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German Federal Railway class 10
Germany | 1957 | 2 produced
10 001 on a works photo
10 001 on a works photo
Krupp

The two class 10 units that were built were express locomotives that were built for the Bundesbahn in 1957 and represented the high point in the development of steam locomotives. Although they performed well and had an image-enhancing appearance, due to the structural change it remained with the two prototypes and a service life of only eleven years.

According to the time, a welded boiler was used as in other new steam locomotives and the frame was no longer designed as a bar frame, but also made of welded sheet metal. The 10 001 was initially fired with coal via a mechanical stoker, supported by additional oil firing. The 10 002 was equipped with an oil main firing ex works and the first example was later converted to it. In contrast to earlier streamlined locomotives, the machines were not completely clad, but only received partial cladding in the lower area and a pointed smoke box door. In some cases, power ratings reach up to 3,000 hp and the consumption figures were better than with all other steam locomotives. However, the disadvantage of this powerful construction was that the axle load reached 22.8 tonnes and was therefore too high for a large part of the lines at that time.

As a result, there were only a few opportunities for the class 10 to show its full power potential. Although diesel locomotives were still less powerful at that time and the electrification of routes in many parts of Germany was not yet very advanced, the steam era was drawing to a close. After all, these two individual vehicles were retired in 1967 and 1968 and today only 10 001 is preserved, but not operational.

General
Built1957
ManufacturerKrupp
Axle config4-6-2 (Pacific) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length72 ft 9 7/16 in
Wheelbase41 ft 1 1/8 in
Fixed wheelbase15 ft 3 1/16 in
Total wheelbase72 ft 9 7/16 in
Empty weight240,083 lbs
Service weight262,129 lbs
Adhesive weight144,623 lbs
Axle load49,383 lbs
Water capacity10,567 us gal
Fuel capacity27,833 lbs (oil)
Power
Power sourcesteam
Indicated power2,467 hp (1,840 kW)
Optimal speed37 mph
Top speed87 mph
Starting effort42,800 lbf
Power Plant
Driver diameter78.7 in
Boiler pressure261 psi
Expansion typesimple
Cylindersthree, 18 7/8 x 28 3/8 in
Boiler
Grate area46.2 sq ft
Firebox area236.8 sq ft
Tube heating area2,092.5 sq ft
Evaporative heating area2,329.3 sq ft
Superheater area1,137.7 sq ft
Total heating area3,467.1 sq ft
Calculated Values
steam locomotive
express
streamline
last changed: 01/2022
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