Data from Baldwin Locomotive Works Specification for Engines, 1888, as digitized by the DeGolyer Library of Southern Methodist University Vol 17, 191. Works numbers were 12448-12451 in January 1892.
This quartet of Vauclain compounds was rated to pull 185 trailing tons up a 2% grade at 40 km/h (25 mph), which was a pretty impressive requirement for Eight-wheelers on any railway. The piston valves measured 9 3/4" in diameter. A later set of 3 with slightly different specs can be found in Locobase 12191.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 20, 111. Works numbers were 14754-14756 in March 1896.
This was the second batch of Eight-wheeler Vauclain compounds; the first four from 1892 appear in Locobase 12191. Differences included piston valves measuring 10 1/2" in diameter, longer engine wheelbase, and larger tender.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 38 | 48 |
| Locobase ID | 12016 | 12191 |
| Railroad | Paulista | Paulista |
| Country | Brazil | Brazil |
| Whyte | 4-4-0 | 4-4-0 |
| Number in Class | 4 | 3 |
| Road Numbers | 38-41 / 21-22 | 48-50 / 30-32 |
| Gauge | 5'3" | 5'3" |
| Number Built | 4 | 3 |
| Builder | Burnham, Williams & Co | Burnham, Williams & Co |
| Year | 1892 | 1896 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 7.83 / 2.39 | 7.83 / 2.39 |
| Engine Wheelbase (ft / m) | 21.75 / 6.63 | 22.17 / 6.63 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 47.75 | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | ||
| Engine Weight (lbs / kg) | ||
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | 2500 / 9.47 | 4000 / 9.47 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | ||
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 66 / 1676 | 66 / 1676 |
| Boiler Pressure (psi / kPa) | 180 / 1240 | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 24" / 305x610 | 12" x 24" / 305x610 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 20" x 24" / 508x610 | 20" x 24" / 508x610 |
| Tractive Effort (lbs / kg) | 11,782 / 5344.23 | 11,782 / 5344.23 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | ||
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 220 - 2" / 51 | 220 - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 11.50 / 3.51 | 11.50 / 3.51 |
| Firebox Area (sq ft / m2) | 117 / 10.87 | 117 / 10.87 |
| Grate Area (sq ft / m2) | 23.30 / 2.17 | 23.30 / 2.17 |
| Evaporative Heating Surface (sq ft / m2) | 1427 / 132.62 | 1427 / 132.62 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1427 / 132.62 | 1427 / 132.62 |
| Evaporative Heating Surface/Cylinder Volume | 454.23 | 454.23 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 4194 | 4194 |
| Same as above plus superheater percentage | 4194 | 4194 |
| Same as above but substitute firebox area for grate area | 21,060 | 21,060 |
| Power L1 | 4565 | 4565 |
| Power MT | ||