Caldas 2-8-2 Locomotives in Colombia

Class Details by Steve Llanso of Sweat House Media

Class 9 (Locobase 15365)

Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 66, pp. 91+. Works numbers were 58418 in May 1925.

Low-grade lignite could generate BTU levels as low as 9,500 and contain 21% ash. But when it was all that was readily available, it would serve as a fuel. The firebox on this Mike was Woottenesqe in its width (as a percentage of gauge) to handle this friable fuel. It was identical to the 2-8-2s and 4-6-2s of the Antioquia shown in Locobases 15068 and 12691, but both of those classes burned oil.

To help get the most out of the lignite in such a small engine, direct heating surface was augmented by 12 sq ft (1.1 sq m) and superheated steam entered the cylinders through 8" (203 mm) piston valves.

At some later date, the 4 went to the Ferrocarril de Ambalema-IbaguT and ultimately, in 1953, donned the National Railways herald and road number 42.

Principal Dimensions by Steve Llanso of Sweat House Media

Locobase ID15365
Number in Class1
Road Numbers9 / 42
Number Built1
Valve GearWalschaert
Locomotive Length and Weight
Driver Wheelbase (ft / m)10 / 3.05
Engine Wheelbase (ft / m)23.92 / 7.29
Ratio of driving wheelbase to overall engine wheelbase 0.42
Overall Wheelbase (engine & tender) (ft / m)44.21 / 13.48
Axle Loading (Maximum Weight per Axle) (lbs / kg)
Weight on Drivers (lbs / kg)72,000 / 32,659
Engine Weight (lbs / kg)96,300 / 43,681
Tender Loaded Weight (lbs / kg)37,700 / 17,100
Total Engine and Tender Weight (lbs / kg)134,000 / 60,781
Tender Water Capacity (gals / ML)1600 / 6.06
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)34 / 864
Boiler Pressure (psi / kPa)180 / 12.40
High Pressure Cylinders (dia x stroke) (in / mm)15" x 18" / 381x457
Tractive Effort (lbs / kg)18,225 / 8266.73
Factor of Adhesion (Weight on Drivers/Tractive Effort) 3.95
Heating Ability
Tubes (number - dia) (in / mm)85 - 2" / 51
Flues (number - dia) (in / mm)12 - 5.375" / 137
Flue/Tube length (ft / m)13 / 3.96
Firebox Area (sq ft / m2)97 / 7.90
Grate Area (sq ft / m2)28.50 / 2.65
Evaporative Heating Surface (sq ft / m2)890 / 82.68
Superheating Surface (sq ft / m2)185 / 17.19
Combined Heating Surface (sq ft / m2)1075 / 99.87
Evaporative Heating Surface/Cylinder Volume241.75
Computations Relating to Power Output (More Information)
Robert LeMassena's Power Computation5130
Same as above plus superheater percentage6002
Same as above but substitute firebox area for grate area20,428
Power L18423
Power MT1031.64

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