Buenos Aires Pacific 2-8-2 Locomotives in Argentina
Class Details by Steve Llanso of Sweat House Media
Class unknown (Locobase 2855)
Data from 1946 Beyer, Peacock catalogue hosted on Martyn Bane's website at [
] (accessed 21 May 2006); and "Bengal Nagpur Railway - De Glehn Compound (4-6-2) Type Locomotive", Melesco Superheater Company, Ltd Brochure, p. seven [sic]. Builders numbers were 6535-6542 in 1928.
Powerful Mikes for the BAP.These were among the very few non-North American designs to match size and power with those of the US and Canada. Note the relatively tall drivers, which reflected a Continental willingness to see 2-8-2s as mixed-traffic engines.. Photos show how big the boiler barrel was by comparison.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 2855 |
| Railroad | Buenos Aires Pacific (BAP) |
| Country | Argentina |
| Whyte | 2-8-2 |
| Number in Class | 8 |
| Road Numbers | 3001-3008 |
| Gauge | 5'6" |
| Number Built | 8 |
| Builder | Beyer, Peacock |
| Year | 1928 |
| Valve Gear | Walschaert |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 18.25 / 5.56 |
| Engine Wheelbase (ft / m) | 36.92 / 11.25 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.49 |
| Overall Wheelbase (engine & tender) (ft / m) | 67.83 / 20.67 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | 48,501 / 22,000 |
| Weight on Drivers (lbs / kg) | 193,874 / 87,940 |
| Engine Weight (lbs / kg) | 265,877 / 120,600 |
| Tender Loaded Weight (lbs / kg) | 193,312 / 87,685 |
| Total Engine and Tender Weight (lbs / kg) | 459,189 / 208,285 |
| Tender Water Capacity (gals / ML) | 7700 / 29.17 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 15 / 13.60 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 81 / 40.50 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 67 / 1702 |
| Boiler Pressure (psi / kPa) | 200 / 1380 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 24.5" x 30" / 622x762 |
| Tractive Effort (lbs / kg) | 45,691 / 20725.11 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.24 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 148 - 2.25" / 57 |
| Flues (number - dia) (in / mm) | 36 - 5.5" / 140 |
| Flue/Tube length (ft / m) | 18 / 5.49 |
| Firebox Area (sq ft / m2) | 260 / 24.15 |
| Grate Area (sq ft / m2) | 46 / 4.27 |
| Evaporative Heating Surface (sq ft / m2) | 2760 / 256.41 |
| Superheating Surface (sq ft / m2) | 676 / 62.80 |
| Combined Heating Surface (sq ft / m2) | 3436 / 319.21 |
| Evaporative Heating Surface/Cylinder Volume | 168.61 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 9200 |
| Same as above plus superheater percentage | 11,040 |
| Same as above but substitute firebox area for grate area | 62,400 |
| Power L1 | 13,840 |
| Power MT | 629.52 |