Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 54, p. 368.
Although it repeated most of the details of the earlier Lautaro tank shown in Locobase 12381, the 17 arrived with small changes in the firebox and a three-ton gain in weight. It tackled the 4% grades and curves of 100 metre (328 foot) radii.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 66, p. 380. Works number was 51268 in February 1919.
Two years after the Lautaro took delivery of the 17 (Locobase 14518), the nitrate railway ordered another radial tank that had the same boiler and firebox, but significantly greater cylinder volume.
Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 21, p 296. See also Jose ntonio Gonzalez-Pizarro, "Privatization Versus Public Funding on the Atacama Desert Railway v An Interpretation", archived at [],%20Signalling%20and%20Security%20in%20Railway/Chapter%203%20%20Privatization%20Versus%20Public%20Funding%20on%20the%20Atacama%20Desert%20Railway-An%20Interpretation.pdf. Works number was 17341 in January 1900.
Principal Dimensions by Steve Llanso of Middle Run Media | |||
---|---|---|---|
Class | 17 | 20 | Lautaro |
Locobase ID | 14518 | 15189 | 12381 |
Railroad | Lautaro Nitrate | Lautaro Nitrate | Lautaro Nitrate |
Country | Chile | Chile | Chile |
Whyte | 0-6-2T | 0-6-2T | 0-6-2T |
Number in Class | 1 | 1 | 1 |
Road Numbers | 17 | 20 | 7, 19 |
Gauge | 3'6" | 3'6" | 3'6" |
Number Built | 1 | 1 | 1 |
Builder | Baldwin | Baldwin | Burnham, Williams & Co |
Year | 1917 | 1918 | 1900 |
Valve Gear | Stephenson | Stephenson | Stephenson |
Locomotive Length and Weight | |||
Driver Wheelbase (ft / m) | 9.25 / 2.82 | 9.25 / 2.82 | 9.25 / 2.82 |
Engine Wheelbase (ft / m) | 15.25 / 4.65 | 15.25 / 4.65 | 15.25 / 4.65 |
Ratio of driving wheelbase to overall engine wheelbase | 0.61 | 0.61 | 0.61 |
Overall Wheelbase (engine & tender) (ft / m) | 15.25 / 4.65 | 15.25 / 4.65 | 15.25 / 4.65 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | |||
Weight on Drivers (lbs / kg) | 62,000 / 28,123 | 62,000 / 28,123 | 56,000 / 25,401 |
Engine Weight (lbs / kg) | 70,000 / 31,752 | 70,000 / 31,752 | 67,000 / 30,391 |
Tender Loaded Weight (lbs / kg) | |||
Total Engine and Tender Weight (lbs / kg) | |||
Tender Water Capacity (gals / ML) | 1200 / 4.55 | 1200 / 4.55 | 1000 / 3.79 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1.25 | ||
Minimum weight of rail (calculated) (lb/yd / kg/m) | 34 / 17 | 34 / 17 | 31 / 15.50 |
Geometry Relating to Tractive Effort | |||
Driver Diameter (in / mm) | 37 / 940 | 37 / 940 | 37 / 940 |
Boiler Pressure (psi / kPa) | 160 / 1100 | 160 / 1100 | 160 / 1100 |
High Pressure Cylinders (dia x stroke) (in / mm) | 11" x 16" / 279x406 | 13" x 20" / 279x406 | 13" x 20" / 330x508 |
Tractive Effort (lbs / kg) | 7116 / 3227.77 | 12,424 / 5635.44 | 12,424 / 5635.44 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 8.71 | 4.99 | 4.51 |
Heating Ability | |||
Tubes (number - dia) (in / mm) | 124 - 1.75" / 44 | 124 - 1.75" / 44 | 124 - 1.75" / 44 |
Flues (number - dia) (in / mm) | |||
Flue/Tube length (ft / m) | 10 / 3.05 | 10 / 3.05 | 10 / 3.05 |
Firebox Area (sq ft / m2) | 58.20 / 5.41 | 58.20 / 5.41 | 58.11 / 5.40 |
Grate Area (sq ft / m2) | 11.30 / 1.05 | 11.30 / 1.05 | 11.16 / 1.04 |
Evaporative Heating Surface (sq ft / m2) | 627 / 58.25 | 627 / 58.25 | 626 / 58.18 |
Superheating Surface (sq ft / m2) | |||
Combined Heating Surface (sq ft / m2) | 627 / 58.25 | 627 / 58.25 | 626 / 58.18 |
Evaporative Heating Surface/Cylinder Volume | 356.28 | 204.07 | 203.74 |
Computations Relating to Power Output (More Information) | |||
Robert LeMassena's Power Computation | 1808 | 1808 | 1786 |
Same as above plus superheater percentage | 1808 | 1808 | 1786 |
Same as above but substitute firebox area for grate area | 9312 | 9312 | 9298 |
Power L1 | 5147 | 2948 | 2943 |
Power MT | 549.06 | 314.48 | 347.58 |