Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 24, p. 222. Works numbers were 20149-20150 in February 1902..
Oaxaca and her sister Ocotlan exerted a healthy amount of power on this 44-mile-long short line. Luis Garcia Tereuel built the line, which served mining reserves in the Central Valleeys.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Oaxaca |
| Locobase ID | 12604 |
| Railroad | Oaxaca a Ejutla |
| Country | Mexico |
| Whyte | 2-8-0 |
| Number in Class | 2 |
| Road Numbers | 4-5 |
| Gauge | 3' |
| Number Built | 2 |
| Builder | Burnham, Williams & Co |
| Year | 1902 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.83 / 3 |
| Engine Wheelbase (ft / m) | 16.42 / 5 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.60 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 68,000 / 30,844 |
| Engine Weight (lbs / kg) | 74,000 / 33,566 |
| Tender Loaded Weight (lbs / kg) | 44,000 / 19,958 |
| Total Engine and Tender Weight (lbs / kg) | 118,000 / 53,524 |
| Tender Water Capacity (gals / ML) | 2000 / 7.58 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 28 / 14 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 36 / 914 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 18" / 381x457 |
| Tractive Effort (lbs / kg) | 17,213 / 7807.69 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.95 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 109 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14 / 4.27 |
| Firebox Area (sq ft / m2) | 57 / 5.30 |
| Grate Area (sq ft / m2) | 11.30 / 1.05 |
| Evaporative Heating Surface (sq ft / m2) | 949 / 88.20 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 949 / 88.20 |
| Evaporative Heating Surface/Cylinder Volume | 257.88 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2034 |
| Same as above plus superheater percentage | 2034 |
| Same as above but substitute firebox area for grate area | 10,260 |
| Power L1 | 3622 |
| Power MT | 469.71 |