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Page views since 2023-01-26: 4656051
Buenos Aires Pacific No. 2101 to 2112
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Argentina | 1926
12 produced
Image of locomotive
Locomotive Magazine, June 1928

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.

General
Built1926
ManufacturerArmstrong Whitworth
Wheel arr.4-6-2 (Pacific) 
Gauge5 ft 6 in (Indian broad gauge)
Dimensions and Weights
Length70 ft 6 in
Wheelbase35 ft 4 in
Rigid wheelbase13 ft 6 in
Total wheelbase61 ft 2 in
Empty weight179,928 lbs
Service weight205,520 lbs
Adhesive weight122,696 lbs
Total weight356,552 lbs
Axle load41,720 lbs
Water capacity7,026 us gal
Fuel capacity19,040 lbs (coal)
Boiler
Grate area42.3 sq ft
Firebox area188 sq ft
Tube heating area2,166.5 sq ft
Evaporative heating area2,354.5 sq ft
Superheater area460 sq ft
Total heating area2,814.5 sq ft
Power Plant
Driver diameter71 in
Boiler pressure175 psi
Expansion typesimple
Cylindersthree, 18 x 28 in
Power
Power sourcesteam
Estimated power1,500 hp (1,119 kW)
Starting effort28,510 lbf
Calculated Values
steam locomotive
express
last changed: 08/2025
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