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Prussian P 1
Germany | 1873 | 102 produced
No. 368 of the Mainz Directorate, a locomotive from the later series
No. 368 of the Mainz Directorate, a locomotive from the later series
Vom Glanz und Ende der K.P.E.V., Eisenbahn Journal

From 1905, the Prussian administration combined around 100 passenger locomotives with a 2-4-0 wheel arrangement as P 1, some of which had been procured from the predecessor railways. Others were created after the founding of the state railways, with a second, more powerful series already being built according to standards. Thus, this type did not include identical locomotives, but only the locomotives of the Erfurt and Essen subdivisions. Similar locomotives from other directorates also became the P 2 and P 3 in 1905.

The most numerous model of the P 1 was the Ruhr-Sieg type, of which the Bergisch-Märkische Eisenbahn had 34 engines manufactured between 1873 and 1882. The Prussian State Railways had them built in the same form from 1885, and then in a more powerful, standardized form from 1889. A total of 90 of these types were built by 1891. A special feature of this type was the leading axle, which could be moved laterally thanks to a bissel frame, which, strictly speaking, led to the UIC axle formula 1'B. The drivers had a diameter of 1,580 mm and allowed a top speed of 70 km/h, which was sufficient for passenger trains at the time. Some engines had 1,730 mm wheels and could reach 90 km/h.

The first series had no brakes themselves, but only used the brakes of the tender. Only in the case of the locomotives built according to standard were the coupling wheels also braked. From 1885 there was a conversion to air brakes, which braked the tender and the rest of the train.

Although the procurement period for the P 1 lasted a long time, decommissioning began as early as the beginning of the twentieth century. Not a single one made it to be taken over by the Reichsbahn, the last ones were scrapped in 1926.

General
Built1873-1891
ManufacturerVulcan, Borsig, Henschel
Axle config2-4-0 (Porter) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length48 ft 5 3/4 in
Wheelbase14 ft 5 1/4 in
Fixed wheelbase8 ft 6 3/8 in
Empty weight73,855 lbs
Service weight83,776 lbs
Adhesive weight56,879 lbs
Axle load26,676 lbs
Water capacity2,774 us gal
Fuel capacity8,818 lbs (coal)
Power
Power sourcesteam
Estimated power469 hp (350 kW)
Optimal speed23 mph
Top speed43 mph
Starting effort12,878 lbf
Power Plant
Driver diameter61.8 in
Boiler pressure145 psi
Expansion typesimple
Cylinderstwo, 16 9/16 x 23 5/8 in
Boiler
Grate area18.7 sq ft
Firebox area75.3 sq ft
Tube heating area898.8 sq ft
Evaporative heating area974.1 sq ft
Total heating area974.1 sq ft
Calculated Values
steam locomotive
passenger
last changed: 01/2022
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