Data from Record of Recent Construction #91 (Baldwin Locomotive Works, 1918), p.20-21; see also DeGolyer, Vol 54, pp. 379+. Works number was 45071 in February 1917.
Requirements for this engine included the low axle loading, the ability to negotiate 280-ft curve radii, and operations at altitudes of up to 12,000 feet. The wheelbase was short, which likely accounts for the short strokes in the cylinders as well. 9" (229 mm) piston valves fed the HP cylinders while 11" (279 mm) valves supplied the LP cylinders.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 201 |
| Locobase ID | 10994 |
| Railroad | Andes Copper Mining |
| Country | Chile |
| Whyte | 2-6-6-2 |
| Number in Class | 1 |
| Road Numbers | 201 |
| Gauge | Metre |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1917 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 8 / 2.44 |
| Engine Wheelbase (ft / m) | 23.17 / 7.06 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.35 |
| Overall Wheelbase (engine & tender) (ft / m) | 60.17 / 18.34 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 22,000 / 9979 |
| Weight on Drivers (lbs / kg) | 130,950 / 59,398 |
| Engine Weight (lbs / kg) | 157,100 / 71,259 |
| Tender Loaded Weight (lbs / kg) | 80,900 / 36,696 |
| Total Engine and Tender Weight (lbs / kg) | 238,000 / 107,955 |
| 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) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 25" x 20" / 635x508 |
| Tractive Effort (lbs / kg) | 29,404 / 13337.45 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.45 |
| 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) | 31.50 / 2.93 |
| Evaporative Heating Surface (sq ft / m2) | 1566 / 145.54 |
| Superheating Surface (sq ft / m2) | 311 / 28.90 |
| Combined Heating Surface (sq ft / m2) | 1877 / 174.44 |
| Evaporative Heating Surface/Cylinder Volume | 336.47 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 6300 |
| Same as above plus superheater percentage | 7371 |
| Same as above but substitute firebox area for grate area | 26,442 |
| Power L1 | 6074 |
| Power MT | 613.56 |