Data and elevation from narrowmind.railfan.net. See also "Mallet Compound Locomotive for the Colombia National," The Railway Age Gazette, Vol 48 (2 February 1910), p. 357. Works numbers were 46168-46169 in May 1913.
Six-coupled Mallet tank with the LP cylinder thrust well forward of the smokebox. They were credited with 100 long tons up a 4% grade and around 22-deg curves at 12 1/2 mph (20 km/h).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 20 |
| Locobase ID | 4420 |
| Railroad | FC de Giradot |
| Country | Colombia |
| Whyte | 0-6-6-0T |
| Number in Class | 2 |
| Road Numbers | 20-21 |
| Gauge | 3' |
| Number Built | 2 |
| Builder | Alco-Schenectady |
| Year | 1909 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.67 / 2.34 |
| Engine Wheelbase (ft / m) | 23.33 / 7.11 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.33 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 127,500 / 57,833 |
| Engine Weight (lbs / kg) | 127,500 / 57,833 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 127,500 / 57,833 |
| Tender Water Capacity (gals / ML) | 2160 / 7.58 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 35 / 17.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 38 / 965 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 20" / 330x508 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 20.5" x 20" / 521x508 |
| Tractive Effort (lbs / kg) | 21,569 / 9783.55 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.91 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 150 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14 / 4.27 |
| Firebox Area (sq ft / m2) | 70 / 6.51 |
| Grate Area (sq ft / m2) | 24.10 / 2.24 |
| Evaporative Heating Surface (sq ft / m2) | 1160 / 107.81 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1160 / 107.81 |
| Evaporative Heating Surface/Cylinder Volume | 377.54 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4820 |
| Same as above plus superheater percentage | 4820 |
| Same as above but substitute firebox area for grate area | 14,000 |
| Power L1 | 2503 |
| Power MT | 259.68 |