Data from DeGolyer, Volume 66, pp. 376. See also W L Schurz, Bolivia: A Commercial and Industrial Handbook, Special Agents Series, Issue 208 (Washington, DC: Government Printing Office, 1921), p. 60. Works number was 51870 in June 1919.
This tank engine was headed for the Tarera-Corocoro branch of the ALP, which ran for only 8 km (5 miles).
The rectangular side tanks were to "taper to front end to allow engineer to see track." As was true on most rural railways, the main lines had relatively tight curves, bending to radii as tight as 80 metres (262 feet). Sidings and switchers had curve radii half as generous (40 metres/131 feet).
Some time after its service entry, the 1 was taken into the Empresa Nacional de Ferrocarriles Boliviano and renumbered 104.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 1 |
| Locobase ID | 15187 |
| Railroad | Arica-La Paz |
| Country | Bolivia |
| Whyte | 2-6-2T |
| Number in Class | 1 |
| Road Numbers | 1 |
| Gauge | Metre |
| Number Built | 1 |
| Builder | Baldwin |
| Year | 1919 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 10 / 3.05 |
| Engine Wheelbase (ft / m) | 24.50 / 7.47 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.41 |
| Overall Wheelbase (engine & tender) (ft / m) | 24.50 / 7.47 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 80,000 / 36,287 |
| Engine Weight (lbs / kg) | 107,000 / 48,534 |
| Tender Loaded Weight (lbs / kg) | |
| Total Engine and Tender Weight (lbs / kg) | |
| Tender Water Capacity (gals / ML) | 1600 / 6.06 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 44 / 22 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 44 / 1118 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 16" x 20" / 406x508 |
| Tractive Effort (lbs / kg) | 17,309 / 7851.24 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.62 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 139 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 10.50 / 3.20 |
| Firebox Area (sq ft / m2) | 84 / 7.80 |
| Grate Area (sq ft / m2) | 14.50 / 1.35 |
| Evaporative Heating Surface (sq ft / m2) | 842 / 78.22 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 842 / 78.22 |
| Evaporative Heating Surface/Cylinder Volume | 180.91 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 2538 |
| Same as above plus superheater percentage | 2538 |
| Same as above but substitute firebox area for grate area | 14,700 |
| Power L1 | 3480 |
| Power MT | 287.70 |