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Buenos Aires Great Southern classes 12A, 12B and 12D
Beginning in 1907, the Buenos Aires Great Southern received some batches of Ten-Wheelers with different cylinder configurations from British manufacturers. The first was the class 12A with a two-cylinder compound engi...
| Buenos Aires Great Southern classes 12A, 12B and 12DRemove | |
|---|---|
| Variant | 12B |
| Built | 1907 |
| Manufacturers | Vulcan Foundry |
| Wheel arrangement | 2C |
| Gauge | 1676 mm |
| Length | |
| Service mass | 70107 kg |
| Top speed | |
| Power | |
| Engine |
General
| Property | Buenos Aires Great Southern classes 12A, 12B and 12D12B |
|---|---|
| Built | 1907 |
| Manufacturers | Vulcan Foundry |
| Wheel arrangement | 4-6-0 (Ten-wheeler) |
| Gauge | 1,676 mm |
Dimensions and weights
| Property | Buenos Aires Great Southern classes 12A, 12B and 12D12B |
|---|---|
| Wheelbase | 7.90 m |
| Service mass | 70.1 t |
| Adhesion mass | 46.7 t |
| Total mass | 116.8 t |
| Rigid wheelbase | 3.86 m |
| Axle load | 15.6 t |
| Water capacity | 18,185 l |
| Fuel capacity | 7.1 t (coal) |
Boiler
| Property | Buenos Aires Great Southern classes 12A, 12B and 12D12B |
|---|---|
| Grate area | 2.601 m² |
| Firebox surface | 12.635 m² |
| Tube heating surface | 155.799 m² |
| Evaporative heating surface | 168.433 m² |
| Total heating surface | 168.4 m² |
Power plant
| Property | Buenos Aires Great Southern classes 12A, 12B and 12D12B |
|---|---|
| Driver diameter | 1,829 mm |
| Boiler pressure | 15.5 bar |
| Expansion type | compound |
| Cylinders | four, HP: 356 x 660 mm and LP: 584 x 660 mm |
Power
| Property | Buenos Aires Great Southern classes 12A, 12B and 12D12B |
|---|---|
| Power source | steam |
| Estimated power | 634 kW (862 PS) |
| Starting effort | 87.9 kN |
| Starting effort simple | 105.4 kN |
Calculated values
| Property | Buenos Aires Great Southern classes 12A, 12B and 12D12B |
|---|---|
| Factor of adhesion | 1 : 5.22 |
| Optimal speed | 43 km/h |
| Power-to-weight ratio | 9.0 kW/t |
| Heating Surface Equivalent | 231.6 m² |
| Cylinder volume/HSE | 1 : 1,330.66 |
| Adhesive weight/Total | 1 : 1.50 |
| Tractive force/Heating surface | 1 : 10.90 |
| Grate area/Heating surface | 1 : 64.76 |
| Firebox/Tube surface | 1 : 12.33 |
