Data from DeGolyer, Vol 72, pp. 163+ and Vol 79, pp. 280+. Works numbers were 58136
in December 1924 and 60819 in May 1929.
Adding the special character to the c in Poto Gordo brings out the real meaning of the phrase. Locobase thought it might translate as "chubby" (literally "little fat"?), but instead the name refers to a productive well of water. The plantation was in the district of Spo Sebastipo in Rio de Janeiro State, not far to the northeast of Porto Alegre.
These little wood-burning Ten-wheelers Rushton Improved spark-arresting cabbage stacks. The specs don't say much about the locomotives' operating conditions, noting only that minimum curve radii were 160 feet (48.8 m). They were expected to meet the requirements laid out by the much larger Leopoldina Railway.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Nilo |
| Locobase ID | 15448 |
| Railroad | Usina Poto Gordo |
| Country | Brazil |
| Whyte | 2-6-0 |
| Number in Class | 2 |
| Road Numbers | |
| Gauge | Metre |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1924 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 13.83 / 4.22 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.58 |
| Overall Wheelbase (engine & tender) (ft / m) | 33.52 / 10.22 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 30,000 / 13,608 |
| Engine Weight (lbs / kg) | 35,000 / 15,876 |
| Tender Loaded Weight (lbs / kg) | 37,000 / 16,783 |
| Total Engine and Tender Weight (lbs / kg) | 72,000 / 32,659 |
| Tender Water Capacity (gals / ML) | 1500 / 5.68 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 17 / 8.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 170 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 10" x 16" / 254x406 |
| Tractive Effort (lbs / kg) | 7006 / 3177.87 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.28 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 78 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 7.58 / 2.31 |
| Firebox Area (sq ft / m2) | 44 / 4.09 |
| Grate Area (sq ft / m2) | 9.10 / 0.85 |
| Evaporative Heating Surface (sq ft / m2) | 312 / 28.99 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 312 / 28.99 |
| Evaporative Heating Surface/Cylinder Volume | 214.52 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1547 |
| Same as above plus superheater percentage | 1547 |
| Same as above but substitute firebox area for grate area | 7480 |
| Power L1 | 3420 |
| Power MT | 753.98 |