FC del Potrerillos 2-8-2 Locomotives in Chile
Class Details by Steve Llanso of Sweat House Media
Class 50 (Locobase 15403)
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 78, pp. 312+. See also the description of the railway at the Los Andinos website at [
], last accessed 1 September 2013. Works numbers were 58376-58377, 58431 in May 1925 and 59471 in September 1926.
Although the operating conditions on the Andes Copper Mining Company's railway had not changed, traffic levels certainly had. So the ACMC ordered these much larger oil-burning Mikados. Even they had a short stroke, the 50s' cylinder volume increased by more than 35%. They were still fed their superheated steam through 10" (254 mm) piston valves.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 50 |
| Locobase ID | 15403 |
| Railroad | FC del Potrerillos |
| Country | Chile |
| Whyte | 2-8-2 |
| Number in Class | 3 |
| Road Numbers | 50-53 |
| Gauge | Metre |
| Number Built | 3 |
| Builder | Baldwin |
| Year | 1925 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 12 / 3.66 |
| Engine Wheelbase (ft / m) | 27.25 / 8.31 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.44 |
| Overall Wheelbase (engine & tender) (ft / m) | 55.90 / 17.04 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 32,000 / 14,515 |
| Weight on Drivers (lbs / kg) | 128,000 / 58,060 |
| Engine Weight (lbs / kg) | 162,000 / 73,482 |
| Tender Loaded Weight (lbs / kg) | 98,000 / 44,452 |
| Total Engine and Tender Weight (lbs / kg) | 260,000 / 117,934 |
| Tender Water Capacity (gals / ML) | 4500 / 17.05 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2000 / 7570 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 53 / 26.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 42 / 1067 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 20" x 22" / 508x559 |
| Tractive Effort (lbs / kg) | 32,057 / 14540.83 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.99 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 182 - 2" / 51 |
| Flues (number - dia) (in / mm) | 28 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 15 / 4.57 |
| Firebox Area (sq ft / m2) | 136 / 12.64 |
| Grate Area (sq ft / m2) | 38.70 / 3.60 |
| Evaporative Heating Surface (sq ft / m2) | 2145 / 199.35 |
| Superheating Surface (sq ft / m2) | 473 / 43.96 |
| Combined Heating Surface (sq ft / m2) | 2618 / 243.31 |
| Evaporative Heating Surface/Cylinder Volume | 268.14 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 6966 |
| Same as above plus superheater percentage | 8220 |
| Same as above but substitute firebox area for grate area | 28,886 |
| Power L1 | 11,155 |
| Power MT | 768.52 |