| Southern Pacific GS-2 class |
|---|
Southern Pacific GS-2 No. 4412 with the C. P. Huntington locomotive in December 1936 |
| Type and origin |
|---|
| Power type | Steam |
|---|
| Builder | Lima Locomotive Works |
|---|
| Serial number | 7646–7651 |
|---|
| Build date | December 1936 |
|---|
| Total produced | 6 |
|---|
|
| Specifications |
|---|
Configuration:
| |
|---|
| • Whyte | 4-8-4 |
|---|
| • UIC | 2′D2′ h2 |
|---|
| Gauge | 4 ft 8+1⁄2 in (1,435 mm) standard gauge |
|---|
| Leading dia. | 36 in (914 mm) |
|---|
| Driver dia. | 73+1⁄2 in (1,867 mm) |
|---|
| Trailing dia. | 45+1⁄2 in (1,156 mm) |
|---|
| Axle load | 67,000 lb (30,000 kilograms; 30 metric tons) |
|---|
| Adhesive weight | 266,500 lb (120,900 kg; 120.9 t) |
|---|
| Loco weight | 448,400 lb (203,400 kg; 203.4 t) |
|---|
| Total weight | 821,400 lb (372,600 kg; 372.6 t) |
|---|
| Fuel type | Fuel oil |
|---|
| Fuel capacity | 6,010 US gal (22,800 L; 5,000 imp gal) |
|---|
| Water cap. | 22,000 US gal (83,000 L; 18,000 imp gal) |
|---|
| Firebox: | |
|---|
| • Grate area | 90.2 sq ft (8.38 m2) |
|---|
| Boiler pressure | 250 psi (1.72 MPa) |
|---|
| Heating surface | 4,858 sq ft (451.3 m2) |
|---|
Superheater:
| |
|---|
| • Heating area | 2,565 sq ft (238.3 m2) |
|---|
| Cylinders | Two, outside |
|---|
| Cylinder size | 27 in × 30 in (686 mm × 762 mm) |
|---|
| Valve gear | Walschaerts |
|---|
|
| Performance figures |
|---|
| Maximum speed | At least 90 mph (145 km/h) |
|---|
| Power output | 4500hp at 55 mph (89 km/h) |
|---|
| Tractive effort | 62,200 lbf (276.68 kN), 75,950 lbf (337.84 kN) with booster |
|---|
|
| Career |
|---|
| Operators | Southern Pacific |
|---|
| Class | GS-2 |
|---|
| Numbers | 4410–4415 |
|---|
| First run | January 1937 |
|---|
| Retired | 1955-1958 |
|---|
| Disposition | All scrapped |
|---|
|
| References: |
The GS-2 was a class of streamlined 4-8-4 "Northern" type steam locomotive operated by the Southern Pacific Railroad (SP) from 1937 to 1958. A total of six were built by the Lima Locomotive Works, numbered 4410 through 4415. GS stands for "Golden State" or "General Service."
.jpg){kind=link}