Southern Pacific class GS-2

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Southern Pacific GS-2
Southern Pacific Daylight GS-2 locomotive.
The debut of Southern Pacific's Daylight in 1937.
Type and origin
Power typeSteam
BuilderLima Locomotive Works
Serial number7646–7651
Build date1937[1]
Total produced6
 • Whyte4-8-4
 • UIC2′D2′ h2
Gauge4 ft 8 12 in (1,435 mm) standard gauge
Driver dia.73 in (1,854 mm)
Axle load67,000 lb (30,000 kilograms; 30 metric tons)
Adhesive weight266,500 lb (120,900 kg; 120.9 t)
Loco weight448,400 lb (203,400 kg; 203.4 t)
Total weight821,400 lb (372,600 kg; 372.6 t)
Fuel typeFuel oil
Fuel capacity4,900 US gal (19,000 l; 4,100 imp gal)[1]
Water cap22,000 US gal (83,000 l; 18,000 imp gal)
 • Firegrate area
90.2 sq ft (8.38 m2)
Boiler pressure250 psi (1.72 MPa)
Heating surface4,858 sq ft (451.3 m2)
 • Heating area2,565 sq ft (238.3 m2)
CylindersTwo, outside
Cylinder size27 in × 30 in (686 mm × 762 mm)
Performance figures
Tractive effort62,200 lbf (276.68 kN), 74,710 lbf (332.33 kN) with booster
OperatorsSouthern Pacific Company
First runJanuary 1937
DispositionAll scrapped

The GS-2 was a streamlined 4-8-4 Northern type steam locomotive that served the Southern Pacific Company from 1937 to 1956. They were built by Lima Locomotive Works and were numbered 4410 through 4415. GS stands for "Golden State" or "General Service."

The GS-2 had a very different appearance than that of the GS-1; the GS-2s were streamlined and designed for high-speed passenger service. They featured a silver smokebox with a cone-shaped single headlight casing, skyline casing on the top of the boiler, skirting on the sides, and an air horn, they retained the teardrop classification lights and whistles.

They were the first to receive the red and orange "Daylight" paint scheme and were used for the streamlined debut of Southern Pacific's premier passenger train, the Coast Daylight in 1937; the following year they were replaced by the improved GS-3 engines. During World War II, they were painted black and silver and were used to transport troops. In the 1950s their side skirting was removed for easier maintenance, and the locomotives were assigned to general service, pulling such trains as San Jose-San Francisco commutes, the "Coast Mail" trains, and freight service.

No GS-2 locomotives survive.


  1. ^ a b Avery 1994, p. 65.

Further reading[edit]

  • Diebert, Timothy S. & Strapac, Joseph A. (1987). Southern Pacific Company Steam Locomotive Conpendium. Shade Tree Books. ISBN 0-930742-12-5.
  • Avery, Derek (1994), 20th‑Century Steam (1st ed.), Wordsworth Editions, ISBN 1-85326-816-X
  • Church, Robert J. (2004). Southern Pacific Daylight Locomotives (1st ed.). Signature Press. ISBN 978-1930013117.

External links[edit]