Paris-Rouen 2-2-2 Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class Buddicom (Locobase 608)

Data from See also Gustav Reder (Michael Reynolds, trans), The world of steam locomotives (New York: Putnam, 1974).

Buddicom and Alcard were English engine builders who relocated to France (Sotteville and Chartreux) and obtained a license to build "Allan-Crewe" type external-frame 2-2-2s.

In the French design, cylinder proportions differed and the cylinders were attached higher on a carrier between a sub-frame and the inner main frame. The inside valve gear operated outside slide valves through a rocking arm. 40 were built and proved capable of the relatively high speed of 40 mph in service. When the Paris-Rouen was taken over by the Ouest Railway, these engines were renumbered 101-140. 25 were converted to tank engines in 1860-1865, 10 of these serving until 1914.

Buddicom and Alcard built 30 identical engines for the Amiens-Boulogne in 1838, these too being converted to tank engines in the 1860s.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID608
Number in Class40
Road Numbers1
Number Built40
BuilderAlcard Buddicom
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)12.99 / 3.96
Ratio of driving wheelbase to overall engine wheelbase
Overall Wheelbase (engine & tender) (ft / m)11.09 / 3.38
Axle Loading (Maximum Weight per Axle) (lbs / kg)14,550 / 6600
Weight on Drivers (lbs / kg)15,435 / 7001
Engine Weight (lbs / kg)31,974 / 14,503
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)26 / 13
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)63 / 1600
Boiler Pressure (psi / kPa)69.60 / 4.80
High Pressure Cylinders (dia x stroke) (in / mm)12.52" x 20.98" / 318x533
Tractive Effort (lbs / kg)3088 / 1400.69
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.00
Heating Ability
Tubes (number - dia) (in / mm) / 49
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) / 2.62
Firebox Area (sq ft / m2)53.26 / 4.95
Grate Area (sq ft / m2) 9.25 / 0.86
Evaporative Heating Surface (sq ft / m2)524 / 48.73
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)524 / 48.73
Evaporative Heating Surface/Cylinder Volume175.28
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation644
Same as above plus superheater percentage644
Same as above but substitute firebox area for grate area3707
Power L11932
Power MT275.95

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