 (Northern) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length87 ft 0 1/8 in
Wheelbase47 ft 8 1/16 in
Fixed wheelbase22 ft 1 3/4 in
Total wheelbase73 ft 7 7/8 in
Empty weight286,160 lbs
Service weight312,615 lbs
Adhesive weight176,370 lbs
Total weight496,921 lbs
Axle load44,092 lbs
Water capacity10,039 us gal
Fuel capacity22,046 lbs (coal)
Power sourcesteam
Indicated power2,763 hp (2,060 kW)
Optimal speed32 mph
Top speed87 mph
Starting effort55,805 lbf
Power Plant
Driver diameter78.7 in
Boiler pressure290 psi
Expansion typesimple
Cylindersthree, 20 1/2 x 28 3/8 in
Grate area54.3 sq ft
Firebox area202.4 sq ft
Tube heating area2,908.6 sq ft
Evaporative heating area3,111 sq ft
Superheater area1,426.2 sq ft
Total heating area4,537.2 sq ft
Calculated Values
steam locomotive
last changed: 02/2023

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