Union Pacific 4017

Union Pacific 4017 Harriman Wyoming
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Stock #: 614920
Type: Large Format Postcard
City: Harriman
State: Wyoming (WY)
County: Laramie
Publisher: Audio Visual Designs
Size: 6" x 9" (15.25 x 23 cm)
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Big Boy, the world's largest steam locomotive was operated by the Union Pacific Railroad and was noted for its service over Sherman Hill in Wyoming. A truly modern steam locomotive, they survived the diesel invasion until July 21, 1959 when Big Boy 4015 was made the last regular steam locomotive run over Sherman Hill. In this view, 4-8-8-4 No. 4017 has a drag freight in tow west of Harriman, Wyo., October 6, 1958. The articulated 4-8-8-4 wheel arrangement allowed the front set of drivers to move sideways to negotiate normal track curves. Weighing in at 1.2 million pounds and exerting a tractive effort of 135,375 pounds, these giant locomotives were designed to move the freight at speeds up to 80 miles mils per hour. A total of 25 Big Boys were turned out by the American Locomotive Co., in Schenectady, NY from the time No. 4000 deadheaded west on the New York Central in September 1941 until the last group of five, 4020-4024, were delivered to the Union Pacific in November 1944.