Data from "Side Tank Locomotives-Metre Gauge-Type 2-8-4-Drawing No 2/R944" locomotive diagram from "Antofagasta (Chili) & Bolivia Rwy, Co, Ltd. History from [] (accessed 10 April 2005). Although built by North British (works numbers were 23562-23581), this class was designed by engineers Hilary Hood and Eduardo Gerrard at Antofagasta's Mejillones shop.
After serving the FCAB for 35 years, most of the class were scrapped. Engine 34 survived and restoration began in 2001 with first steam in March 2004 in a brand new boiler. There was talk at the time of fitting the driving axles with roller bearings.
Principal Dimensions by Steve Llanso of Middle Run Media | |
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Class | 33 |
Locobase ID | 6480 |
Railroad | Antofagasta (Chile ) & Bolivia (FCAB) |
Country | Chile |
Whyte | 2-8-4T |
Number in Class | 20 |
Road Numbers | 33-52 |
Gauge | Metre |
Number Built | 20 |
Builder | North British |
Year | 1927 |
Valve Gear | Walschaert |
Locomotive Length and Weight | |
Driver Wheelbase (ft / m) | 11.75 / 3.58 |
Engine Wheelbase (ft / m) | 31 / 9.45 |
Ratio of driving wheelbase to overall engine wheelbase | 0.38 |
Overall Wheelbase (engine & tender) (ft / m) | 31 / 9.45 |
Axle Loading (Maximum Weight per Axle) (lbs / kg) | 33,600 / 15,241 |
Weight on Drivers (lbs / kg) | 150,976 / 68,482 |
Engine Weight (lbs / kg) | 202,944 / 92,054 |
Tender Loaded Weight (lbs / kg) | |
Total Engine and Tender Weight (lbs / kg) | |
Tender Water Capacity (gals / ML) | 3035 / 11.50 |
Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 1775 / 6718.40 |
Minimum weight of rail (calculated) (lb/yd / kg/m) | 63 / 31.50 |
Geometry Relating to Tractive Effort | |
Driver Diameter (in / mm) | 44 / 1118 |
Boiler Pressure (psi / kPa) | 184.20 / 1270 |
High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 24" / 483x610 |
Tractive Effort (lbs / kg) | 30,830 / 13984.27 |
Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.90 |
Heating Ability | |
Tubes (number - dia) (in / mm) | 156 - 1.875" / 48 |
Flues (number - dia) (in / mm) | 22 - 5.25" / 133 |
Flue/Tube length (ft / m) | 15 / 4.57 |
Firebox Area (sq ft / m2) | 101 / 9.38 |
Grate Area (sq ft / m2) | 29.60 / 2.75 |
Evaporative Heating Surface (sq ft / m2) | 1716 / 159.42 |
Superheating Surface (sq ft / m2) | 371 / 34.47 |
Combined Heating Surface (sq ft / m2) | 2087 / 193.89 |
Evaporative Heating Surface/Cylinder Volume | 217.88 |
Computations Relating to Power Output (More Information) | |
Robert LeMassena's Power Computation | 5452 |
Same as above plus superheater percentage | 6434 |
Same as above but substitute firebox area for grate area | 21,953 |
Power L1 | 9536 |
Power MT | 557.00 |