Southern Pacific Class GS-8
Type and origin
Power typeSteam
BuilderPine Bluff Shops
Build date1930
Total produced4
Specifications
Configuration:
​
 • Whyte4-8-4
 • UIC2′D2′ h2
Gauge4 ft 8+1⁄2 in (1,435 mm)
Driver dia.70 in (1,778 mm)
Length
  • Total: 99 ft 8+1⁄2 in (30.39 m)
  • Tender: 38 ft 9 in (11.81 m)
Width10 ft 5+5⁄8 in (3.191 m)
Height15 ft 10 in (4.826 m)
Axle load62,000 lb (28.1 tonnes)
Adhesive weight248,000 lb (112.5 tonnes)
Loco weight438,500 lb (198.9 tonnes)
Tender weight312,000 lb (141.5 tonnes)
Total weight750,500 lb (340.4 tonnes)
Fuel typeOil
Fuel capacity5,000 US gal (19,000 L; 4,200 imp gal)
Water cap.15,000 US gal (57,000 L; 12,000 imp gal)
Firebox:​
 • Grate area88.3 sq ft (8.20 m2)
Boiler pressure250 lbf/in2 (1.72 MPa)
Heating surface:​
 • Firebox469 sq ft (43.6 m2)
Superheater:
​
 • Heating area1,962 sq ft (182.3 m2)
CylindersTwo
Cylinder size26 in × 30 in (660 mm × 762 mm)
Valve gearWalschaerts
Valve typePiston valves
Performance figures
Tractive effort61,564 lbf (273.85 kN)
Factor of adh.4.03
Career
OperatorsSt. Louis Southwestern "Cotton Belt"
Southern Pacific Transportation Company
ClassCotton Belt L1
Southern Pacific GS-8
NumbersSSW #813, #813, #817-818
SP #4488 (SSW #813), 4485-4487 (815-818)
Delivered1930
Retired1957
Scrapped1957
DispositionAll scrapped

The Southern Pacific Class GS-8 is a class of four 4-8-4 "Northern" type steam locomotives built by the Baldwin Locomotive Works for the St. Louis Southwestern Railway (also known as the "Cotton Belt Route"), as Cotton Belt Class L-1 steam locomotives but would be later leased to the Southern Pacific Transportation Company where they would be classified as GS-8.[1][2]

History

During the second World War, the Southern Pacific Transportation Company needed more motive power to tackle the issues throughout the second World War, the St. Louis Southwestern Railway decided to make an agreement with the Southern Pacific Transportation Company to lease seven of their own Class L1 4-8-4 locomotives to the Southern Pacific Transportation Company, this resulted in what would become the Southern Pacific Class GS-8.[1][2]

The Southern Pacific class GS-8 actually was one of two classes of ex-Cotton Belt Route Class L1 that were leased to the Southern Pacific Transportation Company, with the other one being the GS-7.[3]

The Southern Pacific class GS-7 and GS-8 locomotives were built at the exact same time that their GS-1 locomotives were built.[3]

None were four Southern Pacific Class GS-8 locomotives were preserved, all four of them were retired from active service on the Southern Pacific Transportation Company and they were scrapped.[1]

See also

References

  1. 1 2 3 Dunscomb., Guy L. (1963). A Century of Southern Pacific Steam Locomotives, 1862-1962. Guy L. Dunscomb. pp. 301, 304, 317.
  2. 1 2 Strapac (1999), p. 140
  3. 1 2 Garratt, Colin; Wade-Matthews, Max (2003). Illustrated Book of Steam and Rail - The History and Development of the Train and an Evocative Guide to the World's Great Train Journeys. Barnes & Noble Books. p. 87. ISBN 9780760749524.

Further reading

  • Dunscomb., Guy L. (1963). A Century of Southern Pacific Steam Locomotives, 1862-1962. Guy L. Dunscomb. pp. 301, 304, 317.
  • Garratt, Colin; Wade-Matthews, Max (2003). Illustrated Book of Steam and Rail - The History and Development of the Train and an Evocative Guide to the World's Great Train Journeys. Barnes & Noble Books. ISBN 9780760749524.
  • Strapac, Joseph (1999). Cotton Belt Locomotives. Indiana University Press. ISBN 9780253336019.
  • Church., Robert J. (1976). 4-8-4's Daylight The Complete Story of the Southern Pacific GS Class 4400 Series Locomotives. Kratville Publications.
  • Church., Robert J. Mainline Modeler June 1995 - Southern Pacific GS-1 History and Plans.
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