Prussian S 4

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The Prussian S 4's were German superheated express steam locomotives with the Prussian state railways, later grouped as DRG Class 13.5 in the Deutsche Reichsbahn. They were an evolutionary development of the Prussian S 3. The first locomotive was built in 1898 by Vulcan, Stettin as a modified S 3. She was the first superheated locomotive in the world.[1] She was initially designated as Hannover 74 and towards the end as the S 4 Cassel 401. Two further trials locomotives appeared in 1899 and 1900 as Hannover 86 and Berlin 74 also classed as S 3's. They were later reclassified as S 4's Hannover 401 and Posen 401.[1]

Prussian S 4
DRG Class 13.5, 13.4
Type and origin
Builder
Build date1902–1909
Total produced104
Specifications
Configuration:
 • Whyte4-4-0
 • GermanS 24.16
Gauge1,435 mm (4 ft 8+12 in)
Leading dia.1,000 mm
Driver dia.1,980 mm
Length:
 • Over beams18,210 mm
Axle load16.0 t
Adhesive weight31.9 t
Service weight50.2 t
Water cap.13.0/15.0/16.0 m3
Boiler:
No. of heating tubes115
No. of smoke tubes18
Heating tube length4,300 mm
Boiler pressure12 bar
Heating surface:
 • Firebox2.32 m2
 • Radiative10.65 m2
 • Evaporative117.70 m2
Cylinders2
Cylinder size540 mm
Piston stroke600 mm
Valve gearWalschaerts (Heusinger, outside)
Performance figures
Maximum speed100 km/h
Indicated power736 kW
Career
NumbersDRG 13 501–504
Retired1927
Data for production series

Not until the teething troubles had been resolved was the S 4 put into series production in 1902 in Borsig, from 1906 also in Henschel and Humboldt.[1] Unlike the prototypes the production engines were developed independently of the S 3, and 104 examples were built in the years to 1909 when procurement was halted in favour of the Prussian S 6. Up to 1906 a smokebox superheater was installed; afterwards smoke tube superheaters were used.[1]

The S 4's star waned even before the First World War, so that within a few years most of the engines had disappeared from the tracks. The remainder were employed on passenger train or even goods train duties.

In 1923 the Deutsche Reichsbahn recorded 44 S 4's in its provisional renumbering plan as 13 501-544. But by 1925 only four of them were left. These were given running numbers 13 501–504 in 1925[1] and were retired by 1927.

After the First World War, six locomotives were given to the Polish State Railways (PKP), where they were classified as Pd2 class, numbers 1 to 6.[1] During the Second World War five S 4s came into the Reichsbahn holdings from Poland as 13 401–405.[1] Two of them were eventually given back to Poland in 1955 by the DR.

The locomotives were equipped with tenders of Prussian classes pr 2’2’ T 16, pr 3 T 13 and pr 3 T 15.

See also

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References

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  1. ^ a b c d e f g Rauter and Scheingraber (1991), pp. 84-90.

Literature

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  • Rauter, Herbert; Scheingraber, Günther (1991). Preußen-Report. Band 2: Die Schnellzuglokomotiven der Gattung S 1 - S 11 (in German). Hermann Merker Verlag. ISBN 3-922404-16-2.
  • Weisbrod, Manfred; Müller, Hans; Petznik, Wolfgang (1976). Dampflokomotiven deutscher Eisenbahnen, Baureihe 01–39 (EFA 1.1) (in German) (3rd ed.). Düsseldorf: Alba Buchverlag. pp. 77–78. ISBN 3-87094-081-6.