Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 78, pp. 170 See also Jorge Arias de Greiff, Un Momento Estelar de la Ingeniera Mecanica en Colombia: Los Disenos de Locomotoras de PC Dewhurst", Boletin Cultural y Bibliographico, Volumne XXVI, No. 21, 1989, pp.19-29. Works number were 58948-58949 in January 1926.
See Locobase 15367 for a full discussion of PC Dewhurst's thoughts in designing the famed "Docerruedas" (Twelve-wheelers). This pair were the fifth and sixth locomotives in a batch of six ordered at the same time by three Colombian railways. Like the others they had two arch tubes in the firebox that contributed 10 sq ft (0.93 sq m) of direct heating surface area and used 9" (229 mm) piston valves to supply steam to the cylinders.
Soon after this pair was delivered, the Girardot combined with the Tolima-Huila. Working for the GTH meant a road number change to 82-83. They kept these numbers when the GTH was incorporated into the Ferrocarriles Colombiano Nacionales.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 23 |
| Locobase ID | 15369 |
| Railroad | Girardot |
| Country | Colombia |
| Whyte | 4-8-0 |
| Number in Class | 2 |
| Road Numbers | 23-24 |
| Gauge | 3' |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1926 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12.50 / 3.81 |
| Engine Wheelbase (ft / m) | 21.92 / 6.68 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.57 |
| Overall Wheelbase (engine & tender) (ft / m) | 47.40 / 14.45 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 26,300 / 11,929 |
| Weight on Drivers (lbs / kg) | 104,000 / 47,174 |
| Engine Weight (lbs / kg) | 125,000 / 56,699 |
| Tender Loaded Weight (lbs / kg) | 70,000 / 31,752 |
| Total Engine and Tender Weight (lbs / kg) | 195,000 / 88,451 |
| Tender Water Capacity (gals / ML) | 3300 / 12.50 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 6 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 43 / 21.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 40 / 1016 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 18" x 22" / 457x559 |
| Tractive Effort (lbs / kg) | 27,265 / 12367.21 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.81 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 129 - 2" / 51 |
| Flues (number - dia) (in / mm) | 20 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 13.83 / 4.22 |
| Firebox Area (sq ft / m2) | 118 / 10.96 |
| Grate Area (sq ft / m2) | 32.60 / 3.03 |
| Evaporative Heating Surface (sq ft / m2) | 1432 / 133.04 |
| Superheating Surface (sq ft / m2) | 305 / 28.34 |
| Combined Heating Surface (sq ft / m2) | 1737 / 161.38 |
| Evaporative Heating Surface/Cylinder Volume | 221.00 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5868 |
| Same as above plus superheater percentage | 6924 |
| Same as above but substitute firebox area for grate area | 25,063 |
| Power L1 | 8828 |
| Power MT | 748.55 |