Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 19, p 193 and Volume 20, p. 220. Works numbers were 14210-14215 in January 1895 and 15074-15077 in October 1896.
High-volume Vauclain compounds for the time with 11 1/2" (292 mm) piston valves. Good balance in the heating surfaces and relatively high axle loading. Compounding ratio
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 20, p. 221. (Thanks to Ivo Rutishauser for his 7 February 2026 email correcting the works numbers.) Works numbers were 15092-15097 in October 1896.
Two years after the Paulista took delivery of their quartet Vauclain compounds (Locobase 12136), the railway ordered this sextet of similar, but smaller and less powerful Vauclain compounds that rolled on three short tons less axle loading.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 44, p. 23. Works numbers were 38819-38821 in November 1912.
Data from Lionel Wiener, Les chemins de fer du Breñsil (Paris: H. Dunod et E Pinat, Editeurs, 1912), p. 115. Works numbers were 3878-3880 in 1898.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||||
|---|---|---|---|---|
| Class | 42 | 58 | 80 | unknown |
| Locobase ID | 12136 | 12224 | 13659 | 20854 |
| Railroad | Paulista | Paulista | Paulista | Paulista |
| Country | Brazil | Brazil | Brazil | Brazil |
| Whyte | 2-8-0 | 2-8-0 | 2-8-0 | 2-8-0 |
| Number in Class | 10 | 6 | 3 | 3 |
| Road Numbers | 42-47, 54-57 | 58-63/141-146 | 80-82 / 180-182 | |
| Gauge | 5'3" | 5'3" | 5'3" | Metre |
| Number Built | 10 | 6 | 3 | 3 |
| Builder | Burnham, Williams & Co | Burnham, Williams & Co | Baldwin | Beyer, Peacock |
| Year | 1894 | 1896 | 1912 | 1898 |
| Valve Gear | Stephenson | Stephenson | Walschaert | Stephenson |
| Locomotive Length and Weight | ||||
| Driver Wheelbase (ft / m) | 14 / 4.27 | 14 / 4.27 | 15 / 4.57 | 14.67 / 4.47 |
| Engine Wheelbase (ft / m) | 22.50 / 6.86 | 21.92 / 6.68 | 23.50 / 7.16 | 18.92 / 5.77 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.62 | 0.64 | 0.64 | 0.78 |
| Overall Wheelbase (engine & tender) (ft / m) | 48.25 / 14.71 | 47.58 / 14.50 | 51.21 / 15.61 | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 36,945 | 30,856 | ||
| Weight on Drivers (lbs / kg) | 152,000 / 68,946 | 123,424 / 55,984 | 164,000 / 74,389 | 56,218 / 25,500 |
| Engine Weight (lbs / kg) | 170,000 / 77,111 | 184,000 / 83,461 | 69,446 / 31,500 | |
| Tender Loaded Weight (lbs / kg) | 80,000 | 100,000 / 45,359 | 53,572 / 24,300 | |
| Total Engine and Tender Weight (lbs / kg) | 250,000 | 284,000 / 128,820 | 123,018 / 55,800 | |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 | 3250 / 12.31 | 5000 / 18.94 | 1848 / 7 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 4.20 / 3.80 | |||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 63 / 31.50 | 51 / 25.50 | 68 / 34 | 23 / 11.50 |
| Geometry Relating to Tractive Effort | ||||
| Driver Diameter (in / mm) | 50 / 1270 | 50 / 1270 | 50 / 1270 | 45 / 1143 |
| Boiler Pressure (psi / kPa) | 180 / 1240 | 180 / 1240 | 190 / 1310 | 211.80 / 1460 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 28" / 381x711 | 13.5" x 26" / 343x660 | 21" x 28" / 533x711 | 15.75" x 20" / 400x508 (1) |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 25" x 28" / 635x711 | 23" x 26" / 584x660 | 22.99" x 22.99" / 584x584 (1) | |
| Tractive Effort (lbs / kg) | 28,350 / 12859.36 | 21,569 / 9783.55 | 39,884 / 18091.10 | 14,094 / 6392.94 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.36 | 5.72 | 4.11 | 3.99 |
| Heating Ability | ||||
| Tubes (number - dia) (in / mm) | 301 - 2" / 51 | 252 - 2" / 51 | 385 - 2" / 51 | 205 - 1.614" / 41 |
| Flues (number - dia) (in / mm) | ||||
| Flue/Tube length (ft / m) | 12 / 3.66 | 12.25 / 3.73 | 13.83 / 4.22 | 8.33 / 2.54 |
| Firebox Area (sq ft / m2) | 153.70 / 14.28 | 120 / 11.15 | 178 / 16.54 | 75.99 / 7.06 |
| Grate Area (sq ft / m2) | 32.40 / 3.01 | 32 / 2.97 | 35.70 / 3.32 | 12.49 / 1.16 |
| Evaporative Heating Surface (sq ft / m2) | 2012 / 186.99 | 1720 / 159.85 | 2950 / 274.06 | 802 / 74.50 |
| Superheating Surface (sq ft / m2) | ||||
| Combined Heating Surface (sq ft / m2) | 2012 / 186.99 | 1720 / 159.85 | 2950 / 274.06 | 802 / 74.50 |
| Evaporative Heating Surface/Cylinder Volume | 351.33 | 399.31 | 262.81 | 355.66 |
| Computations Relating to Power Output (More Information) | ||||
| Robert LeMassena's Power Computation | 5832 | 5760 | 6783 | 2645 |
| Same as above plus superheater percentage | 5832 | 5760 | 6783 | 2645 |
| Same as above but substitute firebox area for grate area | 27,666 | 21,600 | 33,820 | 16,095 |
| Power L1 | 2622 | 2783 | 5417 | 3400 |
| Power MT | 152.12 | 198.84 | 291.28 | 533.33 |