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US Railroad Administration Heavy Santa Fé
United States | 1918 | 175 produced
Pennsylvania Rairoad N2sa No. 8110 in 1933 in Columbus, Ohio
Pennsylvania Rairoad N2sa No. 8110 in 1933 in Columbus, Ohio
collection Taylor Rush
Schematic drawing with dimensions
Schematic drawing with dimensions
1922 Locomotive Cyclopedia of American Practice

The USRA standard model for heavy, slow coal trains was the Heavy Santa Fé. ALCO-Brooks delivered 135 and Baldwin 40 more. By far the largest number were the 130 members of the Pennsylvania Railroad's class N2s. The locomotives were generally considered a successful design that fulfilled their tasks satisfactorily. As early as 1923, the PRR rebuilt them with new boilers with Belpaire fireboxes and renamed them class N2sa. A fundamental problem with the Heavy Santa Fé was the very long frame, which was not cast in one piece. This warped over time, leading to increased maintenance costs.

General
Built1918-1919
ManufacturerALCO, Baldwin
Axle config2-10-2 (Santa Fé) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Length loco55 ft 3 7/8 in
Wheelbase42 ft 2 in
Fixed wheelbase22 ft 4 in
Total wheelbase82 ft 10 1/2 in
Service weight380,000 lbs
Adhesive weight293,000 lbs
Total weight586,100 lbs
Axle load58,600 lbs
Water capacity12,000 us gal
Fuel capacity32,000 lbs (coal)
Power
Power sourcesteam
Estimated power3,800 hp (2,834 kW)
Optimal speed33 mph
Top speed35 mph
Starting effort73,829 lbf
Power Plant
Driver diameter63 in
Boiler pressure190 psi
Expansion typesimple
Cylinderstwo, 30 x 32 in
Boiler
Grate area83.2 sq ft
Firebox area429 sq ft
Tube heating area4,727 sq ft
Evaporative heating area5,156 sq ft
Superheater area1,230 sq ft
Total heating area6,386 sq ft
Calculated Values
steam locomotive
freight
last changed: 11/2023
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