Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 31, p. 127. See also biography of Martfnez Negrete, Francisco (1797-1874), found at [], last accessed 11 October 2011. Works number was 32390 in December 1907.
Typical plantation tank from Baldwin. Locobase has found a Dolores Martinez Negrete of Bermejillo, "proprietaria" (proprietress) of the Hacienda Jesus Maria from whom land was bought in 1896. Hacienda Jesus Maria was located in San Luis Potosi.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Dolores |
| Locobase ID | 13238 |
| Railroad | Sra Dolores Martinez Negrete |
| Country | Mexico |
| Whyte | 0-4-2T |
| Number in Class | 1 |
| Road Numbers | |
| Gauge | Std |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1907 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5 / 1.52 |
| Engine Wheelbase (ft / m) | 11.50 / 3.51 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.43 |
| Overall Wheelbase (engine & tender) (ft / m) | 11.50 / 3.51 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 30,000 / 13,608 |
| Engine Weight (lbs / kg) | 40,000 / 18,144 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 450 / 1.70 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 25 / 12.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 38 / 965 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 16" / 254x406 |
| Tractive Effort (lbs / kg) | 5368 / 2434.89 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.59 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 96 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 7.99 / 2.44 |
| Firebox Area (sq ft / m2) | 40.30 / 3.75 |
| Grate Area (sq ft / m2) | 8.80 / 0.82 |
| Evaporative Heating Surface (sq ft / m2) | 338 / 31.41 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 338 / 31.41 |
| Evaporative Heating Surface/Cylinder Volume | 233.10 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1320 |
| Same as above plus superheater percentage | 1320 |
| Same as above but substitute firebox area for grate area | 6045 |
| Power L1 | 3535 |
| Power MT | 519.56 |