Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 54, p. 371. Works number was 45915 in 1917.
This side-tank Prairie was of the same size and weight as the long-running series of twelve 2-6-4Ts built by Robert Stephenson for the Arauco from 1889-1912 (Locobase 16024).
Given the identical power dimensions, grate area, and adhesion wheelbase, Locobase suspects this was a single variant built with a separate tender by a North American supplier. Its firebox's brick arch may also represented a change from the earlier 2-6-4Ts.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Presidente Sanfuentes |
| Locobase ID | 14519 |
| Railroad | Arauco Company, Ltd |
| Country | Chile |
| Whyte | 2-6-2T |
| Number in Class | 1 |
| Road Numbers | 26 |
| Gauge | 5'6" |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1917 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 9 / 2.74 |
| Engine Wheelbase (ft / m) | 22.17 / 6.76 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.41 |
| Overall Wheelbase (engine & tender) (ft / m) | 22.17 / 6.76 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 79,000 / 35,834 |
| Engine Weight (lbs / kg) | 107,900 / 48,943 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1450 / 5.49 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2 / 1.80 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 170 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 22" / 381x559 |
| Tractive Effort (lbs / kg) | 17,030 / 7724.69 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.64 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 154 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10 / 3.05 |
| Firebox Area (sq ft / m2) | 77 / 7.15 |
| Grate Area (sq ft / m2) | 17.60 / 1.64 |
| Evaporative Heating Surface (sq ft / m2) | 877 / 81.48 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 877 / 81.48 |
| Evaporative Heating Surface/Cylinder Volume | 194.90 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2992 |
| Same as above plus superheater percentage | 2992 |
| Same as above but substitute firebox area for grate area | 13,090 |
| Power L1 | 3338 |
| Power MT | 279.46 |