Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University, Volume 44, p. 194 and 49, p. 175. Works numbers were 33858 in September 1909 and 40955-40956 in September 1913.
Similar to Moguls already in service on the Chilean State Railways' broad gauge (Locobase 13127), the Laurela and her two younger sisters Quilachanquin and Lebu had smaller boilers. They were purchased by the privately held Carbonifera Rios de Curanilahue, whose Arenca railway offered some challenges: 50-lb/yard (25-kg/metre) rail, 3% grades, and minimum curve radii of 120 metres (394 ft). So the builder was abjured to "give special attention to keeping weight down to limit."
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | Laurela |
| Locobase ID | 13989 |
| Railroad | Arenca |
| Country | Chile |
| Whyte | 2-6-0 |
| Number in Class | 3 |
| Road Numbers | |
| Gauge | 5'6" |
| Number Built | 3 |
| Builder | Baldwin |
| Year | 1909 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 14 / 4.27 |
| Engine Wheelbase (ft / m) | 21.33 / 6.50 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.66 |
| Overall Wheelbase (engine & tender) (ft / m) | 42.23 / 12.87 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 72,800 / 33,022 |
| Engine Weight (lbs / kg) | 82,880 / 37,594 |
| Tender Loaded Weight (lbs / kg) | 60,000 / 27,216 |
| Total Engine and Tender Weight (lbs / kg) | 142,880 / 64,810 |
| Tender Water Capacity (gals / ML) | 3000 / 11.36 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7.80 / 7 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 40 / 20 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 56 / 1422 |
| Boiler Pressure (psi / kPa) | 160 / 1100 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 17" x 24" / 432x610 |
| Tractive Effort (lbs / kg) | 16,845 / 7640.77 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.32 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 169 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 11.10 / 3.38 |
| Firebox Area (sq ft / m2) | 90.10 / 8.37 |
| Grate Area (sq ft / m2) | 16.16 / 1.50 |
| Evaporative Heating Surface (sq ft / m2) | 1065 / 98.94 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 1065 / 98.94 |
| Evaporative Heating Surface/Cylinder Volume | 168.91 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2586 |
| Same as above plus superheater percentage | 2586 |
| Same as above but substitute firebox area for grate area | 14,416 |
| Power L1 | 3589 |
| Power MT | 326.06 |