Buenos Aires Pacific No. 2101 to 2112
Argentina 1926 12 produced
The numbers 2101 to 2112 were eleven three-cylinder Pacifics built by Armstrong Whitworth in 1926 for the Buenos Aires Pacific. The boiler had a relatively small superheater of only 460 square feet, what was normal for British-built locomotives. But the grate was large, since they were intended for heavy express service over the Transandine railway to Chile. The 661 miles between Buenos Aires and Mendoza were completed in 21 hours.
Technical data
General
- Built
- 1926
- Manufacturers
- Armstrong Whitworth
- Wheel arrangement
- 4-6-2 (Pacific)
- Gauge
- 1,676 mm (Indian broad gauge)
Dimensions and weights
- Length
- 21.49 m
- Wheelbase
- 10.77 m
- Total wheelbase
- 18.64 m
- Empty mass
- 81.6 t
- Service mass
- 93.2 t
- Adhesion mass
- 55.7 t
- Total mass
- 161.7 t
- Rigid wheelbase
- 4.12 m
- Axle load
- 18.9 t
- Water capacity
- 26,596 l
- Fuel capacity
- 8.6 t (coal)
Boiler
- Grate area
- 3.925 m²
- Firebox surface
- 17.466 m²
- Tube heating surface
- 201.278 m²
- Evaporative heating surface
- 218.744 m²
- Superheater surface
- 42.735 m²
- Total heating surface
- 261.5 m²
Power plant
- Driver diameter
- 1,803 mm
- Boiler pressure
- 12.1 bar
- Expansion type
- simple expansion
- Cylinders
- three, 457 x 711 mm
Power
- Power source
- steam
- Estimated power
- 1,119 kW (1,521 PS)
- Starting effort
- 126.8 kN
Calculated values
- Factor of adhesion
- 1 : 4.31
- Optimal speed
- 55 km/h
- Power-to-weight ratio
- 12.0 kW/t
- Heating Surface Equivalent
- 391.5 m²
- Cylinder volume/HSE
- 1 : 894.61
- Adhesive weight/Total
- 1 : 1.68
- Tractive force/Heating surface
- 1 : 10.13
- Grate area/Heating surface
- 1 : 66.62
- Firebox/Tube surface
- 1 : 11.52
- Total/Superheater
- 1 : 5.12
