Data from "Locomotives for Peru", Locomotive Firemen's and Enginemen's Magazine, Volume 42 (June 1907), pp. 757-759; and "Catalogue 10036--Locomotives for Export", American Locomotive Company (New York City, April 1910), pp. 44-45. Works numbers were 41509-41518 in January 1907.
These oil-burning Ten-wheelers were intended for service on a railway that climbed to 15,600 feet above sea level and featured 3-4% grades. They had a somewhat unusual combination in a saturated engine of using Walschaert gear to operate the cylinders' slide valves. The steep grades led to the inclusion of a two 9 1/2 inch Westinghouse air pumps and Le Chatelier water brakes described in Locobases 3458 and 13777.
They were latterly owned by the Callao Oroya Railway, where their road numbers ranged from 50 to 59.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 47 |
| Locobase ID | 15972 |
| Railroad | Southern & Central |
| Country | Peru |
| Whyte | 4-6-0 |
| Number in Class | 10 |
| Road Numbers | 47-56 |
| Gauge | Std |
| Number Built | 10 |
| Builder | Alco-Rogers |
| Year | 1904 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 13 / 3.96 |
| Engine Wheelbase (ft / m) | 23.17 / 7.06 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | 47.42 / 14.45 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 104,000 / 47,174 |
| Engine Weight (lbs / kg) | 141,000 / 63,957 |
| Tender Loaded Weight (lbs / kg) | 91,000 / 41,277 |
| Total Engine and Tender Weight (lbs / kg) | 232,000 / 105,234 |
| Tender Water Capacity (gals / ML) | 4000 / 15.15 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2000 / 7570 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 58 / 29 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 58 / 1473 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 |
| Tractive Effort (lbs / kg) | 27,511 / 12478.79 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 3.78 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 272 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 12.75 / 3.89 |
| Firebox Area (sq ft / m2) | 136 / 12.64 |
| Grate Area (sq ft / m2) | 29.25 / 2.72 |
| Evaporative Heating Surface (sq ft / m2) | 1952 / 181.41 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1952 / 181.41 |
| Evaporative Heating Surface/Cylinder Volume | 228.78 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5850 |
| Same as above plus superheater percentage | 5850 |
| Same as above but substitute firebox area for grate area | 27,200 |
| Power L1 | 5964 |
| Power MT | 379.28 |