Union Pacific 3977

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Union Pacific 3977
Photo of Union Pacific Challenger 3977
Type and origin Power type Steam Designer Otto Jabelmann Builder American Locomotive Company (ALCO) Serial number 70160 Build date June 1943
Specifications Configuration: ​  • Whyte 4-6-6-4  • UIC (2′C)C2′ h4g Gauge 4 ft 8 1⁄2 in (1,435 mm) standard gauge Driver dia. 69 in (1,753 mm) Wheelbase 60 ft 4 1⁄2 in (18.402 m) Engine 121 ft 10 7⁄8 in (37.157 m) Engine + tender Adhesive weight 403,700 lb (183,115 kg) Loco weight 627,000 lb (284,000 kg) Tender weight 436,500 lb (198,000 kg) Total weight 1,063,500 lb (482,400 kg) Fuel type Coal, oil Fuel capacity 32 short tons (29 t; 29 long tons) Water cap 25,000 US gal (95,000 l; 21,000 imp gal) Firebox:  • Firegrate area 132 sq ft (12 m2) (grate removed in 1990) Boiler 94 in (2,400 mm) Boiler pressure 280 lbf/in2 (1.93 MPa) Heating surface 4,795 sq ft (445.5 m2)  • Tubes 527 sq ft (49.0 m2)  • Flues 3,687 sq ft (342.5 m2)  • Firebox 602 sq ft (55.9 m2) Superheater: ​  • Heating area 2,162 sq ft (200.9 m2) Cylinders Four Cylinder size 21 in × 32 in (533 mm × 813 mm)
Performance figures Maximum speed 70 mph (110 km/h) Tractive effort 97,352 lbf (433.04 kN) Factor of adh. 4.15
Career Operators Union Pacific Railroad Class 4664-4 Disposition On static display at Cody Park in North Platte, Nebraska

Union Pacific 3977 is a four-cylinder simple articulated 4-6-6-4 "Challenger"-type steam locomotive that was built by the American Locomotive Company (ALCO) for the Union Pacific Railroad in July of 1943.

History

Union Pacific 3977 was manufactured in July of 1943 by the American Locomotive Company (ALCO) and it was delivered to the Union Pacific Railroad that same year in 1943.In 1952, 3977 was converted to burn oil during the steam era and was renumbered to 3710.Upon being retired and replaced by diesel locomotives that the Union Pacific Railroad had been ordering, No. 3977 was retired in 1958 and was donated to the City of North Platte, Nebraska on October 19th, 1968, where it was placed on static display.

Its counterpart, Union Pacific No. 3985, was the largest operating steam locomotive in the world until the restoration of Union Pacific Big Boy No. 4014 in early May 2019, though it was taken out of service in October 2010 due to mechanical problems, and subsequently retired in January 2020 because of its poor condition.

As of today, Union Pacific 3977 still resides on static display at Cody Park in North Platte, Nebraska, and is still in the Union Pacific's "Greyhound" livery and resides on display with EMD DDA40X #6922.

Further reading

• Fletcher, George. Railfan & Railroad - Volume 22. Carstens Publications. Search this book on
• Railroadman's Magazine - Volumes 91-92. 1972. Search this book on

External links

• Chronological History of UP in North Platte - official website maintained by Union Pacific Railroad
• Photos of UP 3977

This article "Union Pacific 3977" is from Wikipedia. The list of its authors can be seen in its historical and/or the page Edithistory:Union Pacific 3977. Articles copied from Draft Namespace on Wikipedia could be seen on the Draft Namespace of Wikipedia and not main one.

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