Data from DeGolyer, Volume 65, pp 371+. Works number was 53096 in April 1920.
This was the bigger of two industrial saddle tanks sold by Baldwin to this oil refinery in 1920. Compared to the 4 described in Locobase 14982, this engine was almost three times as big. Tube thickness increased through the original spec of #12 BWG (the 4's tubes had #13 BWG). Apparently Petrolea desired a still thicker tube as a hand-written change dropped the BWG to #11.
Data from DeGolyer, Volume 65, pp 367+. Works number was 53063 in March 1920.
Tiny even by industrial standards, this appropriately oil-fired saddle tank served an oil refinery. The fuel had a gravity of 18-22 degree Baume and rode in a tank on the left side of the cab. (Which leads to the question: if there even was a fireman, where did he sit?).
The W M Best burner in this miniature steamer followed the by-now typical installation that put the burner at the front end of the firebox. As described by Anglo-Mexican in Locobase 16223 when applied to Texas & Pacific 2-10-2s that weighed about 264 short tons each, "this outside-mixing design sprayed oil down into a horizontal stream of steam, converting the oil into a "mist of very fine particles." Anglo-Mexican added that the "opening of the burner can be shaped to throw either a long narrow flame or a fan-shaped blaze nine feet wide."
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 3 | 4 |
| Locobase ID | 14983 | 14982 |
| Railroad | Cia de Transcontinental de Petroleo | Cia de Transcontinental de Petroleo |
| Country | Mexico | Mexico |
| Whyte | 0-4-0ST | 0-4-0ST |
| Number in Class | 1 | 1 |
| Road Numbers | 3 | 4 |
| Gauge | 3' | 3' |
| Number Built | 1 | 1 |
| Builder | Baldwin | Baldwin |
| Year | 1920 | 1920 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 5 / 1.52 | 3.83 / 1.17 |
| Engine Wheelbase (ft / m) | 5 / 1.52 | 3.83 / 1.17 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 5 / 1.52 | 3.83 / 1.17 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 36,000 / 16,329 | 17,000 / 7711 |
| Engine Weight (lbs / kg) | 36,000 / 16,329 | 17,000 / 7711 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | 800 / 3.03 | 300 / 1.14 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 150 / 568 | 150 / 568 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 30 / 15 | 14 / 7 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 29 / 737 | 24 / 610 |
| Boiler Pressure (psi / kPa) | 170 / 1170 | 170 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 | 7" x 12" / 178x305 |
| Tractive Effort (lbs / kg) | 9647 / 4375.81 | 3540 / 1605.72 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.73 | 4.80 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 76 - 2" / 51 | 43 - 1.5" / 38 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 8.37 / 2.55 | 6.33 / 1.93 |
| Firebox Area (sq ft / m2) | 40 / 3.72 | 16.30 / 1.51 |
| Grate Area (sq ft / m2) | 8.70 / 0.81 | 3.70 / 0.34 |
| Evaporative Heating Surface (sq ft / m2) | 373 / 34.65 | 122 / 11.33 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 373 / 34.65 | 122 / 11.33 |
| Evaporative Heating Surface/Cylinder Volume | 211.93 | 230.19 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1479 | 629 |
| Same as above plus superheater percentage | 1479 | 629 |
| Same as above but substitute firebox area for grate area | 6800 | 2771 |
| Power L1 | 2675 | 2611 |
| Power MT | 327.63 | 677.21 |