Lozere et du Vivarais Articulated Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class 321 (Locobase 7598)

Data from a site that reproduces cigarette card pictures and adds dimension and area data -- [], last accessed 14 June 2006

These Mallets opened the service on the Lozere-Vivarais line on 8 August 1909, as noted on the account of the inauguration, [] . A photograph shows a tidy design with Belpaire firebox, dome over the front engine, tanks running forward to end just behind the stack.

The railway is headquartered at Tournon in the Ardeche, a part of the Rhone Valley.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID7598
RailroadLozere et du Vivarais
Number in Class5
Road Numbers321-325
Number Built5
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)21.39 / 6.52
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)71,430 / 32,400
Engine Weight (lbs / kg)83,996 / 38,100
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)83,996 / 38,100
Tender Water Capacity (gals / ML)
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)30 / 15
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)40.60 / 1030
Boiler Pressure (psi / kPa)188.50 / 13
High Pressure Cylinders (dia x stroke) (in / mm)11.02" x 19.69" / 280x500
Low Pressure Cylinders (dia x stroke) (in / mm)16.73" x 19.69" / 425x500
Tractive Effort (lbs / kg)13,162 / 5970.19
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.43
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)12.05 / 1.12
Evaporative Heating Surface (sq ft / m2)675 / 62.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)675 / 62.70
Evaporative Heating Surface/Cylinder Volume310.54
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2271
Same as above plus superheater percentage2271
Same as above but substitute firebox area for grate area
Power L1
Power MT

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