Data from Catalogue Descriptive of Simple and Compound Locomotives built by Brooks Locomotive Works, Dunkirk, NY (Buffalo, NY: Matthew-Northrup Company, 1899); works numbers were 2024-2025.
This tiny saddle-tank had a full-size cab over small trailing wheels (24" diameter), which accentuated the disproportion. Yet, the factors show this was a full-capacity locomotive in miniature.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 2888 |
| Railroad | Santa Maria Magdalena |
| Country | Brazil |
| Whyte | 2-4-2T |
| Number in Class | 2 |
| Road Numbers | 1-2 |
| Gauge | metre |
| Number Built | 2 |
| Builder | Brooks |
| Year | 1891 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.67 / 1.73 |
| Engine Wheelbase (ft / m) | 20 / 6.10 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.28 |
| Overall Wheelbase (engine & tender) (ft / m) | 20 / 6.10 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 36,000 / 16,329 |
| Engine Weight (lbs / kg) | 56,000 / 25,401 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 700 / 2.65 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1 / 1 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 30 / 15 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 152.30 / 1050 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 18" / 305x457 |
| Tractive Effort (lbs / kg) | 7989 / 3623.75 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.51 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 92 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9 / 2.74 |
| Firebox Area (sq ft / m2) | 63 / 5.86 |
| Grate Area (sq ft / m2) | 9.60 / 0.89 |
| Evaporative Heating Surface (sq ft / m2) | 493 / 45.82 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 493 / 45.82 |
| Evaporative Heating Surface/Cylinder Volume | 209.24 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1462 |
| Same as above plus superheater percentage | 1462 |
| Same as above but substitute firebox area for grate area | 9595 |
| Power L1 | 3656 |
| Power MT | 447.78 |