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Prussian S 10
German Reichsbahn class 170-1
Germany | 1910 | 202 produced
17 076 in the black livery of the Reichsbahn
17 076 in the black livery of the Reichsbahn

This was the first of the Prussian 4-6-0 express locomotives, which were grouped together in the class S 10. It was created in the first decade of the 20th century, since the locomotives built up to then with the wheel arrangement 4-4-0 or 4-4-2 were no longer able to cope with the increased requirements and a six-coupled express locomotive was therefore required. The basis was the 100 km/h passenger locomotive P 8, which had the same wheel arrangement and roughly the same dimensions. The new locomotive received the same boiler, but in a reinforced design, which allowed the pressure to be increased from 12 to 14 bars. The diameter of the coupled wheels had been increased from 1,750 to 1,980 mm in order to increase the possible cruising speed.

A distinctive feature was the engine, which had four cylinders, but only simple steam expansion. The reason for this was the significantly smoother running of four-cylinder locomotives compared to two-cylinder ones. The greatest disadvantage of this engine was the fuel consumption, which was noticeably higher than that of the S 101 with a compound engine that was introduced a short time later. This actually made the S 10 one of the most uneconomical Prussian locomotives. With the originally used 2'2' T 21.5 tender, the range was correspondingly short, which is why the considerably larger 2'2' T 31.5 was later used.

Nevertheless, production of the S 10 continued at the same time as the S 101, so that the Prussian State Railways received a total of 202 unis until 1914. Another five slightly weaker locomotives were delivered to the Lübeck-Büchener Eisenbahn and were also designated S 10 there. The Reichsbahn took over 135 units, which were given the designation 17 001 to 17 135. Six had already been handed over to the Lithuanian State Railways in 1920. Due to the high consumption, all but three locomotives were finally retired by 1935. These three continued to be used as brake locomotives until the last of them was also retired in 1954.

Variantwith Tender pr 2'2' T 21,5with Tender pr 2'2' T 31,5
General
Built1910-1914
ManufacturerBMAG
Axle config4-6-0 (Ten-wheeler) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length56 ft 9 1/2 in68 ft 0 15/16 in
Wheelbase29 ft 10 1/4 in
Fixed wheelbase15 ft 5 1/16 in
Total wheelbase54 ft 0 1/16 in
Service weight170,858 lbs
Adhesive weight111,113 lbs
Total weight314,158 lbs
Axle load38,581 lbs
Water capacity5,680 us gal8,321 us gal
Fuel capacity15,432 lbs (coal)16,535 lbs (coal)
Power
Power sourcesteam
Indicated power1,155 hp (861 kW)
Optimal speed23 mph
Top speed68 mph
Starting effort31,484 lbf
Power Plant
Driver diameter78 in
Boiler pressure203 psi
Expansion typesimple
Cylindersfour, 16 15/16 x 24 13/16 in
Boiler
Grate area30.8 sq ft
Firebox area157.2 sq ft
Tube heating area1,674.9 sq ft
Evaporative heating area1,832 sq ft
Superheater area662 sq ft
Total heating area2,494 sq ft
Calculated Values
steam locomotive
express
last changed: 01/2022
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