Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 79, p.218. Works numbers were 59611-59613 in October 1926.
Rolling on 42.23 lb/yard (21 kg/metre) rail, these wood-burning Pacifics pulled the SOe of Bahia's passenger trains. Endowed with a useful degree of superheat, the engines admitted this hotter steam to the cylinders through 8" (203 mm) piston valves. Locobase wonders if the class was operated at a lower boiler pressure than specified or if the engines' adhesion weight increased substantially in service. They later operated on the EF de Nazareth, which was owned by the CV de Sudoeste de Bahia.
Principal Dimensions by Steve Llanso of Sweat House Media | |
|---|---|
| Class | 25 |
| Locobase ID | 15439 |
| Railroad | Sudoeste da Bahia |
| Country | Brazil |
| Whyte | 4-6-2 |
| Number in Class | 3 |
| Road Numbers | 25-27 |
| Gauge | Metre |
| Number Built | 3 |
| Builder | Baldwin |
| Year | 1925 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.50 / 2.90 |
| Engine Wheelbase (ft / m) | 27.17 / 8.28 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 50.17 / 15.29 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 66,000 / 29,937 |
| Engine Weight (lbs / kg) | 109,000 / 49,442 |
| Tender Loaded Weight (lbs / kg) | 66,000 / 29,937 |
| Total Engine and Tender Weight (lbs / kg) | 175,000 / 79,379 |
| Tender Water Capacity (gals / ML) | 3170 / 12.01 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 37 / 18.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 50 / 1270 |
| Boiler Pressure (psi / kPa) | 180 / 12.40 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 22" / 432x559 |
| Tractive Effort (lbs / kg) | 19,455 / 8824.65 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.39 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 107 - 2" / 51 |
| Flues (number - dia) (in / mm) | 18 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 16 / 4.88 |
| Firebox Area (sq ft / m2) | 102 / 9.48 |
| Grate Area (sq ft / m2) | 24.90 / 2.31 |
| Evaporative Heating Surface (sq ft / m2) | 1397 / 129.78 |
| Superheating Surface (sq ft / m2) | 345 / 32.05 |
| Combined Heating Surface (sq ft / m2) | 1742 / 161.83 |
| Evaporative Heating Surface/Cylinder Volume | 241.71 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4482 |
| Same as above plus superheater percentage | 5378 |
| Same as above but substitute firebox area for grate area | 22,032 |
| Power L1 | 13,008 |
| Power MT | 1303.53 |