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Southern Pacific Class GS-2 Streamlined Steam Locomotive
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.

GS-2 Overview
Type and origin
Power: type Steam
Builder: Lima Locomotive Works
Serial number: 7646–7651
Build date: December 1936
Total produced: 6
Configuration: 4-8-4
UIC classification: 2′D2′ h2
Gauge: 4 ft 8 1⁄2 in standard gauge
Driver diameter: 73 in
Axle load: 67,000 lb
Weight on drivers: 266,500 lb
Locomotive weight: 448,400 lb
Locomotive and tender combined weight: 821,400 lb
Fuel type: Fuel oil
Fuel capacity: 6,275 US gal
Water capacity: 22,000 US gal
Boiler pressure: 250 psi
Firegrate area: 90.2 sq ft
Heating surface: Total 4,858 sq ft
Superheater area: 2,565 sq ft
Cylinders: Two, outside
Cylinder size: 27 in × 30 in
Performance figures
Tractive effort: 62,200 lbf , 74,710 lbf with booster
Operator: Southern Pacific Company
Class: GS-2
Numbers: 4410–4415
First run: January 1937
Retired: 1956
Disposition: All scrapped

See also:

Daylight Passenger Train

Southern Pacific

Daylighting the Padres' Trail - a classic Southern Pacific promotional film

SP GS-3 Locomotive

Streamlined Steam Locomotives

4-8-4 Northern Locomotives

Steam Locomotives

GS-2 No. 4412 pulling the "Daylight" between San Francisco and Los Angeles.

The debut of Southern Pacific's Daylight in 1937.The debut of Southern Pacific's Daylight in 1937.

The debut of Southern Pacific's Daylight in 1937.

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Classic Streamliners - TRAIN​CYCLOPEDIA

Lima Locomotive Works logo.
SP Daylight logo.
GS-2 No. 4412 pulling the Daylight between San Francisco and Los Angeles.
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A GS-2 Slideshow.