Transandine Railway 2-6-2 Locomotives in Argentina

Class Details by Steve Llanso of Sweat House Media

Class 11 (Locobase 3748)

Data provided by Carlos Alberto Fernández Priotti in Bryan Attewell ([] Steam Locomotive simulator program (April 2000). See also Charles Wellington Furlong, "South America's First Transcontinental", The World's Work, Volume XX [20] (Garden City, NY: Doubleday, Page & Co, 1910), pp. 13535-13554. Works numbers were 4229-4230 in 1902.

These two small Prairie tanks faced a mountain of challenges when they arrived on the Transandino. They were rated for "mixto" by the Trasandino, as close to passenger engines as the railway's demanding profile would allow.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID3748
RailroadTransandine Railway
Number in Class2
Road Numbers11-12
Number Built2
BuilderDubs & Co
Valve Gear
Locomotive Length and Weight
Driver Wheelbase (ft / m)
Engine Wheelbase (ft / m)
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)65,744 / 29,821
Engine Weight (lbs / kg)
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)
Tender Water Capacity (gals / ML)1100 / 4.17
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) 1.90 / 2
Minimum weight of rail (calculated) (lb/yd / kg/m)37 / 18.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)39 / 991
Boiler Pressure (psi / kPa)178.40 / 12.30
High Pressure Cylinders (dia x stroke) (in / mm)14.5" x 20" / 368x508
Tractive Effort (lbs / kg)16,350 / 7416.24
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.02
Heating Ability
Tubes (number - dia) (in / mm)
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.67 / 2.64
Firebox Area (sq ft / m2)
Grate Area (sq ft / m2)12.30 / 1.14
Evaporative Heating Surface (sq ft / m2)639 / 59.39
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)639 / 59.39
Evaporative Heating Surface/Cylinder Volume167.17
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2194
Same as above plus superheater percentage2194
Same as above but substitute firebox area for grate area
Power L1
Power MT

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