Data from DeGolyer, Volume 79, pp. 703+. See also the account at [], last accessed 12 October 2013. Works number was 61940 in July 1936.
Minimum radius in the Barranca yard was 40.93 m (134.25 feet) or approx 43 1/2 degrees. Maximum grade awaiting this oil-burning switcher was 2% for 1 km (0.6 miles). A Baldwin standard oil burner mounted in the front end of the firebox burned "asphaltic base Colombian crude" with an API gravity rating of 20.8 at 60 degrees F (15.5 C).
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 7 |
| Locobase ID | 15475 |
| Railroad | Tropical Oil Company |
| Country | Colombia |
| Whyte | 0-4-0 |
| Number in Class | 1 |
| Road Numbers | 7 |
| Gauge | Metre |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1936 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 5.50 / 1.68 |
| Engine Wheelbase (ft / m) | 5.50 / 1.68 |
| Ratio of driving wheelbase to overall engine wheelbase | 1 |
| Overall Wheelbase (engine & tender) (ft / m) | 23.65 / 7.21 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 37,500 / 17,010 |
| Engine Weight (lbs / kg) | 37,500 / 17,010 |
| Tender Loaded Weight (lbs / kg) | 26,500 / 12,020 |
| Total Engine and Tender Weight (lbs / kg) | 64,000 / 29,030 |
| Tender Water Capacity (gals / ML) | 1000 / 3.79 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 500 / 1892.50 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 31 / 15.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 165 / 1140 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 |
| Tractive Effort (lbs / kg) | 8228 / 3732.16 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.56 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 113 - 1.752" / 45 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 8.50 / 2.59 |
| Firebox Area (sq ft / m2) | 43 / 3.99 |
| Grate Area (sq ft / m2) | 7.60 / 0.71 |
| Evaporative Heating Surface (sq ft / m2) | 468 / 43.48 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 468 / 43.48 |
| Evaporative Heating Surface/Cylinder Volume | 265.93 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1254 |
| Same as above plus superheater percentage | 1254 |
| Same as above but substitute firebox area for grate area | 7095 |
| Power L1 | 3522 |
| Power MT | 414.12 |