Tours a Nantes 2-2-2 Locomotives in France


Class Details by Steve Llanso of Sweat House Media

Class unknown (Locobase 11347)

Data from L Chatelier, E Flachat, J Petiet, and C Polonceau, Guide du Mecanicien Constructeur et Conducteur de Machines Locomotives (Paris: Chez Paul Dupont, 1851), pp. 369-370 and tables on 376-387.

This locomotive design represents Victor Forquenot's variation on the basic Stephenson single so widely used in European service at the time. Among other changes, he moved the trailing axle behind the firebox.

Principal Dimensions by Steve Llanso of Middle Run Media
Classunknown
Locobase ID11347
RailroadTours a Nantes
CountryFrance
Whyte2-2-2
Number in Class
Road Numbers
GaugeStd
Number Built
BuilderKoechlin
Year1847
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)11.84 / 3.61
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)
Engine Weight (lbs / kg)46,848 / 21,250
Tender Loaded Weight (lbs / kg)31,427 / 14,255
Total Engine and Tender Weight (lbs / kg)78,275 / 35,505
Tender Water Capacity (gals / ML)1354 / 5.13
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)2 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)72 / 1830
Boiler Pressure (psi / kPa)97.20 / 670
High Pressure Cylinders (dia x stroke) (in / mm)14.96" x 22.05" / 380x560
Tractive Effort (lbs / kg)5663 / 2568.70
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)151 - 1.929" / 49
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.68 / 2.95
Firebox Area (sq ft / m2)75.21 / 6.99
Grate Area (sq ft / m2)10.76 / 1
Evaporative Heating Surface (sq ft / m2)783 / 72.76
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)783 / 72.76
Evaporative Heating Surface/Cylinder Volume174.55
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation1046
Same as above plus superheater percentage1046
Same as above but substitute firebox area for grate area7310
Power L13014
Power MT

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