Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 44, p. 198. Works numbers were 39067-39069 in January 1913.
Nineteen years after the ASN had bought its double-ender saddle tanks from Baldwin through broker Balfour Williamson, it took delivery of three more that were essentially identical except for having a higher boiler pressure and slightly greater weights.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Vol 17, p. 181 and Vol 19, p. 91. Works numbers were 12398-12399 in January 1892,13995-13996 in April 1894, 14111-14115 in October, and 14236-14238 in March 1895.
This British-owned railway didn't balk at buying a pair of double-ender tanks for this key railway in Chile's northern province of Tarapaca, then repeating the orders over the next 3 years. Local dealer Balfour, Williamson bought 5 more originally ordered by Hemenway, Browne. These too went to the ASN as did 3 more in 1895.
Principal Dimensions by Steve Llanso of Middle Run Media | ||
---|---|---|
Class | 21 | unknown |
Locobase ID | 13996 | 12013 |
Railroad | Agua Santa Nitrate & Railroad | Agua Santa Nitrate & Railroad |
Country | Chile | Chile |
Whyte | 2-4-2ST | 2-4-2ST |
Number in Class | 3 | 12 |
Road Numbers | 21-23 | |
Gauge | 2'6" | 2'6" |
Number Built | 3 | 12 |
Builder | Baldwin | Burnham, Williams & Co |
Year | 1913 | 1892 |
Valve Gear | Stephenson | Stephenson |
Locomotive Length and Weight | ||
Driver Wheelbase (ft / m) | 5 / 1.52 | 5 / 1.52 |
Engine Wheelbase (ft / m) | 18.17 / 5.54 | 18.17 / 5.54 |
Ratio of driving wheelbase to overall engine wheelbase | 0.28 | 0.28 |
Overall Wheelbase (engine & tender) (ft / m) | 18.17 / 5.54 | 18.17 / 5.54 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
Weight on Drivers (lbs / kg) | 31,000 / 14,061 | 30,000 / 13,608 |
Engine Weight (lbs / kg) | 47,000 / 21,319 | 43,000 / 19,504 |
Tender Loaded Weight (lbs / kg) | ||
Total Engine and Tender Weight (lbs / kg) | 47,000 / 21,319 | 43,000 / 19,504 |
Tender Water Capacity (gals / ML) | 500 / 1.89 | 500 / 5.68 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 150 / 568 | |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 26 / 13 | 25 / 12.50 |
Geometry Relating to Tractive Effort | ||
Driver Diameter (in / mm) | 37 / 940 | 37 / 940 |
Boiler Pressure (psi / kPa) | 150 / 1030 | 130 / 900 |
High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 | 11" x 16" / 279x406 |
Tractive Effort (lbs / kg) | 6671 / 3025.92 | 5782 / 2622.67 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.65 | 5.19 |
Heating Ability | ||
Tubes (number - dia) (in / mm) | 96 - 1.5" / 38 | 96 - 1.5" / 38 |
Flues (number - dia) (in / mm) | ||
Flue/Tube length (ft / m) | 9 / 2.74 | 9 / 2.74 |
Firebox Area (sq ft / m2) | 39 / 3.62 | 38 / 3.53 |
Grate Area (sq ft / m2) | 8.70 / 0.81 | 8.70 / 0.81 |
Evaporative Heating Surface (sq ft / m2) | 375 / 34.85 | 377 / 35.04 |
Superheating Surface (sq ft / m2) | ||
Combined Heating Surface (sq ft / m2) | 375 / 34.85 | 377 / 35.04 |
Evaporative Heating Surface/Cylinder Volume | 213.08 | 214.22 |
Computations Relating to Power Output (More Information) | ||
Robert LeMassena's Power Computation | 1305 | 1131 |
Same as above plus superheater percentage | 1305 | 1131 |
Same as above but substitute firebox area for grate area | 5850 | 4940 |
Power L1 | 2996 | 2583 |
Power MT | 426.13 | 379.64 |