Data from [], supplemented by DeGolyer, Vol 66, pp. 115+. Works numbers were 54857-54858 in June 1921.
Smallish metre-gauge articulated tank with a good degree of superheat and 8" (203 mm) piston valves. The two served the Sur on 60 lb/yard (30 kg/metre) rail that climbed 3% grades and went around curves as sharp as 262 feet (80 metres) or 22 degrees. At a later date, the pair went to the Norte and were renumbered 12-13.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 9 |
| Locobase ID | 4762 |
| Railroad | FC del Sur |
| Country | Colombia |
| Whyte | 2-6-6-2T |
| Number in Class | 2 |
| Road Numbers | 9-10 |
| Gauge | metre |
| Number Built | 2 |
| Builder | Baldwin |
| Year | 1921 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.67 / 2.34 |
| Engine Wheelbase (ft / m) | 23.33 / 7.11 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.33 |
| Overall Wheelbase (engine & tender) (ft / m) | 36.83 / 11.23 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 122,000 / 55,338 |
| Engine Weight (lbs / kg) | 143,000 / 64,864 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1800 / 6.82 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.60 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 34 / 17 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 38 / 965 |
| Boiler Pressure (psi / kPa) | 190 / 1310 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 13" x 20" / 330x508 |
| Low Pressure Cylinders (dia x stroke) (in / mm) | 20.5" x 20" / 521x508 |
| Tractive Effort (lbs / kg) | 20,490 / 9294.12 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.95 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 68 - 2" / 51 |
| Flues (number - dia) (in / mm) | 12 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 14 / 4.27 |
| Firebox Area (sq ft / m2) | 67 / 6.22 |
| Grate Area (sq ft / m2) | 24 / 2.23 |
| Evaporative Heating Surface (sq ft / m2) | 797 / 74.04 |
| Superheating Surface (sq ft / m2) | 212 / 19.70 |
| Combined Heating Surface (sq ft / m2) | 1009 / 93.74 |
| Evaporative Heating Surface/Cylinder Volume | 259.40 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 4560 |
| Same as above plus superheater percentage | 5518 |
| Same as above but substitute firebox area for grate area | 15,403 |
| Power L1 | 4788 |
| Power MT | 519.13 |