Data from A R Bennett, "Locomotives for South America", The Locomotive, Volume 16 (15 September 1910), p. 195. See also "Atlantic Type Locomotive for the Buenos Aires & Pacific Railway", Railway Age, Volume XLIII [43], No 8 (22 February 1907), p. 242.
This class bulked about as large as any Atlantic design outside of Europe or North America. Its Belpaire firebox also offered a good deal of direct heating surface area, although its grate offered more modest dimensions. The layout included outside cylinders driving directly onto the rear axle, but inside valves and motion.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | unknown |
| Locobase ID | 16025 |
| Railroad | FC Buenos Ayres & Pacific |
| Country | Argentina |
| Whyte | 4-4-2 |
| Number in Class | 14 |
| Road Numbers | |
| Gauge | 5'6" |
| Number Built | 14 |
| Builder | North British |
| Year | 1905 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | |
| Engine Wheelbase (ft / m) | 26.92 / 8.21 |
| Ratio of driving wheelbase to overall engine wheelbase | |
| Overall Wheelbase (engine & tender) (ft / m) | 52.04 / 15.86 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 85,904 / 38,965 |
| Engine Weight (lbs / kg) | 167,776 / 76,102 |
| Tender Loaded Weight (lbs / kg) | 103,040 / 46,738 |
| Total Engine and Tender Weight (lbs / kg) | 270,816 / 122,840 |
| Tender Water Capacity (gals / ML) | 4920 / 18.64 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 7 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 72 / 36 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 80.50 / 2045 |
| Boiler Pressure (psi / kPa) | 175 / 1210 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19.5" x 26" / 495x660 |
| Tractive Effort (lbs / kg) | 18,269 / 8286.69 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.70 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 292 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 13 / 3.96 |
| Firebox Area (sq ft / m2) | 170 / 15.79 |
| Grate Area (sq ft / m2) | 30 / 2.79 |
| Evaporative Heating Surface (sq ft / m2) | 2164 / 201.04 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2164 / 201.04 |
| Evaporative Heating Surface/Cylinder Volume | 240.79 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5250 |
| Same as above plus superheater percentage | 5250 |
| Same as above but substitute firebox area for grate area | 29,750 |
| Power L1 | 7874 |
| Power MT | 404.15 |