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Northern Pacific Class A

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Northern Pacific Class A
Type and origin
References:[1][2]
Power typeSteam
BuilderALCO-Schenectady
Serial number67010, 67011-67021
Build date1926
Total produced12
Specifications
Configuration:
 • Whyte4-8-4
Gauge1,435 mm (4 ft 8 12 in) standard gauge
Driver dia.73 in (1.854 m)
Wheelbase90 ft (27 m; 1,100 in; 27,000 mm)
 • Engine47.17 ft (14.38 m; 566.0 in; 14,380 mm)
Axle load63,000 lb (29,000 kg; 29,000,000 g)
Adhesive weight251,000 lb (114,000 kg; 114,000,000 g)
Loco weight418,000 lb (190,000 kg; 190,000,000 g)
Tender weight313,000 lb (142,000 kg; 142,000,000 g)
Total weight731,000 lb (332,000 kg; 332,000,000 g)
Fuel capacity24 US gal (91 l; 91,000 ml)
Water cap15,000 US gal (57,000 l; 57,000,000 ml)
Boiler pressure210 psi (1.4 MPa; 1,400 kPa)
CylindersTwo, Outside
Cylinder size28 in × 30 in (710 mm × 760 mm)
Performance figures
Tractive effortLocomotive: 57,511 lbf (255.82 kN)
Booster: 11,400 lbf (50.71 kN)
Factor of adh.4.36
Career
OperatorsNorthern Pacific Railway
Numbers2600-2611
Withdrawn1949–1959
DispositionAll scrapped

The Northern Pacific Class A was a class of 12 4-8-4 "Northern" type steam locomotives that were built by ALCO’s Schenectady Works for the Northern Pacific Railway in 1926.[1][2]

History

In the 1900s, the Northern Pacific Railway needed a new steam locomotive for use on their system, so ALCO approached its own Schenectady Locomotive Works where they drew up plans for a 4-8-4 "Northern" type steam locomotive for the Northern Pacific Railway, resulting in the creation of the Northern Pacific Class A.[1][2]

These locomotives were constructed in 1926, and a total of twelve examples of these 4-8-4 "Northern" steam locomotives were ever constructed by ALCO’s Schenectady Works, and all twelve examples were delivered to the Northern Pacific Railway that same year in 1926.[1]

Withdrawal of the class occurred between 1949–1959, and the last example was taken out of service, and all twelve examples were cut up for scrap, thus rendering them extinct.[1]

References

  1. 1.0 1.1 1.2 1.3 1.4 "Northern Pacific 4-8-4 "Northern" Locomotives in the USA". www.steamlocomotive.com. Retrieved 2023-11-26.
  2. 2.0 2.1 2.2 Hollingsworth, John Brian (1982). The Illustrated Encyclopedia of the World's Steam Passenger Locomotives: A Technical Directory of Major International Express Train Engines from the 1820s to the Present Day. Crescent Books. p. 120. ISBN 978-0-517-37486-3. Search this book on Cite error: Invalid <ref> tag; name ":0" defined multiple times with different content

Further reading

External links


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