Prussian P 4

Prussian P 4
Quantity:	1
Manufacturer:	Henschel
Year(s) of manufacture:	1898
Retired:	1921
Wheel arrangement:	4-4-0
Axle arrangement:	2'B h2
Type:	P 24.45
Gauge:	1,435 mm (4 ft 8 1⁄2 in)
Length over buffers:	16,411 mm
Overall wheelbase:	7,400 mm
Empty weight:	44.6 t
Service weight:	49.1 t
Adhesive weight:	31.0 t
Axle load:	15.5 t
Top speed:	90 km/h
Indicated Power:	675 kW (900 PS)
Coupled wheel diameter:	1,750 mm
Carrying wheel diameter:	1,000 mm
No. of cylinders:	2
Cylinder bore:	460 mm
Piston stroke:	600 mm
Boiler Overpressure:	12 bar
No. of heating tubes:	141
No. of smoke tubes:	1 fire tube
Grate area:	2.32 m²
Radiative heating area:	8.9 m²
Tube heating area:	76.2 m²
Superheater area:	21.0 m²
Evaporative heating area:	85.1 m²
Tender:	pr 3 T 15
Water capacity:	15.0 m³

The Prussian P 4 was a derivative of the P 4.1 (Hanover variant) and the second superheated steam locomotive in the world.

Design

The engine was based on that of the Class P 4.1 that had Hanomag had produced in large numbers since 1892. It had slightly larger wheels and, due to its new design, significantly fewer heating tubes. The superheater and the steam engine were entirely independent designs.

Service and preservation

In 1898 a one-off was delivered by Hanomag to the Prussian state railways. The economy of the superheated system was soon proven in 1899 by the engine during trial runs from Kassel. Apart from a short stay at Halle  the engine was assigned to Kassel as Cassel 131 and, from 1906, as P 4 Cassel 1846. In 1921, after the First World War, the engine was mothballed, along with many other machines of similar class. With its sectioned boiler the P 4 stood for a long time in the Transport and Construction Museums, part of Museum of the Present at Hamburger Bahnhof in Berlin.

See also

• Prussian state railways
• List of Prussian locomotives and railbuses

References

External links

Wikimedia Commons has media related to Prussian P 4.

• List of preserved steam locomotives in Germany
• There is a relevant English-language forum at Railways of Germany

Classes of Prussian locomotive and railcars Express train locomotives S 1 S 2 S 3 S 4 S 5.1 S 5.2 S 6 S 7 S 8 S 9 (Exp.) S 9 S 10 S 10.1 S 10.2 S 11 Passenger and express train locomotives P 1 P 2 P 3 P 3.1 P 3.2 P 4 P 4.1 P 4.2 P 6 P 7 P 8 P 10 Goods train locomotives G 1 G 2 G 3 G 4.1 G 4.2 G 4.3 G 5.1 G 5.2 G 5.3 G 5.4 G 5.5 G 7.1 G 7.2 G 7.3 G 8 G 8.1 G 8.2 G 8.3 G 9 (Mallet) G 9 G 10 G 12 (C.F.O.A) G 12 G 12.1 Tank locomotives T 0 T 1 T 2 T 2/T 4 T 2.1 T 2/T 3/T 4 T 3 T 4 T 4.1 T 4.2 T 4.3 T 5.1 T 5.2 T 6 T 7 T 8 T 9 Elberfeld T 9 Langenschwalbach T 9.1 T 9.2 T 9.3 T 10 T 11 T 12 T 13 Hagans T 13.1 T 14 T 14.1 T 14 (Exp.) T 15 T 16 (Exp.) T 16 T 16.1 T 18 T 20 T 26 T 28 Narrow gauge locomotives T 31 T 32 T 33 T 34 T 35 T 36 T 37 T 38 T 39 T 40 Electric locomotives to follow Railbuses to follow Prussian state railways