Data from Wiener (1930).
Meter Prairie Mallets identical to those delivered by Alco and Henschel to Brazil in the same years except for the superheating in these engines.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 3607 |
| Railroad | Chilean State |
| Country | Chile |
| Whyte | 2-6-6-2 |
| Number in Class | |
| Road Numbers | |
| Gauge | Metre |
| Number Built | |
| Builder | several |
| Year | 1913 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 36 / 10.97 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.22 |
| Overall Wheelbase (engine & tender) (ft / m) | 60.17 / 18.34 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 131,000 / 59,421 |
| Engine Weight (lbs / kg) | 157,000 / 71,214 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | 157,000 / 71,214 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1800 / 6813 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 36 / 18 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 204.50 / 1410 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 25.5" x 20" / 648x508 |
| Tractive Effort (lbs / kg) | 30,409 / 13793.31 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.31 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 121 - 2" / 51 |
| Flues (number - dia) (in / mm) | 16 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 17 / 5.18 |
| Firebox Area (sq ft / m2) | 113 / 10.50 |
| Grate Area (sq ft / m2) | 32 / 2.97 |
| Evaporative Heating Surface (sq ft / m2) | 1525 / 141.73 |
| Superheating Surface (sq ft / m2) | 310 / 28.81 |
| Combined Heating Surface (sq ft / m2) | 1835 / 170.54 |
| Evaporative Heating Surface/Cylinder Volume | 327.66 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 6544 |
| Same as above plus superheater percentage | 7656 |
| Same as above but substitute firebox area for grate area | 27,037 |
| Power L1 | 5909 |
| Power MT | 596.66 |