Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 66, pp. 258+. See also Roy V Wright (Ed.), Locomotive Cyclopedia - 6th Edition (New York: Simmons-Boardman, 1922), p. 1015; "New Meter Gage [sic] Locomotives for South America, Railway Age, Volume 67, No 20 (12 November 1920), pp. 839-841; and Eduardo Jose de Jesus Coelho, Brazilian articulated steam locomotives (Memoria do Trem, 2003), p. 28. (Thanks to Teemu Koivumaki whose 2023 email included a comprehensive spreadsheet of Brazilian steam locomotive builders, works numbers, and owners.) Works numbers were 53061in February 1919, 53065-53069 in March.
This was the biggest metre-gauge locomotive operating in South America at the time of its introduction and were the very first 2-10-2s to operate South America. Steam entered the cylinders through 10" (254 mm) piston valves. The firebox could burn coal or wood and the engines were delivered with removable plates in the grate. Only the front pair of drivers turned in Franklin lateral motion boxes.
Coelho wrote that this sextet opened a period in which the Paulista and other Brazilian roads preferred large non-articulated locomotives because they could run at higher speeds and burned coal more economically. They tackled 2% grades and traveled around curve radii of 394 feet (120.1 metres).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 91/760 |
| Locobase ID | 15123 |
| Railroad | Paulista |
| Country | Brazil |
| Whyte | 2-10-2 |
| Number in Class | 6 |
| Road Numbers | 91-96/760-765 |
| Gauge | Metre |
| Number Built | 6 |
| Builder | Baldwin |
| Year | 1920 |
| Valve Gear | Southern |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 15.83 / 4.82 |
| Engine Wheelbase (ft / m) | 30.33 / 9.24 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.52 |
| Overall Wheelbase (engine & tender) (ft / m) | 57.42 / 17.50 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 26,455 / 12,000 |
| Weight on Drivers (lbs / kg) | 130,000 / 58,967 |
| Engine Weight (lbs / kg) | 164,500 / 74,616 |
| Tender Loaded Weight (lbs / kg) | 91,500 / 41,504 |
| Total Engine and Tender Weight (lbs / kg) | 256,000 / 116,120 |
| Tender Water Capacity (gals / ML) | 4500 / 17.05 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 8 / 7 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 43 / 21.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 22" / 508x559 |
| Tractive Effort (lbs / kg) | 33,838 / 15348.68 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.84 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 129 - 2" / 51 |
| Flues (number - dia) (in / mm) | 22 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 19.08 / 5.82 |
| Firebox Area (sq ft / m2) | 129 / 11.98 |
| Grate Area (sq ft / m2) | 40 / 3.72 |
| Evaporative Heating Surface (sq ft / m2) | 2000 / 185.80 |
| Superheating Surface (sq ft / m2) | 500 / 46.45 |
| Combined Heating Surface (sq ft / m2) | 2500 / 232.25 |
| Evaporative Heating Surface/Cylinder Volume | 250.02 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 7600 |
| Same as above plus superheater percentage | 9120 |
| Same as above but substitute firebox area for grate area | 29,412 |
| Power L1 | 11,879 |
| Power MT | 1007.26 |