Prussian State 2-4-0 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class P 1 (Locobase 6344)

Data from Christian Lindecke's website [] (visited 14 November 2004); "Die Bezeichnung der preussischen Lokomotiven" on the BeitrSge zur Lokomotiv- und Eisenbahngeschichte website (compiled by Ingo Hutter) at []; and "Preu_ische P 1" in Wikipedia at [], last accessed 24 October 2022.

Hutter's "Beitrage ..." contains a table of all Prussian State locomotives given type numbers in 1906. Locobase converted the HTML information to an Excel table in order to separate the quantities delivered to predecessor railways from the number given P1 numbers. The result: The 100 P1s on the roster in 1906 came from 702 2-4-0s possessing at least similar specifications and delivered over the previous 40 years.


Class P2 (Locobase 4923)

Data from "Prussian P 2" in Wikipedia at [], last accessed 18 January 2023.

The Prussian Minister for State Works convened an eight-day meeting in 1874 with head engineers of several German railroads and arrived at two "Standard" designs --a 2-4-0 for passenger work and an 0-6-0 for freight operations. These Personenzug-

schlepptenderlok were speed-rated at 70-90 kph (43.5-56 mph).


Class P3.1 / 34.7 (Locobase 713)

See Christian Lindecke's German locomotive website -- [] (last accessed 5 February 2006) and Data from diagram UG Type 86, Societe Alsacienne de Constructions Mecaniques from locomotive book supplied by Dany Machi up at [] as

Diagrammes des machines SACM construites a GRAFENSTADEN (October 2007).

The Prussian Minister for State Works convened an eight-day meeting in 1874 with head engineers of several German railroads and arrived at two "Standard" designs --a 2-4-0 for passenger work and an 0-6-0 for freight operations.

The 2-4-0 design was based on several private designs, but had relatively low drivers for express work. Nevertheless, 695 engines of this P3 standard were built between 1884 and 1903. There were variations, as one might expect, but the SACM diagram fairly represents the basic P3 design. A further development of the express engine by the Magdeburg Region resulted in the S1 (see separate entry).


Class S1 / BR 12.70 (Locobase 712)

Data from Reder (1974) and Christian Lindecke's [].

The Magdeburg Region railroad was not pleased with the P3 Standard passenger engine developed by a conference of engineers and the Prussian Minister for State Works in 1874-1875. Wanting more power and higher drivers, the Prussian State Railways introduced an engine that later became standardized as the S1 (S=Schnellzuglokomitiv).

After an initial flirtation with two-cylinder compounds (Locobase 1218), the KPEV turned to the design shown here. Still carrying its horizontal cylinders ahead of the single leading axle, the S1 was as powerful a 2-4-0 as was built by any company. An average speed of 53 mph (85 km/h) pulling 172 tons over 159 miles (256 km) between Berlin and Hanover is an indication of the engine's abilities.

261 were completed between 1884 and 1895. They were superseded by the S3 compounds; see separate entry.


Class T 4.1 (Locobase 6342)

Data from Christian Lindecke data from [] (14 November 2004).

Slightly smaller, lighter variant of the original T4 (Locobase 6341) and, like the T4s, headed local passenger service in many instances as well as in freight.. Of all the T4s sub-classes, the T4.1 appeared in the most numbers and most of those used the "Berlin" domeless boier. Variants within the T4.1s The eight delivered to the Eustin-Lubeckerbahn arrived with steam domes and one later acquired a superheater.


Class T 4.3 (Locobase 6343)

Data from Christian Lindecke data from [] (14 November 2004).

Last in a series of Prussian tank locomotives.


Class T4 (Locobase 6341)

Data from Christian Lindecke data from [] (14 November 2004); and "Preuáische T 4" in Wikipedia at [], last accessed 18 November 2023.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassP 1P2P3.1 / 34.7S1 / BR 12.70T 4.1
Locobase ID6344 4923 713 712 6342
RailroadPrussian StatePrussian StatePrussian StatePrussian StatePrussian State
CountryPrussiaPrussiaPrussiaPrussiaPrussia
Whyte2-4-02-4-02-4-02-4-02-4-0T
Number in Class100318695261169
Road Numbers
GaugeStdStdStdStdStd
Number Built318695261169
Builderseveralseveralseveralseveralseveral
Year18701877188418851890
Valve GearStephensonAllanStephensonWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) / 2.60 6.56 / 2 6.56 / 2
Engine Wheelbase (ft / m) / 4.40 9.81 / 2.9914.76 / 4.5014.80 / 4.51
Ratio of driving wheelbase to overall engine wheelbase 0.44 0.44
Overall Wheelbase (engine & tender) (ft / m)35.05 / 10.68
Axle Loading (Maximum Weight per Axle) (lbs / kg)26,720 / 12,12022,487 / 10,20028,550 / 12,95032,187 / 14,600
Weight on Drivers (lbs / kg)53,837 / 24,42055,336 / 25,10056,579 / 25,66460,848 / 27,60064,154 / 29,100
Engine Weight (lbs / kg)82,034 / 38,00083,776 / 38,00081,099 / 36,78691,051 / 41,30095,240 / 43,200
Tender Loaded Weight (lbs / kg)66,580 / 30,200
Total Engine and Tender Weight (lbs / kg)147,679 / 66,98695,240 / 43,200
Tender Water Capacity (gals / ML)2772 / 10.503168 / 12
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 8.80 / 8 4.40 / 4
Minimum weight of rail (calculated) (lb/yd / kg/m)45 / 22.5046 / 2347 / 23.5051 / 25.5053 / 26.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)61.80 / 157062.20 / 158068.10 / 173078 / 198062.20 / 1580
Boiler Pressure (psi / kPa)145 / 10145 / 10179.80 / 12.40179.80 / 12.40174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)16" x 22" / 406x56016.54" x 23.62" / 420x60015.75" x 22.05" / 400x56016.54" x 23.62" / 420x60016.54" x 23.62" / 420x600
Tractive Effort (lbs / kg)11,232 / 5094.7612,804 / 5807.8012,275 / 5567.8512,661 / 5742.9415,365 / 6969.46
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.79 4.32 4.61 4.81 4.18
Heating Ability
Tubes (number - dia) (in / mm)197 - 1.614" / 41
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)12.47 / 3.80 / 3.72
Firebox Area (sq ft / m2)86.11 / 873.20 / 6.80
Grate Area (sq ft / m2)19.05 / 1.7718.62 / 1.7320.13 / 1.8722.28 / 2.0717.22 / 1.60
Evaporative Heating Surface (sq ft / m2)1038 / 96.461026 / 95.351111 / 103.231014 / 94.23964 / 89.60
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1038 / 96.461026 / 95.351111 / 103.231014 / 94.23964 / 89.60
Evaporative Heating Surface/Cylinder Volume202.75174.67223.44172.63164.12
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation27622700361940062996
Same as above plus superheater percentage27622700361940062996
Same as above but substitute firebox area for grate area12,48613,161
Power L137276062
Power MT296.97472.42

Principal Dimensions by Steve Llanso of Sweat House Media

ClassT 4.3T4
Locobase ID6343 6341
RailroadPrussian StatePrussian State
CountryPrussiaPrussia
Whyte2-4-0T2-4-0T
Number in Class
Road Numbers
GaugeStdStd
Number Built
BuilderErfurthseveral
Year18981884
Valve GearWalschaertWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)66,139 / 30,00063,471 / 28,790
Engine Weight (lbs / kg)99,208 / 45,00094,733 / 42,970
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)99,208 / 45,00094,733 / 42,970
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)55 / 27.5053 / 26.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 160061.80 / 1570
Boiler Pressure (psi / kPa)174 / 12174 / 12
High Pressure Cylinders (dia x stroke) (in / mm)16.54" x 23.62" / 420x60016.54" x 24.02" / 420x610
Tractive Effort (lbs / kg)15,170 / 6881.0015,726 / 7133.20
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.36 4.04
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)16.46 / 1.5314.74 / 1.37
Evaporative Heating Surface (sq ft / m2)933 / 86.67976 / 90.67
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)933 / 86.67976 / 90.67
Evaporative Heating Surface/Cylinder Volume158.84163.39
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation28642565
Same as above plus superheater percentage28642565
Same as above but substitute firebox area for grate area
Power L1
Power MT

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