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Specifications
Specifications
Configuration:;
• Whyte	4-4-0
• German	S 24.16
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	1,000 mm
Driver dia.	1,980 mm
Length:;
• Over beams	18,210 mm
Axle load	16.0 t
Adhesive weight	31.9 t
Service weight	50.2 t
Water cap.	13.0/15.0/16.0 m3
Boiler:;
No. of heating tubes	115
No. of smoke tubes	18
Heating tube length	4,300 mm
Boiler pressure	12 bar
Heating surface:
• Firebox	2.32 m2
• Radiative	10.65 m2
• Evaporative	117.70 m2
Cylinders	2
Cylinder size	540 mm
Piston stroke	600 mm
Valve gear	Walschaerts (Heusinger, outside)

Type and origin
Type and origin
Builder	Borsig (40); Henschel & Sohn (54); Humboldt (10);
Build date	1902–1909
Total produced	104

Prussian S 4
DRG Class 13.5, 13.4
Prussian S 4 ; DRG Class 13.5, 13.4
Builder
Type and origin
Builder	Borsig (40); Henschel & Sohn (54); Humboldt (10);
Build date	1902–1909
Total produced	104
Configuration:;
Specifications
Configuration:;
• Whyte	4-4-0
• German	S 24.16
Gauge	1,435 mm (4 ft 8+1⁄2 in)
Leading dia.	1,000 mm
Driver dia.	1,980 mm
Length:;
• Over beams	18,210 mm
Axle load	16.0 t
Adhesive weight	31.9 t
Service weight	50.2 t
Water cap.	13.0/15.0/16.0 m3
Boiler:;
No. of heating tubes	115
No. of smoke tubes	18
Heating tube length	4,300 mm
Boiler pressure	12 bar
Heating surface:
• Firebox	2.32 m2
• Radiative	10.65 m2
• Evaporative	117.70 m2
Cylinders	2
Cylinder size	540 mm
Piston stroke	600 mm
Valve gear	Walschaerts (Heusinger, outside)
Maximum speed
Performance figures
Maximum speed	100 km/h
Indicated power	736 kW
Numbers
Career
Numbers	DRG 13 501–504
Retired	1927
	Data for production series

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]

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.

References

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

Literature

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.