Buenos Aires Pacific 4-6-0 Locomotives in Argentina
Class Details by Steve Llanso of Sweat House Media
Class 121-126 (Locobase 3664)
Data provided by Carlos Alberto Fern+ndez Priotti in Bryan Attewell ([
] Steam Locomotive simulator program (April 2000).
Class 81-86 (Locobase 3665)
Data provided by Carlos Alberto Fern+ndez Priotti in Bryan Attewell ([] Steam Locomotive simulator program (April 2000).
The BAP operated 1,166 miles of track and was counted as one of the Big Four in Argentina.
| Principal Dimensions by Steve Llanso of Middle Run Media | ||
|---|---|---|
| Class | 121-126 | 81-86 |
| Locobase ID | 3664 | 3665 |
| Railroad | Buenos Aires Pacific (BAP) | Buenos Aires Pacific (BAP) |
| Country | Argentina | Argentina |
| Whyte | 4-6-0 | 4-6-0 |
| Number in Class | 6 | 6 |
| Road Numbers | 121-126 | 81-86 |
| Gauge | 5'6" | 5'6" |
| Number Built | 6 | 6 |
| Builder | North British | Dubs & Co |
| Year | 1903 | 1902 |
| Valve Gear | ||
| Locomotive Length and Weight | ||
| Driver Wheelbase (ft / m) | ||
| Engine Wheelbase (ft / m) | ||
| Ratio of driving wheelbase to overall engine wheelbase | ||
| Overall Wheelbase (engine & tender) (ft / m) | ||
| Axle Loading (Maximum Weight per Axle) (lbs / kg) | ||
| Weight on Drivers (lbs / kg) | 112,560 / 51,056 | 86,016 / 39,016 |
| Engine Weight (lbs / kg) | ||
| Tender Loaded Weight (lbs / kg) | ||
| Total Engine and Tender Weight (lbs / kg) | ||
| Tender Water Capacity (gals / ML) | 3300 / 12.50 | 4095 / 15.51 |
| Tender Fuel Capacity (oil/coal) (gals/tons / Liters/MT) | 5.60 / 5 | 7 / 6 |
| Minimum weight of rail (calculated) (lb/yd / kg/m) | 63 / 31.50 | 48 / 24 |
| Geometry Relating to Tractive Effort | ||
| Driver Diameter (in / mm) | 67 / 1702 | 67 / 1702 |
| Boiler Pressure (psi / kPa) | 178.40 / 1230 | 179.80 / 1240 |
| High Pressure Cylinders (dia x stroke) (in / mm) | 21" x 26" / 533x660 | 18" x 26" / 457x660 |
| Tractive Effort (lbs / kg) | 25,951 / 11771.19 | 19,216 / 8716.24 |
| Factor of Adhesion (Weight on Drivers/Tractive Effort) | 4.34 | 4.48 |
| Heating Ability | ||
| Tubes (number - dia) (in / mm) | ||
| Flues (number - dia) (in / mm) | ||
| Flue/Tube length (ft / m) | 13 / 3.96 | 12.42 / 3.79 |
| Firebox Area (sq ft / m2) | ||
| Grate Area (sq ft / m2) | 30 / 2.79 | 24 / 2.23 |
| Evaporative Heating Surface (sq ft / m2) | 2215 / 205.86 | 1364 / 126.77 |
| Superheating Surface (sq ft / m2) | ||
| Combined Heating Surface (sq ft / m2) | 2215 / 205.86 | 1364 / 126.77 |
| Evaporative Heating Surface/Cylinder Volume | 212.51 | 178.12 |
| Computations Relating to Power Output (More Information) | ||
| Robert LeMassena's Power Computation | 5352 | 4315 |
| Same as above plus superheater percentage | 5352 | 4315 |
| Same as above but substitute firebox area for grate area | ||
| Power L1 | ||
| Power MT | ||