Data from Lionel Wiener, "Les Chemins de Fer de Bresil", Revue General (Janvier 1923), p. 13. Works numbers were 8110-8111 and 8498-8503 in 1912
A photo of this design shows two outsized domes on a straight boiler. For some reason, D R Carling's definitive book on Twelve-wheeled engines doesn't mention this batch.Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 30, p. 242 and Volume 33, p. 30. See Locobase 13144 for a brief description of the Araraquara. Works numbers were 31064 in June 1907 and 34160 in January 1910.
The 1907 engine was procured through the Schill Seebohm & Company trading company. An indication of the rigorousness of the profile is found in the specs which required the 6 to ascend a maximum grade of 2 1/2% while hauling 175 tons, negotiate a curve radius of 120 metres (394 ft or 9 1/2 degrees), and pull 1,450 tons on the level while not overburdening the 40-lb/yard (20-kg/metre) rail.
Principal Dimensions by Steve Llanso of Sweat House Media | ||
|---|---|---|
| Class | 21 | 6 |
| Locobase ID | 20543 | 13145 |
| Railroad | Araraquara | Araraquara |
| Country | Brazil | Brazil |
| Whyte | 4-8-0 | 4-8-0 |
| Number in Class | 2 | |
| Road Numbers | 21-26 | 6, 13 |
| Gauge | Metre | Metre |
| Number Built | 2 | |
| Builder | Borsig | Burnham, Williams & Co |
| Year | 1912 | 1907 |
| Valve Gear | Stephenson | Stephenson |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 11.48 / 3.50 | 11.75 / 3.58 |
| Engine Wheelbase (ft / m) | 19.77 / 6.03 | 20.42 / 6.22 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.58 | 0.58 |
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 59,525 / 27,000 | 66,000 / 29,937 |
| Engine Weight (lbs / kg) | 78,264 / 35,500 | 81,000 / 36,741 |
| Tender Loaded Weight (lbs / kg) | 66,139 / 30,000 | 50,000 / 22,680 |
| Total Engine and Tender Weight (lbs / kg) | 144,403 / 65,500 | 131,000 / 59,421 |
| Tender Water Capacity (gals / ML) | 2244 / 8.50 | 2500 / 9.47 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 11.60 / 11 | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 25 / 12.50 | 28 / 14 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 38 / 965 | 38 / 965 |
| Boiler Pressure (psi / kPa) | 171.10 / 11.80 | 160 / 11 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16.14" x 20.08" / 410x510 | 16" x 20" / 406x508 |
| Tractive Effort (lbs / kg) | 20,020 / 9080.93 | 18,324 / 8311.64 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 2.97 | 3.60 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 150 - 2" / 51 | |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 13.54 / 4.13 | |
| Firebox Area (sq ft / m2) | 88.30 / 8.21 | |
| Grate Area (sq ft / m2) | 19.38 / 1.80 | 15.40 / 1.43 |
| Evaporative Heating Surface (sq ft / m2) | 1098 / 102 | 1138 / 105.76 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 1098 / 102 | 1138 / 105.76 |
| Evaporative Heating Surface/Cylinder Volume | 230.92 | 244.51 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 3316 | 2464 |
| Same as above plus superheater percentage | 3316 | 2464 |
| Same as above but substitute firebox area for grate area | 14,128 | |
| Power L1 | 3439 | |
| Power MT | 459.50 | |