SNCF 0-6-0 Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class 3 AT (Locobase 6168)

Data from US Military Railway Service Equipment Data Book for French Locomotives supplied by Allen Stanley in March 2004 from his extensive Rail Data Exchange.

For a long time, Locobase could not place this locomotive. A later locomotive, described in Locobase 9144, has identical data. Built for the series of local rail lines laid out in France in the 1870s and 1880s, such locomotives served both freight and passenger trains.

Principal Dimensions by Steve Llanso of Sweat House Media

Class3 AT
Locobase ID6168
Number in Class32
Road Numbers
Number Built
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)10.82 / 3.30
Engine Wheelbase (ft / m)10.82 / 3.30
Ratio of driving wheelbase to overall engine wheelbase1
Overall Wheelbase (engine & tender) (ft / m)10.82 / 3.30
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)77,912 / 35,340
Engine Weight (lbs / kg)77,912 / 35,340
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)43 / 21.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)46 / 1168
Boiler Pressure (psi / kPa)145 / 10
High Pressure Cylinders (dia x stroke) (in / mm)16.14" x 23.62" / 410x600
Tractive Effort (lbs / kg)16,486 / 7477.93
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.73
Heating Ability
Tubes (number - dia) (in / mm)181 - 1.815" / 46
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m)10.79 / 3.29
Firebox Area (sq ft / m2)77 / 7.16
Grate Area (sq ft / m2)18.60 / 1.73
Evaporative Heating Surface (sq ft / m2)931 / 86.52
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)931 / 86.52
Evaporative Heating Surface/Cylinder Volume166.45
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2697
Same as above plus superheater percentage2697
Same as above but substitute firebox area for grate area11,165
Power L12616
Power MT222.07

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