Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 39, p. 225. Works numbers were 35597-35598 in March 1911.
This pair of 10-wheeled tanks was pretty small for the gauge. Two more broad-gaugers shown in Locobase 13863 weren't much bigger.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 39, p. 225. Works numbers were 35597-35598 in November 1910.
Locobase 13862 shows the metre-gauge tanks that worked at the Obras do Porto in Rio. The current pair straddled a considerably wider gauge and were commensurately bigger.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 2 | 51 |
| Locobase ID | 13862 | 13863 |
| Railroad | Rio Port Works (Obras do Porto) | Rio Port Works (Obras do Porto) |
| Country | Brazil | Brazil |
| Whyte | 2-4-4T | 2-4-4T |
| Number in Class | 2 | 2 |
| Road Numbers | 2-3 | 51-52 |
| Gauge | Metre | 5'3" |
| Number Built | 2 | 2 |
| Builder | Baldwin | Baldwin |
| Year | 1910 | 1911 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 5 / 1.52 | 6.50 / 1.98 |
| Engine Wheelbase (ft / m) | 21.67 / 6.61 | 25.75 / 7.85 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.23 | 0.25 |
| Overall Wheelbase (engine & tender) (ft / m) | 21.67 / 6.61 | 25.75 / 7.85 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 20,000 / 9072 | 43,000 / 19,504 |
| Engine Weight (lbs / kg) | 40,000 / 18,144 | 71,500 / 32,432 |
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | 40,000 / 18,144 | 71,500 / 32,432 |
| Tender Water Capacity (gals / ML) | 500 / 1.89 | 700 / 2.65 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 17 / 8.50 | 36 / 18 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 37 / 940 | 46 / 1168 |
| Boiler Pressure (psi / kPa) | 160 / 1100 | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 9" x 16" / 229x406 | 12" x 20" / 305x508 |
| Tractive Effort (lbs / kg) | 4764 / 2160.92 | 8515 / 3862.34 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.20 | 5.05 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 76 - 1.5" / 38 | 98 - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 8.67 / 2.64 | 10.08 / 3.07 |
| Firebox Area (sq ft / m2) | 42 / 3.90 | 65 / 6.04 |
| Grate Area (sq ft / m2) | 6.50 / 0.60 | 12.90 / 1.20 |
| Evaporative Heating Surface (sq ft / m2) | 298 / 27.68 | 578 / 53.70 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 298 / 27.68 | 578 / 53.70 |
| Evaporative Heating Surface/Cylinder Volume | 252.95 | 220.78 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 1040 | 2064 |
| Same as above plus superheater percentage | 1040 | 2064 |
| Same as above but substitute firebox area for grate area | 6720 | 10,400 |
| Power L1 | 4255 | 4231 |
| Power MT | 938.07 | 433.85 |