Data from Alco class 460 74 Order S-1300 builder's card supplied in February 2023 by Teemu Koivumaki. Works numbers were 61550-61551, 61554 in March 1920.
(Note: Locobase uses Alco's version of the buyer's name. Other variants are Humberto Savoia and Humberto Saboya.)
At the same Alco produced the two Consolidations for this Brazillian railroad construction company (Locobase 21119), it also turned out this trio of wood-burning Ten-wheelers. The fuel required the use of a basket-shaped spark-arresting stack and wood racks on the tender capable of holding three cords.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 2 |
| Locobase ID | 21120 |
| Railroad | Humberto Saboia & Company |
| Country | Brazil |
| Whyte | 4-6- |
| Number in Class | 3 |
| Road Numbers | 2-4 |
| Gauge | Metre |
| Number Built | 3 |
| Builder | Alco-Schenectady |
| Year | 1920 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.83 / 2.39 |
| Engine Wheelbase (ft / m) | 22.50 / 6.86 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 60,000 / 27,216 |
| Engine Weight (lbs / kg) | 73,500 / 33,339 |
| Tender Loaded Weight (lbs / kg) | 63,600 / 28,849 |
| Total Engine and Tender Weight (lbs / kg) | 137,100 / 62,188 |
| Tender Water Capacity (gals / ML) | 2500 / 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) | 43 / 1092 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 |
| Tractive Effort (lbs / kg) | 14,233 / 6455.99 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.22 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 133 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 14.33 / 4.37 |
| Firebox Area (sq ft / m2) | 66 / 6.13 |
| Grate Area (sq ft / m2) | 18.50 / 1.72 |
| Evaporative Heating Surface (sq ft / m2) | 1036 / 96.25 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1036 / 96.25 |
| Evaporative Heating Surface/Cylinder Volume | 253.26 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2960 |
| Same as above plus superheater percentage | 2960 |
| Same as above but substitute firebox area for grate area | 10,560 |
| Power L1 | 3829 |
| Power MT | |