Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899).
Builder info from B.Rumary, 25 Kingscombe, Gurney Slade, Radstock, BA3 4TH, ENGLAND and Jeremy Lambert as supplied by Allen Stanley in March 2004.
Works number was 1644.
Older-style Eight-wheeler with dome over the crown sheet just ahead of the cab andlarge oil-fueled headlight.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Matehuala |
| Locobase ID | 9620 |
| Railroad | Vanegas, Cedral & Rio Verde |
| Country | Mexico |
| Whyte | 4-4-0 |
| Number in Class | 1 |
| Road Numbers | 2 |
| Gauge | 3' |
| Number Built | 1 |
| Builder | Brooks |
| Year | 1890 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7 / 2.13 |
| Engine Wheelbase (ft / m) | 18.17 / 5.54 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.39 |
| Overall Wheelbase (engine & tender) (ft / m) | 41 / 12.50 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 48,000 / 21,772 |
| Engine Weight (lbs / kg) | 65,000 / 29,484 |
| Tender Loaded Weight (lbs / kg) | 55,000 / 24,948 |
| Total Engine and Tender Weight (lbs / kg) | 120,000 / 54,432 |
| Tender Water Capacity (gals / ML) | 2400 / 9.09 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 40 / 20 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 50 / 1270 |
| Boiler Pressure (psi / kPa) | 150 / 1030 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 |
| Tractive Effort (lbs / kg) | 11,475 / 5204.98 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.18 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 154 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9 / 2.74 |
| Firebox Area (sq ft / m2) | 79 / 7.34 |
| Grate Area (sq ft / m2) | 13.50 / 1.25 |
| Evaporative Heating Surface (sq ft / m2) | 797 / 74.07 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 797 / 74.07 |
| Evaporative Heating Surface/Cylinder Volume | 194.87 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2025 |
| Same as above plus superheater percentage | 2025 |
| Same as above but substitute firebox area for grate area | 11,850 |
| Power L1 | 3643 |
| Power MT | 334.64 |