Data from Baldwin Locomotive Works Specification for Engines as digitized by the DeGolyer Library of Southern Methodist University Volume 29, p. 213. Works numbers were 29370-29374, 29416-29419, 29448, 29572-29573 29612, 29613-29614 in November 1906; 29675-29679 in December.
The British-built AGW (soon to be renamed Buenos Aires & Pacific Railway in 1907) was laid out along generous lines. According to Baldwin's specs, the sharpest curves had 1,090 ft (332 metres - less than 3 1/2 degrees) on the main line and 535 ft (163 metres) on the sidings.
| Principal Dimensions by Steve Llanso of Middle Run Media | |
|---|---|
| Class | 181 |
| Locobase ID | 13019 |
| Railroad | Argentine Great Western (BAP) |
| Country | Argentina |
| Whyte | 2-8-0 |
| Number in Class | 20 |
| Road Numbers | 181-280 |
| Gauge | 5'6" |
| Number Built | 20 |
| Builder | Burnham, Williams & Co |
| Year | 1906 |
| Valve Gear | Stephenson |
| Locomotive Length and Weight | |
| Driver Wheelbase (ft / m) | 16.75 / 5.11 |
| Engine Wheelbase (ft / m) | 25 / 7.62 |
| Ratio of driving wheelbase to overall engine wheelbase | 0.67 |
| Overall Wheelbase (engine & tender) (ft / m) | 53.62 / 16.34 |
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | |
| Weight on Drivers (lbs / kg) | 125,000 / 56,699 |
| Engine Weight (lbs / kg) | 140,000 / 63,503 |
| Tender Loaded Weight (lbs / kg) | 100,000 / 45,359 |
| Total Engine and Tender Weight (lbs / kg) | 240,000 / 108,862 |
| Tender Water Capacity (gals / ML) | 5000 / 18.94 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 52 / 26 |
| Geometry Relating to Tractive Effort | |
| Driver Diameter (in / mm) | 60 / 1524 |
| Boiler Pressure (psi / kPa) | 180 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 19" x 26" / 483x660 |
| Tractive Effort (lbs / kg) | 23,934 / 10856.29 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 5.22 |
| Heating Ability | |
| Tubes (number - dia) (in / mm) | 265 - 2" / 51 |
| Flues (number - dia) (in / mm) | |
| Flue/Tube length (ft / m) | 15.08 / 4.60 |
| Firebox Area (sq ft / m2) | 139 / 12.92 |
| Grate Area (sq ft / m2) | 30 / 2.79 |
| Evaporative Heating Surface (sq ft / m2) | 2213 / 205.67 |
| Superheating Surface (sq ft / m2) | |
| Combined Heating Surface (sq ft / m2) | 2213 / 205.67 |
| Evaporative Heating Surface/Cylinder Volume | 259.37 |
| Computations Relating to Power Output (More Information) | |
| Robert LeMassena's Power Computation | 5400 |
| Same as above plus superheater percentage | 5400 |
| Same as above but substitute firebox area for grate area | 25,020 |
| Power L1 | 6135 |
| Power MT | 432.81 |