Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Vol 79, pp. 120+. Works numbers was 59970 in April 1927, 60008-60009 in May, 60568-60570 in July 1928, 60585 in August,.
Locobase 15067 shows some small superheated Mikados bought by the FC de Amaga in the mid-1920s. At around the time the Amaga merged with the Antioquia, the latter road procured a duplicate direct from Eddystone. Like the other engines, this one used its 8" (203 mm) piston valves to admit the superheated steam to the cylinders and supplemented its firebox heating surface area with 13 sq ft (1.2 sq m) of arch tubes.
Two more followed a month later and three more 13 months after that. 48 was named Carlos S Cuartas. The next engine, 49, which was produced a month later, was delivered with Caprotti 2-CP poppet valve gear. This installation actuated a set of four 110 mm (4.33 in) valves in each cylinder.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 42 |
| Locobase ID | 15431 |
| Railroad | Antioquia |
| Country | Colombia |
| Whyte | 2-8-2 |
| Number in Class | 7 |
| Road Numbers | 42-44, 46-49 |
| Gauge | 3' |
| Number Built | 7 |
| Builder | Baldwin |
| Year | 1927 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 11 / 3.35 |
| Engine Wheelbase (ft / m) | 25 / 7.62 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.44 |
| Overall Wheelbase (engine & tender) (ft / m) | 47.87 / 14.59 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 79,000 / 35,834 |
| Engine Weight (lbs / kg) | 102,000 / 46,266 |
| Tender Loaded Weight (lbs / kg) | 56,000 / 25,401 |
| Total Engine and Tender Weight (lbs / kg) | 158,000 / 71,667 |
| Tender Water Capacity (gals / ML) | 2800 / 10.61 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5 / 5 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 33 / 16.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 40 / 1016 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Tractive Effort (lbs / kg) | 19,584 / 8883.16 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.03 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 96 - 2" / 51 |
| Flues (number - dia) (in / mm) | 16 - 5.375" / 137 |
| Flue/Tube length (ft / m) | 13.75 / 4.19 |
| Firebox Area (sq ft / m2) | 114 / 10.59 |
| Grate Area (sq ft / m2) | 31.87 / 2.96 |
| Evaporative Heating Surface (sq ft / m2) | 1109 / 103.03 |
| Superheating Surface (sq ft / m2) | 260 / 24.15 |
| Combined Heating Surface (sq ft / m2) | 1369 / 127.18 |
| Evaporative Heating Surface/Cylinder Volume | 238.28 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5737 |
| Same as above plus superheater percentage | 6827 |
| Same as above but substitute firebox area for grate area | 24,419 |
| Power L1 | 10,362 |
| Power MT | 1156.67 |