Mina Loreto 0-4-2 Locomotives in Chile


Class Details by Steve Llanso of Sweat House Media

Class 1 (Locobase 13072)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 30, p. 156. See also "The FC Mina Loreto" at the Railways of the Far South webpage ([]). Works number was 29719 in December 1906 and 44824 in January 1917.

Most tanks of this size and arrangement served sugar plantations, but the Punta Arenas operated at the extreme southern end of the South American continent. (The city was in fact 6,390 nautical miles from New York City.) The second locomotive, ordered eleven years later, was named Magallanes and put one short ton of weight on the drivers.


Class Loreto (Locobase 12468)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 23, p. 196. Works number was 18510 in December 1900

The Loreto went about as far south in the New World as a locomotive could go when it traveled to Punta Arenas. The Mina Loreto tramway served a thick belt of lignite by taking it to the port and the Loreto was guaranteed to haul 65 tons of that up a 2 1/4% grade.

Principal Dimensions by Steve Llanso of Sweat House Media

Class1Loreto
Locobase ID13072 12468
RailroadMina LoretoMina Loreto
CountryChileChile
Whyte0-4-2T0-4-2T
Number in Class11
Road Numbers11
GaugeMetreMetre
Number Built11
BuilderBurnham, Williams & CoBurnham, Williams & Co
Year19061900
Valve GearStephensonStephenson
Locomotive Length and Weight
Driver Wheelbase (ft / m)5 / 1.52 4.50 / 1.37
Engine Wheelbase (ft / m)11.50 / 3.5110.75 / 3.28
Ratio of driving wheelbase to overall engine wheelbase 0.43 0.42
Overall Wheelbase (engine & tender) (ft / m)11.50 / 3.5110.75 / 3.28
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)36,000 / 16,32923,000 / 10,433
Engine Weight (lbs / kg)40,000 / 18,14428,000 / 12,701
Tender Loaded Weight (lbs / kg)
Total Engine and Tender Weight (lbs / kg)40,000 / 18,14428,000 / 12,701
Tender Water Capacity (gals / ML)500 / 1.89350 / 1.33
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT)
Minimum weight of rail (calculated) (lb/yd / kg/m)30 / 1519 / 9.50
Geometry Relating to Tractive Effort
Driver Diameter (in / mm)37 / 94033 / 838
Boiler Pressure (psi / kPa)160 / 11160 / 11
High Pressure Cylinders (dia x stroke) (in / mm)11" x 16" / 279x4069" x 14" / 229x356
Tractive Effort (lbs / kg)7116 / 3227.774673 / 2119.64
Factor of Adhesion (Weight on Drivers/Tractive Effort) 5.06 4.92
Heating Ability
Tubes (number - dia) (in / mm)74 - 1.75" / 4486 - 1.5" / 38
Flues (number - dia) (in / mm)
Flue/Tube length (ft / m) 8.79 / 2.68 7.97 / 2.43
Firebox Area (sq ft / m2)38.20 / 3.5528.40 / 2.64
Grate Area (sq ft / m2) 7.80 / 0.72 7.24 / 0.67
Evaporative Heating Surface (sq ft / m2)333 / 30.95295 / 27.42
Superheating Surface (sq ft / m2)
Combined Heating Surface (sq ft / m2)333 / 30.95295 / 27.42
Evaporative Heating Surface/Cylinder Volume189.22286.18
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation12481158
Same as above plus superheater percentage12481158
Same as above but substitute firebox area for grate area61124544
Power L129383731
Power MT359.84715.26

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