Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 66, p.196. Works numbers were 55549-55551 in May 1922.
Passenger power on this lightly built, rough-riding road included these three wood-burning Pacifics. Although a wood burner, this design generated a good degree of superheat and used outside constant-lead radial valve gear to actuate 8" (203 mm) piston valves.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 501 |
| Locobase ID | 15105 |
| Railroad | Federaux de l'est Bresilien |
| Country | Brazil |
| Whyte | 4-6-2 |
| Number in Class | 3 |
| Road Numbers | 501-503 |
| Gauge | Metre |
| Number Built | 3 |
| Builder | Baldwin |
| Year | 1922 |
| 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) | 50.35 / 15.35 |
| 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 / 1240 |
| 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) | 24.50 / 2.28 |
| 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 | 4410 |
| Same as above plus superheater percentage | 5292 |
| Same as above but substitute firebox area for grate area | 22,032 |
| Power L1 | 13,008 |
| Power MT | 1303.53 |