Data from "Narrow-Gauge Locomotive for the Cauca Railway", American Engineer & Car Builder (December 1898), p. 398 and from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University. Works number was 16234 in September 1898.
Somewhat surprisingly, this little locomotive trailed a tender. According to the report, the Cauca had 200-ft radius curves and 30-40 lb/yard and no turntables. After studying the Forney tank design, Baldwin concluded that only with a separate tender could the engine carry enough water and fuel (1 cord of wood). The builder put a pony truck just behind the closely spaced drivers and swung the tender from a pivot over the pony truck axle.
The arrangement allowed bi-directional running with a low likelihood of derailing. Other features were a large cabbage stack (to capture the plentitude of sparks associated with a wood fire), steam dome shaped like the Capitol, and large cab.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 7 |
| Locobase ID | 10873 |
| Railroad | FC del Cauca |
| Country | Colombia |
| Whyte | 0-6-2 |
| Number in Class | 1 |
| Road Numbers | 7 |
| Gauge | 3' |
| Number Built | 1 |
| Builder | Burnham, Williams & Co |
| Year | 1898 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 6.25 / 1.90 |
| Engine Wheelbase (ft / m) | 11.17 / 3.40 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | 22.58 / 6.88 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 42,000 / 19,051 |
| Engine Weight (lbs / kg) | 48,000 / 21,772 |
| Tender Loaded Weight (lbs / kg) | 17,000 / 7711 |
| Total Engine and Tender Weight (lbs / kg) | 65,000 / 29,483 |
| Tender Water Capacity (gals / ML) | 1000 / 3.79 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 23 / 11.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 33 / 838 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 12" x 16" / 305x406 |
| Tractive Effort (lbs / kg) | 9495 / 4306.86 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.42 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 112 - 1.75" / 44 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 9.50 / 2.90 |
| Firebox Area (sq ft / m2) | 45 / 4.18 |
| Grate Area (sq ft / m2) | 9 / 0.84 |
| Evaporative Heating Surface (sq ft / m2) | 552 / 51.30 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 552 / 51.30 |
| Evaporative Heating Surface/Cylinder Volume | 263.56 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 1440 |
| Same as above plus superheater percentage | 1440 |
| Same as above but substitute firebox area for grate area | 7200 |
| Power L1 | 3265 |
| Power MT | 514.15 |