Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 34, p 345. Works numbers were 33977-33979 in November 1909, 34200 in January 1911.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 36, p 284. Works numbers were 35925-39831 in January 1911.
These were the "small Mallets" (in comparison to the large Mallets shown in Locobase 12931). Each HP cylinder was cast separately and attached to the intermediate saddle under the boiler. Each LP cylinder was cast "in one piece" and bolted together at the center. Operational experience showed that the frames needed "...to be redesigned and reinforced" according to a 5 May 1913 letter.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 40 | 607 |
| Locobase ID | 12931 | 12930 |
| Railroad | Sorocabana | Sorocabana |
| Country | Brazil | Brazil |
| Whyte | 2-6-6-2 | 2-6-6-2 |
| Number in Class | 4 | 6 |
| Road Numbers | 40-43/ 601-604 | 607-612 |
| Gauge | Metre | Metre |
| Number Built | 4 | 6 |
| Builder | Baldwin | Baldwin |
| Year | 1909 | 1911 |
| Valve Gear | Walschaert | Walschaert |
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | 10 / 3.05 | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 28.75 / 8.76 | 23.17 / 7.06 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 42.75 / 13.03 | 59.24 / 18.06 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 26,500 / 12,020 | 22,400 / 10,160 |
| Weight on Drivers (lbs / kg) | 160,000 / 72,575 | 132,000 / 59,874 |
| Engine Weight (lbs / kg) | 190,000 / 86,183 | 157,000 / 71,214 |
| Tender Loaded Weight (lbs / kg) | 90,000 / 40,823 | 90,000 / 40,823 |
| Total Engine and Tender Weight (lbs / kg) | 280,000 / 127,006 | 247,000 / 112,037 |
| Tender Water Capacity (gals / ML) | 4500 / 17.05 | 4500 / 17.05 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 | 37 / 18.50 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 45 / 1143 | 41.25 / 1048 |
| Boiler Pressure (psi / kPa) | 200 / 1380 | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 22" / 432x559 | 16" x 20" / 406x508 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 26" x 22" / 660x508 | 25" x 20" / 635x508 |
| Tractive Effort (lbs / kg) | 33,652 / 15264.31 | 29,938 / 13579.66 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.75 | 4.41 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | 194 - 2.25" / 57 | 200 - 2" / 51 |
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 21 / 6.40 | 17 / 5.18 |
| Firebox Area (sq ft / m2) | 142 / 13.20 | 112 / 10.41 |
| Grate Area (sq ft / m2) | 41.60 / 3.87 | 31.31 / 2.91 |
| Evaporative Heating Surface (sq ft / m2) | 2528 / 234.94 | 1883 / 174.93 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 2528 / 234.94 | 1883 / 174.93 |
| Evaporative Heating Surface/Cylinder Volume | 437.40 | 404.58 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 8320 | 6262 |
| Same as above plus superheater percentage | 8320 | 6262 |
| Same as above but substitute firebox area for grate area | 28,400 | 22,400 |
| Power L1 | 3593 | 2956 |
| Power MT | 297.04 | 296.22 |