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Page views since 2023-01-26: 1461570
Southern Pacific class GS-6
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United States | 1943
10 produced
Image of locomotive
collection Taylor Rush

The GS-6 was the last 4-8-4 “Golden State” locomotive built for the Southern Pacific. Lima built ten in 1943 which got the numbers 4460 to 4469. Designed in World War II, they got the nickname “War Babies”. They were designed for dual service and had the same driver and cylinder dimensions as the GS-1 and GS-2.

Compared to their direct predecessors in the form of the GS-5, they had no streamlining, but a pointed smokebox door and skyline casing. Other features where the boxpok drivers and originally the wartime shield over the headlight as seen in the photo. The GS-6 could be seen on trains like the San Joaquin Daylight, but also on commuter trains. Their career ended in 1958 and today 4460 can be seen on static display at the Museum of Transportation in Kirkwood, Missouri.

General
Built1943
ManufacturerLima
Axle config4-8-4 (Northern) 
Gauge4 ft 8 1/2 in (Standard gauge)
Dimensions and Weights
Wheelbase45 ft 10 in
Service weight468,400 lbs
Adhesive weight270,000 lbs
Total weight786,200 lbs
Axle load67,900 lbs
Water capacity23,200 us gal
Fuel capacity6,080 us gal (oil)
Boiler
Grate area90.2 sq ft
Firebox area350 sq ft
Tube heating area4,502 sq ft
Evaporative heating area4,852 sq ft
Superheater area1,834 sq ft
Total heating area6,686 sq ft
Power Plant
Driver diameter73.5 in
Boiler pressure260 psi
Expansion typesimple
Cylinderstwo, 27 x 30 in
Power
Power sourcesteam
Estimated power4,700 hp (3,505 kW)
Optimal speed46 mph
Starting effort65,759 lbf
Calculated Values
steam locomotive
passenger
freight
last changed: 01/2025
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