Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p 245. Works number was 29869 in December 1906
Apparently a Pacific wasn't really the answer for the C y Z's motive power needs; as noted in Locobase 12705, the 6 would be converted to a Ten-wheeler in 1910. In 1906, the C y Z bought a 4-6-0 from Baldwin that had same power dimensions but slight changes in the firebox (smaller) and boiler (larger).
| Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | 7 |
| Locobase ID | 12706 |
| Railroad | Coahuila y Zacatecas |
| Country | Mexico |
| Whyte | 4-6-0 |
| Number in Class | 1 |
| Road Numbers | 7 |
| Gauge | 3' |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1906 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.67 / 2.34 |
| Engine Wheelbase (ft / m) | 21.42 / 6.53 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 |
| Overall Wheelbase (engine & tender) (ft / m) | 47.50 / 14.48 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 75,000 / 34,019 |
| Engine Weight (lbs / kg) | 105,000 / 47,627 |
| Tender Loaded Weight (lbs / kg) | 75,000 / 34,019 |
| Total Engine and Tender Weight (lbs / kg) | 180,000 / 81,646 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 42 / 21 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 180 / 12.40 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 20" / 432x508 |
| Tractive Effort (lbs / kg) | 21,056 / 9550.85 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.56 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 200 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14.50 / 4.42 |
| Firebox Area (sq ft / m2) | 71.70 / 6.66 |
| Grate Area (sq ft / m2) | 19.60 / 1.82 |
| Evaporative Heating Surface (sq ft / m2) | 1581 / 146.93 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1581 / 146.93 |
| Evaporative Heating Surface/Cylinder Volume | 301.14 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 3528 |
| Same as above plus superheater percentage | 3528 |
| Same as above but substitute firebox area for grate area | 12,906 |
| Power L1 | 4655 |
| Power MT | 410.50 |