Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 25, p. 33. Works number was 20968 in October 1902.
This little wood-burner was ordered by Don Manuel Hernandez Acevedo who represented the Hacienda Pardo and also invested in the Ferrocarril de Santa María del Río in the Estado de San Luis Potosi. The railway connected several haciendas with the village of Ojo Caliente.
See Locobase 12378 to see Mexico's Yucatan railway 0-4-2T, which arrived later in the year and shows identical specifications. (Unlike the Yucatan engine, whose spec required wood or coal grate components, the 1's specs mention only wood fuel.)
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 12622 |
| Railroad | Hacienda Pardo |
| Country | Mexico |
| Whyte | 0-4-2T |
| Number in Class | 1 |
| Road Numbers | 1 |
| Gauge | 60 cm |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1902 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 3.67 / 1.12 |
| Engine Wheelbase (ft / m) | 8.50 / 2.59 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.43 |
| Overall Wheelbase (engine & tender) (ft / m) | 8.50 / 2.59 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 10,500 / 4763 |
| Engine Weight (lbs / kg) | 15,500 / 7031 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 150 / 0.57 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 9 / 4.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 24 / 610 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 7" x 12" / 178x305 |
| Tractive Effort (lbs / kg) | 3124 / 1417.02 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.36 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 46 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 6.26 / 1.91 |
| Firebox Area (sq ft / m2) | 19.50 / 1.81 |
| Grate Area (sq ft / m2) | 4.53 / 0.42 |
| Evaporative Heating Surface (sq ft / m2) | 132 / 12.27 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 132 / 12.27 |
| Evaporative Heating Surface/Cylinder Volume | 249.06 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 680 |
| Same as above plus superheater percentage | 680 |
| Same as above but substitute firebox area for grate area | 2925 |
| Power L1 | 2598 |
| Power MT | 1090.97 |