Data from Alco class 462 S 127 Order C-637 builder's card supplied in February 2023 by Teemu Koivumaki..Works numbers were 62420, 62503-62505 in November 1920.
Brokers Carlos Barbosa and Alfredo Chaves ordered this quartet of relatively big and powerful Pacifics from the longer-lived Paterson, NJ subsidiary of the American Locomotive Company. By this time, a wood-burning grate was rare in new locomotives; this group's tenders carried 3 1/2 cords.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 11 |
| Locobase ID | 21126 |
| Railroad | Rio Grande do Sul |
| Country | Brazil |
| Whyte | 4-6-2 |
| Number in Class | 4 |
| Road Numbers | 11-14 |
| Gauge | Metre |
| Number Built | 4 |
| Builder | Alco-Cooke |
| Year | 1920 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9.50 / 2.90 |
| Engine Wheelbase (ft / m) | 26.50 / 8.08 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 |
| Overall Wheelbase (engine & tender) (ft / m) | 52.06 / 15.87 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 90,500 / 41,050 |
| Engine Weight (lbs / kg) | 135,000 / 61,235 |
| Tender Loaded Weight (lbs / kg) | 87,000 / 39,463 |
| Total Engine and Tender Weight (lbs / kg) | 222,000 / 100,698 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 50 / 25 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 54 / 1372 |
| Boiler Pressure (psi / kPa) | 170 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 |
| Tractive Effort (lbs / kg) | 25,116 / 11392.44 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.60 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 120 - 2" / 51 |
| Flues (number - dia) (in / mm) | 21 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 15.75 / 4.80 |
| Firebox Area (sq ft / m2) | 106 / 9.85 |
| Grate Area (sq ft / m2) | 27.80 / 2.58 |
| Evaporative Heating Surface (sq ft / m2) | 1553 / 144.28 |
| Superheating Surface (sq ft / m2) | 395 / 36.70 |
| Combined Heating Surface (sq ft / m2) | 1948 / 180.98 |
| Evaporative Heating Surface/Cylinder Volume | 182.02 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4726 |
| Same as above plus superheater percentage | 5671 |
| Same as above but substitute firebox area for grate area | 21,624 |
| Power L1 | 10,110 |
| Power MT | 738.85 |