Prussian State 2-4-2 Locomotives in Germany


Class Details by Steve Llanso of Sweat House Media

Class P 3 (Locobase 6345)

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

Lindecke shows 44 metric tons for the adhesion weight, which seems much too high. 24 metric tons results in a more reasonable factor of adhesion and a more likely percentage of total weight on the drivers.


Class T5.1 / BR 71 (Locobase 2136)

Data from the table presented on pages 405, 407 of the Groupe VI. - GTnie civil. - Moyens de transport. DeuxiFme partie. Classes 32 (Tome I), part of the series of Rapports du Jury Internationale of the Exposition Unverselle Internationale de 1900 Paris Exposition, hosted on the website of Le Conservatoire numTrique des Arts & MTtiers ([], Accessed 21 August 2005).

The T5 was rated at 65 km/h (40 mph) when it ran on the Hesse States' Main-Neckar bahn.

Principal Dimensions by Steve Llanso of Middle Run Media

ClassP 3T5.1 / BR 71
Locobase ID6345 2136
RailroadPrussian StatePrussian State
CountryPrussiaPrussia
Whyte2-4-22-4-2T
Number in Class118
Road Numbers
GaugeStdStd
Number Built118
BuilderseveralHenschel & Sohn
Year18931895
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m) 6.56 / 2
Engine Wheelbase (ft / m)22.31 / 6.80
Ratio of driving wheelbase to overall engine wheelbase 0.29
Overall Wheelbase (engine & tender) (ft / m)22.31 / 6.80
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)52,91069,225 / 31,400
Engine Weight (lbs / kg)105,822 / 48,000117,131 / 53,130
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)117,131 / 53,130
Tender Water Capacity (gals / ML)1505 / 5.70
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 2.50 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)44 / 2258 / 29
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)73.60 / 187057.10 / 1450
Boiler Pressure (psi / kPa)174 / 12188.50 / 13
High Pressure Cylinders (dia x stroke) (in / mm)17.13" x 23.62" / 435x60016.93" x 23.62" / 430x600
Tractive Effort (lbs / kg)13,928 / 6317.6418,997 / 8616.90
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.80 3.64
Heating Ability
Tubes (number - dia) (in / mm)171 - 1.811" / 46
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)13.12 / 4
Firebox Area (sq ft / m2)85 / 7.90
Grate Area (sq ft / m2)19.37 / 1.8016.89 / 1.57
Evaporative Heating Surface (sq ft / m2)1250 / 116.201047 / 97.30
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)1250 / 116.201047 / 97.30
Evaporative Heating Surface/Cylinder Volume198.40170.13
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation33703184
Same as above plus superheater percentage33703184
Same as above but substitute firebox area for grate area16,023
Power L14291
Power MT273.31

All material Copyright © SteamLocomotive.com
Wes Barris