Nimes et Montpellier 2-4-0 Locomotives in France

Class Details by Steve Llanso of Sweat House Media

Class Type 10 (Locobase 20381)

Data from Schneider Catalogue, last accessed 29 May 2018 at []. Works numbers were 21-23 in 1844.

This design seems very much a Stephenson longboiler. Its haystack style boiler and tall stack bookended a straight boiler with small dome over the lead axle.

Principal Dimensions by Steve Llanso of Sweat House Media

ClassType 10
Locobase ID20381
RailroadNimes et Montpellier
Number in Class3
Road Numbers
Number Built3
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m) 4.92 / 1.50
Engine Wheelbase (ft / m)10.25 / 3.12
Ratio of driving wheelbase to overall engine wheelbase 0.48
Overall Wheelbase (engine & tender) (ft / m)
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)
Engine Weight (lbs / kg)37,479 / 17,000
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)
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)55.10 / 1400
Boiler Pressure (psi / kPa)84.10 / 5.80
High Pressure Cylinders (dia x stroke) (in / mm)14.96" x 23.62" / 380x600
Tractive Effort (lbs / kg)6858 / 3110.74
Factor of Adhesion (Weight on Drivers/Tractive Effort)
Heating Ability
Tubes (number - dia) (in / mm)136 - 1.89" / 48
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.79 / 2.68
Firebox Area (sq ft / m2)64.80 / 6.02
Grate Area (sq ft / m2) 9.58 / 0.89
Evaporative Heating Surface (sq ft / m2)621 / 57.70
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)621 / 57.70
Evaporative Heating Surface/Cylinder Volume129.23
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation806
Same as above plus superheater percentage806
Same as above but substitute firebox area for grate area5450
Power L11519
Power MT

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