Data from Charles King, "The Chilian [sic] State Railways," The Railway Magazine (March 1908), pp. 209-214; see also the introductory article in the same journal at February 1908, pp.143-150; and Martin Coombs, "2-6-0 d/w ?, cyls. ?, built by Borsig in 1906-7 for the Sindicato de Obras P blicas.", Chilean steam locomotives lists, Part 3 Metre-Gauge locos (October 2020), pP. 165-166 -available at [], last accessed 25 April 2021. Works numbers were 6010 and 6289.
Martin Coombs explained that several private contractors in Chile formed a syndicate to bid on state construction projects. The SOP succeeded in contracting several parts of the the Ferrocarril Arica - La Paz (FCALP), 18 km of the broad-gauge Rucapehen a Tome line and a similar branch line connecting Pua to Curacautin. However, Coombs noted, the SOP's contracts were suspended in late 1907 for lack of progress on their projects.
A particular requirement for this Mogul design was the ability to negotiate 3-chain (198-ft) curves. One way in which this was accomplished was having the connecting (main) rod drive on the last of the three coupled axles. Steam-raising capability wasn't sacrificed, however, as the small drivers allowed a relatively large firebox to ride above the axles without setting up a high center of gravity. According to King, the resulting engine "...proved to be, for its size, exceedingly powerful and smooth in running." Its principal bailiwicks were the Talca-Constitucion branch and short lines leaving Chanaral.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 3 |
| Locobase ID | 10753 |
| Railroad | El Sindicato de Obras P blicas |
| Country | Chile |
| Whyte | 2-6-0 |
| Number in Class | 2 |
| Road Numbers | 3-4 |
| Gauge | Metre |
| Number Built | 2 |
| Builder | Borsig |
| Year | 1906 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 7.87 / 2.40 |
| Engine Wheelbase (ft / m) | 13.94 / 4.25 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.56 |
| Overall Wheelbase (engine & tender) (ft / m) | |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 17,919 / 8128 |
| Weight on Drivers (lbs / kg) | |
| Engine Weight (lbs / kg) | 62,159 / 28,195 |
| Tender Loaded Weight (lbs / kg) | 35,274 / 16,000 |
| Total Engine and Tender Weight (lbs / kg) | 97,433 / 44,195 |
| Tender Water Capacity (gals / ML) | 1584 / 6 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 2.20 / 2 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 43.30 / 1100 |
| Boiler Pressure (psi / kPa) | 169.70 / 1170 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 14.17" x 21.65" / 360x550 |
| Tractive Effort (lbs / kg) | 14,481 / 6568.48 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | |
| Firebox Area (sq ft / m2) | |
| Grate Area (sq ft / m2) | 14.53 / 1.35 |
| Evaporative Heating Surface (sq ft / m2) | 820 / 76.20 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 820 / 76.20 |
| Evaporative Heating Surface/Cylinder Volume | 207.51 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2466 |
| Same as above plus superheater percentage | 2466 |
| Same as above but substitute firebox area for grate area | |
| Power L1 | |
| Power MT | |