Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 66, pp. 138. Works numbers were 56328 in March 1923 and 60084 in June 1927.
Little oil-burning Prairies bought on behalf of the Troco, which by that time had been taken over by the International Petroleum Company. The railway offered challenges in the form of 80-metre curve radii (262 feet) or 22 degrees on the main line and 50 metre radii (164 feet) or 35 1/2 degrees in the yards. Grades inclined as much as 4%. Rail weight was a slender 45 lb/yard (22.5 kg/metre).
The 5 was sold to Santander and was renumbered 2. Still bearing that number, the 2 later operated for the Cucuta.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 78, p. 180. See Locobase 15075 for a brief description of the "Troco". Works number was 58844 in November 1925.
Essentially identical to the 1904 tank supplied to United Fruit's 3-foot gauge line in Guatemala (Locobase 12725), this locomotive generated more tractive effort through higher boiler pressure, had a slightly larger grate thanks to the wider gauge, and acutated its valves with outside constant-lead radial valve gear.
After a long career, the 4 was preserved at Trocha.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 2 | 4 |
Locobase ID | 15075 | 15377 |
Railroad | Tropical Oil Company | Tropical Oil Company |
Country | Colombia | Colombia |
Whyte | 2-6-2 | 2-6-2T |
Number in Class | 2 | 1 |
Road Numbers | 2, 5 | 4 |
Gauge | Metre | Metre |
Number Built | 2 | 1 |
Builder | Baldwin | Baldwin |
Year | 1923 | 1925 |
Valve Gear | Stephenson | Walschaert |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 9 / 2.74 | 7.50 / 2.29 |
Engine Wheelbase (ft / m) | 23.83 / 7.26 | 20.75 / 6.32 |
Ratio of driving wheelbase to overall engine wheelbase | 0.38 | 0.36 |
Overall Wheelbase (engine & tender) (ft / m) | 44.29 / 13.50 | 20.75 / 6.32 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 64,000 / 29,030 | 39,000 / 17,690 |
Engine Weight (lbs / kg) | 84,000 / 38,102 | 57,000 / 25,855 |
Tender Loaded Weight (lbs / kg) | 49,000 / 22,226 | |
Total Engine and Tender Weight (lbs / kg) | 133,000 / 60,328 | 57,000 / 25,855 |
Tender Water Capacity (gals / ML) | 2200 / 8.33 | 1000 / 3.79 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 900 / 3407 | 400 / 1514 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 36 / 18 | 22 / 11 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 40 / 1016 | 33 / 838 |
Boiler Pressure (psi / kPa) | 190 / 1310 | 180 / 1240 |
High Pressure Cylinders (dia x stroke) (in / mm) | 14" x 20" / 356x508 | 10" x 16" / 254x406 |
Tractive Effort (lbs / kg) | 15,827 / 7179.01 | 7418 / 3364.75 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.04 | 5.26 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 145 - 2" / 51 | 70 - 1.75" / 44 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 13.50 / 4.11 | 10.08 / 3.07 |
Firebox Area (sq ft / m2) | 74 / 6.88 | 42 / 3.90 |
Grate Area (sq ft / m2) | 18.40 / 1.71 | 8.70 / 0.81 |
Evaporative Heating Surface (sq ft / m2) | 1093 / 101.58 | 363 / 33.74 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 1093 / 101.58 | 363 / 33.74 |
Evaporative Heating Surface/Cylinder Volume | 306.73 | 249.58 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 3496 | 1566 |
Same as above plus superheater percentage | 3496 | 1566 |
Same as above but substitute firebox area for grate area | 14,060 | 7560 |
Power L1 | 5200 | 3900 |
Power MT | 537.38 | 661.39 |