Southern Pacific class GS-1

Southern Pacific GS-1

Type and origin 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

Specifications Configuration 4-8-4 UIC class 2′D2′ h2 Gauge 4 ft 8 ^1⁄2 in (1,435 mm) standard gauge Driver dia. 73 ^1⁄2 in (1,867 mm) Wheelbase 88.23 ft (26,893 mm) Axle load 67,000 lb (30,000 kilograms; 30 metric tons) Adhesive weight 262,000 lb (119,000 kg; 119 t) Loco weight 442,300 lb (200,600 kg; 200.6 t) Total weight 733,300 lb (332,600 kg; 332.6 t) Fuel type Fuel oil Fuel capacity 4,690 US gal (17,800 l; 3,910 imp gal) Water cap 16,150 US gal (61,100 l; 13,450 imp gal) Firebox:  • Firegrate area 90.2 sq ft (8.38 m^2) Boiler pressure 250 psi (1.72 MPa) Feedwater heater Worthington Type S, No. 5 Heating surface 4,858 sq ft (451.3 m^2)  • Firebox 356 sq ft (33.1 m^2) Superheater: ​  • Heating area 2,565 sq ft (238.3 m^2) Cylinders Two, outside Cylinder size 27 in × 30 in (686 mm × 762 mm) Valve gear Walschaerts Valve type Piston

Performance figures Tractive effort 62,200 lbf (276.68 kN), 75,910 lbf (337.66 kN) with booster Factor of adh. 4.14

Career Operators Southern Pacific Company Texas and New Orleans Railroad Class GS-1 Number in class 13 Numbers 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 were all equipped with Hancock 3-chime steamboat 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. & Strapac, Joseph A. (1987). Southern Pacific Company Steam Locomotive Conpendium. Shade Tree Books. ISBN 0-930742-12-5.