Data from Baldwin Locomotive Works Specification for Engines digitized by the DeGolyer Library of Southern Methodist University Vol 24, pp. 236-237. Works numbers were 19437-19440 in August 1901.
Polapi, Adelante, Exito, and Reserva were the names of this next quartet of Moguls sold to the H de B. They followed the slightly larger 2-6-0s shown in Locobase 11568 and continued the trend toward wholesome nouns for names. (Well, Polapi was a volcano, but Adelante, Exito, and Reserva translate as Forward!, Success!, and ...uh ...Reserve!).
This small Consolidation design had a long boiler for its wheelbase, the tubes measuring 4 feet longer than the adhesion spread. More of the design would follow in 1906, but would weigh about 2 tons less; see Locobase 12594.
Data from Baldwin Locomotive Works Specification for Engines digitized by the DeGolyer Library of Southern Methodist University, Volume 19, pp. 236-237. Works numbers were 14461-14465 in September 1895, 17461-17462 in February 1900, 18388-18391 in November.
As delivered, the 1895 Consolidations were named Vulcano, Venus, Apalo, Minerva, and Jupiter. Later batches followed from Baldwin in 1900-1901. The two in February 1900 had local names: Oraro, Francisco Argandona. Names for the November and August 1901 batches were more hortatory: Victoria, Union, Fuerza, Trabajo. Four more slightly smaller engines were delivered in 1901; see Locobase 12521.
The Huanchaca joined the Antofagasta (Chile ) & Bolivia (FCAB) in 1908, at which point the class was renumbered. 93-94, 43-44, 95, 99-108
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | Polapi | Vulcano |
Locobase ID | 12521 | 12150 |
Railroad | Huanchaca de Bolivia | Huanchaca de Bolivia |
Country | Chile | Chile |
Whyte | 2-8-0 | 2-8-0 |
Number in Class | 4 | 11 |
Road Numbers | 71-74 / 105-108 | 59-65, 67-70 |
Gauge | 2'6" | 2'6" |
Number Built | 4 | 11 |
Builder | Burnham, Williams & Co | Burnham, Williams & Co |
Year | 1901 | 1895 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 10.58 / 3.22 | 9.83 / 3 |
Engine Wheelbase (ft / m) | 18 / 5.49 | 18 / 5.49 |
Ratio of driving wheelbase to overall engine wheelbase | 0.59 | 0.55 |
Overall Wheelbase (engine & tender) (ft / m) | ||
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 76,000 / 34,473 | 75,000 |
Engine Weight (lbs / kg) | 89,000 / 40,370 | 89,000 |
Tender Loaded Weight (lbs / kg) | 53,000 / 24,040 | 47,500 / 21,546 |
Total Engine and Tender Weight (lbs / kg) | 142,000 / 64,410 | 136,500 / 21,546 |
Tender Water Capacity (gals / ML) | 2400 / 9.09 | 2400 / 9.09 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | ||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 32 / 16 | 31 / 15.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 37.50 / 953 | 37.50 / 953 |
Boiler Pressure (psi / kPa) | 160 / 1100 | 150 / 1030 |
High Pressure Cylinders (dia x stroke) (in / mm) | 15" x 20" / 381x508 | 15" x 20" / 381x508 |
Tractive Effort (lbs / kg) | 16,320 / 7402.64 | 15,300 / 6939.97 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.66 | 4.90 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 123 - 2.25" / 57 | 126 - 2.25" / 57 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 14.59 / 4.45 | 14.58 / 4.44 |
Firebox Area (sq ft / m2) | 76 / 7.06 | 76.40 / 7.10 |
Grate Area (sq ft / m2) | 13 / 1.21 | 13.70 / 1.27 |
Evaporative Heating Surface (sq ft / m2) | 1125 / 104.55 | 1148 / 106.69 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 1125 / 104.55 | 1148 / 106.69 |
Evaporative Heating Surface/Cylinder Volume | 275.02 | 280.64 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 2080 | 2055 |
Same as above plus superheater percentage | 2080 | 2055 |
Same as above but substitute firebox area for grate area | 12,160 | 11,460 |
Power L1 | 3679 | 3507 |
Power MT | 426.88 | 412.35 |