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.
In 1920, the state of Minas Gerais appropriated money to begin building the Paracatu Railway. The eponymous river ran through a rich goldfield, which stimulated interest in the railway. A small, lightly built line, the PRwy had curves with 80 metre (263 foot) radii and grades of 2 1/2%. A specification note implies tight clearances for this wood-burning Pacific when it says that the "boiler and engine when erected, to be as low as possible, the boiler centre line above top of rail to be less than 2.30 metres [7 feet 6 1/2 inches]."
Like many small Brazilian engines of the time, the 80 resorted to superheat to increase power and admitted steam to its cylinders through 8" (203 mm) piston valves.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 80 |
| Locobase ID | 15442 |
| Railroad | Paracatu |
| Country | Brazil |
| Whyte | 4-6-2 |
| Number in Class | 1 |
| Road Numbers | 80 |
| Gauge | Metre |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1929 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8.50 / 2.59 |
| Engine Wheelbase (ft / m) | 24 / 7.32 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 48.46 / 14.77 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 18,734 / 8498 |
| Weight on Drivers (lbs / kg) | 56,000 / 25,401 |
| Engine Weight (lbs / kg) | 95,000 / 43,091 |
| Tender Loaded Weight (lbs / kg) | 57,000 / 25,855 |
| Total Engine and Tender Weight (lbs / kg) | 152,000 / 68,946 |
| Tender Water Capacity (gals / ML) | 2650 / 10.04 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 31 / 15.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 |
| Tractive Effort (lbs / kg) | 13,631 / 6182.92 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.11 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 77 - 2" / 51 |
| Flues (number - dia) (in / mm) | 14 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 14.25 / 4.34 |
| Firebox Area (sq ft / m2) | 96 / 8.92 |
| Grate Area (sq ft / m2) | 27.30 / 2.54 |
| Evaporative Heating Surface (sq ft / m2) | 946 / 87.89 |
| Superheating Surface (sq ft / m2) | 219 / 20.35 |
| Combined Heating Surface (sq ft / m2) | 1165 / 108.24 |
| Evaporative Heating Surface/Cylinder Volume | 265.48 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4914 |
| Same as above plus superheater percentage | 5848 |
| Same as above but substitute firebox area for grate area | 20,563 |
| Power L1 | 12,584 |
| Power MT | 1486.23 |