Llano del Maipo 2-8-0 Locomotives in Chile

Class Details by Steve Llanso of Sweat House Media

Class 6 (Locobase 13874)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 49, p. 179. See also the amigos del tren article at [] and an essay [], last accessed 16 February 2012. Works number was 40912 in November 1913.

As handy as the Moguls on this wine road (Locobase 13873) might have been, traffic levels clearly demanded more power. This Consolidation represented a substantial enlargement in all respects as it deployed almost double the adhesion weight, and 50% more tractive effort.

In 1925, ambitions for international connections long since abandoned, the Ll del M was transformed into an interurban line. Over the next several decades, its infrastructure would be integerated into the Santiago Metro system.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID13874
RailroadLlano del Maipo
Number in Class1
Road Numbers6
Number Built1
Valve GearStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)11.33 / 3.45
Engine Wheelbase (ft / m)17.67 / 5.39
Ratio of driving wheelbase to overall engine wheelbase 0.64
Overall Wheelbase (engine & tender) (ft / m)40.29 / 12.28
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)61,000 / 27,669
Engine Weight (lbs / kg)70,000 / 31,752
Tender Loaded Weight (lbs / kg)48,000 / 21,772
Total Engine and Tender Weight (lbs / kg)118,000 / 53,524
Tender Water Capacity (gals / ML)2400 / 9.09
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)900 / 3407
Minimum weight of rail (calculated) (lb/yd / kg/m)25 / 12.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)39 / 991
Boiler Pressure (psi / kPa)160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)15" x 18" / 381x457
Tractive Effort (lbs / kg)14,123 / 6406.09
Factor of Adhesion (Weight on Drivers/Tractive Effort) 4.32
Heating Ability
Tubes (number - dia) (in / mm)150 - 2" / 51
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 9.50 / 2.90
Firebox Area (sq ft / m2)84 / 7.81
Grate Area (sq ft / m2)15 / 1.39
Evaporative Heating Surface (sq ft / m2)824 / 76.58
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)824 / 76.58
Evaporative Heating Surface/Cylinder Volume223.82
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation2400
Same as above plus superheater percentage2400
Same as above but substitute firebox area for grate area13,440
Power L13514
Power MT508.00

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