Southern Pacific class GS-1

Southern Pacific GS-1
Power type	Steam
Builder	Baldwin Locomotive Works
Serial number	T&NO: 61390–61391, 61408–61409 SP: 61410–61415, 61430–41433
Build date	May–July 1930
Total produced	14
Configuration	4-8-4
UIC classification	2′D2′ h2
Gauge	4 ft 8 1⁄2 in (1,435 mm)
Driver diameter	73+1⁄2 in (1,867 mm)
Axle load	67,000 lb (30.4 tonnes)
Weight on drivers	262,000 lb (118.8 tonnes)
Locomotive weight	442,300 lb (200.6 tonnes)
Locomotive & tender combined weight	733,300 lb (332.6 tonnes)
Fuel type	Fuel oil
Fuel capacity	4,690 US gal (17,800 l; 3,910 imp gal)
Water capacity	16,150 US gal (61,100 l; 13,450 imp gal)
Boiler pressure	250 psi (1.72 MPa)
Firegrate area	90.2 sq ft (8.38 m2)
Heating surface: Total	4,858 sq ft (451.3 m2)
Superheater area	2,565 sq ft (238.3 m2)
Cylinders	Two, outside
Cylinder size	27 × 30 in (686 × 762 mm)
Valve gear	Walschaerts
Tractive effort	62,200 lbf (276.68 kN), 75,910 lbf (337.66 kN) with booster
Career	Southern Pacific Company Texas and New Orleans Railroad
Class	GS-1
Number	SP: 4400–4409, T&NO: 700–703 (later SP second 4400, 4403, 4404, 4407)
Retired	1956
Disposition	All scrapped

The GS-1 was a 4-8-4 Northern type steam locomotive that served the Southern Pacific Railroad and its Texas subsidiary the Texas and New Orleans Railroad from 1930 to 1956. They were built by Baldwin Locomotive Works and were numbered 4400 through 4409. GS stands for "Golden State" or "General Service."

The GS-1 had all of the basic steam locomotive features; a silver smokebox with a mounted single headlight with a bell mounted just above it, teardrop classification lights, and whistles.

They were assigned to various passenger trains throughout the SP system, and ended their careers on the San Jose-San Francisco commutes.

No GS-1 locomotives survive.

References

• Diebert, Timothy S. and Strapac, Joseph A. (1987). Southern Pacific Company Steam Locomotive Conpendium. Shade Tree Books. ISBN 0-930742-12-5.