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Buenos Aires Great Southern class 8A
In 1906, North British built 34 2-6-2T tank locomotives of the class 8A for the Ferrocarril del Sud, or Buenos Aires Great Southern. These locomotives had an oil fired boiler with Belpaire firebox , outside cylinders ...
General
| Property | Buenos Aires Great Southern class 8A as built |
|---|---|
| Built | 1906 |
| Manufacturers | North British |
| Wheel arrangement | 2-6-2T (Prairie) |
| Gauge | 1,676 mm (Indian broad gauge) |
Dimensions and weights
| Property | Buenos Aires Great Southern class 8A as built |
|---|---|
| Wheelbase | 9.20 m |
| Rigid wheelbase | 4.27 m |
| Service weight | 74.1 t |
| Adhesive weight | 49.7 t |
| Axle load | 16.8 t |
| Water capacity | 5,455 l |
| Fuel capacity | 2,389 l (oil) |
Boiler
| Property | Buenos Aires Great Southern class 8A as built |
|---|---|
| Grate area | 2.51 m² |
| Firebox surface | 13.281 m² |
| Tube heating surface | 140.939 m² |
| Evaporative heating surface | 154.219 m² |
| Total heating surface | 154.2 m² |
Power plant
| Property | Buenos Aires Great Southern class 8A as built |
|---|---|
| Driver diameter | 1,575 mm |
| Boiler pressure | 12.4 bar |
| Expansion type | simple expansion |
| Cylinders | two, 457 x 660 mm |
Power
| Property | Buenos Aires Great Southern class 8A as built |
|---|---|
| Power source | steam |
| Estimated power | 671 kW (912 PS) |
| Starting effort | 92.5 kN |
Calculated values
| Property | Buenos Aires Great Southern class 8A as built |
|---|---|
| Factor of adhesion | 1 : 5.28 |
| Optimal speed | 45 km/h |
| Power-to-weight ratio | 9.1 kW/t |
| Heating Surface Equivalent | 220.6 m² |
| Cylinder volume/HSE | 1 : 982.84 |
| Adhesive weight/Total | 1 : 1.49 |
| Tractive force/Heating surface | 1 : 12.52 |
| Grate area/Heating surface | 1 : 61.44 |
| Firebox/Tube surface | 1 : 10.61 |
