Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 20, pp 66 and 143 Works numbers were 14909-14910 in June 1896 and 24812 in November 1904.
Notwithstanding all of its peculiar virtues, a Consolidation of this size and power was pretty common on the narrow gauge and particularly in Mexico. The I & M (later extended to Nijini) was a 3-ft shortline that included 11 stops in its 28 1/4-mile length.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 12203 |
| Railroad | Ixtlahuaca y Mani |
| Country | Mexico |
| Whyte | 2-8-0 |
| Number in Class | 3 |
| Road Numbers | 1, 11 |
| Gauge | 3' |
| Number Built | 3 |
| Builder | Burnham, Williams & Co |
| Year | 1896 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10.58 / 3.22 |
| Engine Wheelbase (ft / m) | 18.08 / 5.51 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.59 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 70,000 / 31,752 |
| Engine Weight (lbs / kg) | 78,000 / 35,380 |
| Tender Loaded Weight (lbs / kg) | 36,000 / 16,329 |
| Total Engine and Tender Weight (lbs / kg) | 114,000 / 51,709 |
| 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) | 29 / 14.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 38 / 965 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Tractive Effort (lbs / kg) | 18,324 / 8311.64 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.82 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 123 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13.23 / 4.03 |
| Firebox Area (sq ft / m2) | 87 / 8.09 |
| Grate Area (sq ft / m2) | 15.80 / 1.47 |
| Evaporative Heating Surface (sq ft / m2) | 1047 / 97.30 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1047 / 97.30 |
| Evaporative Heating Surface/Cylinder Volume | 225.16 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2528 |
| Same as above plus superheater percentage | 2528 |
| Same as above but substitute firebox area for grate area | 13,920 |
| Power L1 | 3230 |
| Power MT | 406.91 |