Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 44, p. 225. See Gabriel Poveda Ramos,"El Antiguo Ferrocarril del Pacifico"archived at the Academia Colombiana de Ciencias Economicas website under [], last accessed 16 January 2012 for an excellent Spanish-language history of this difficult, long-gestating route to the Pacific Ocean at Buenaventura. Works numbers were 39390-39391 in March 1913.
Camacho Rolden & Van Sickel ordered several batches of locomotives from Baldwin on behalf of the FC del P. An earlier pair of Moguls is shown in Locobase 13729. These much smaller Prairies came several months later. A third locomotive of exactly the same design went first to the Santander-Timba in 1926; see Locobase 15370.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 18 |
| Locobase ID | 13728 |
| Railroad | Ferrocarril del Pacifico |
| Country | Colombia |
| Whyte | 2-6-2 |
| Number in Class | 2 |
| Road Numbers | 18-19 |
| Gauge | 3' |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1913 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.67 / 2.34 |
| Engine Wheelbase (ft / m) | 21.33 / 6.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.36 |
| Overall Wheelbase (engine & tender) (ft / m) | 39.37 / 12 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 32,500 / 14,742 |
| Engine Weight (lbs / kg) | 45,500 / 20,638 |
| Tender Loaded Weight (lbs / kg) | 16,000 / 7257 |
| Total Engine and Tender Weight (lbs / kg) | 61,500 / 27,895 |
| Tender Water Capacity (gals / ML) | 800 / 3.03 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 18 / 9 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 36 / 914 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 |
| Tractive Effort (lbs / kg) | 7314 / 3317.58 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.44 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 63 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.50 / 3.20 |
| Firebox Area (sq ft / m2) | 56 / 5.20 |
| Grate Area (sq ft / m2) | 7.30 / 0.68 |
| Evaporative Heating Surface (sq ft / m2) | 400 / 37.16 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 400 / 37.16 |
| Evaporative Heating Surface/Cylinder Volume | 227.29 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1168 |
| Same as above plus superheater percentage | 1168 |
| Same as above but substitute firebox area for grate area | 8960 |
| Power L1 | 3709 |
| Power MT | 754.79 |