| Southern Pacific GS-5 | |
|---|---|
| Power type | Steam |
| Builder | Lima Locomotive Works |
| Serial number | 7856, 7857 |
| Build date | May–June 1942 |
| Total produced | 2 |
| Configuration | 4-8-4 |
| UIC classification | 2′D2′ h2 |
| Gauge | 4 ft 8 1⁄2 in (1,435 mm) |
| Driver diameter | 80 in (2,032 mm) |
| Axle load | 69,600 lb (31.6 tonnes) |
| Weight on drivers | 278,700 lb (126.4 tonnes) |
| Locomotive weight | 483,200 lb (219.2 tonnes) |
| Locomotive & tender combined weight |
796,930 lb (361.5 tonnes) |
| Fuel type | Fuel oil |
| Fuel capacity | 6,275 US gal (23,750 l; 5,225 imp gal) |
| Water capacity | 23,300 US gal (88,000 l; 19,400 imp gal) |
| Boiler pressure | 300 psi (2.07 MPa) |
| Firegrate area | 388 sq ft (36.0 m2) |
| Heating surface: Total |
4,890 sq ft (454 m2) |
| Superheater area | 1,834 sq ft (170.4 m2) |
| Cylinders | Two, outside |
| Cylinder size | 251⁄2 in (648 mm) |
| Valve gear | Walschaerts |
| Tractive effort | 64,800 lbf (288.24 kN), 78,000 lbf (346.96 kN) with booster |
| Career | Southern Pacific |
| Class | GS-5 |
| Number | 4458, 4459 |
| First run | June 1942 |
| Retired | 1958 |
| Disposition | Both scrapped |
The GS-5 was a streamlined 4-8-4 Northern type steam locomotive that served the Southern Pacific Company from 1942 to 1958. Only two locomotives were built by the Lima Locomotive Works and were numbered 4458 and 4459. GS stands for "Golden State" or "General Service."
The GS-5s are exactly identical in appearance to the GS-4s. They only difference was that they were equipped with roller bearings, which gave the locomotive a much smoother ride and added extra weight. 4458 was equipped with roller bearings from the Timken Company and 4459 used SKF brand roller bearings. They featured a silver smokebox with a dual-headlight casing (top headlight was a mars light), and a fully enclosed, all-weather cab. It retained the skyline casing on the top of the boiler, skirting on the sides, an air horn, teardrop classification lights, and whistles. They received the orange and red "Daylight" paint scheme. The GS-5's were designed for high-speed passenger service on Southern Pacific's premier passenger trains, the Coast Daylight, San Joaquin Daylight and Sunset Limited. In later years they were painted black and had their side skirting removed for easier maintenance. The GS-5s were considered the best when it came to the GS series, and ended their careers on Southern Pacific's San Joaquin Valley line.
Neither of the two GS-5 locomotives survive.
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