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HR6170 38ft Skeleton Log Car,NP HO Scale38ft Skeleton Log Car, Northern Pacific,Black, Running No.
HR6172 38ft Skeleton Log Car,Westside Lumber HO SCale38ft Skeleton Log Car, Westside Lumber, Oxide Red,Running No. The Union Pacific's mainline through America, the fabled "Overland Route" started in Omaha, went west across Nebraska and Wyoming before entering Utah. Big Boy was the name of the Union Pacific Railroad's 4000-class 4-8-8-4 articulated steam locomotives, built between 1941 and 1944 by American Locomotive Company (Alco). A magnificent model,the attention to detail is most impressive.Easily the finest model I've ever purchased Thank you! The steepest grade was on the Echo Canyon line through the Wasatch Mountains just east of Ogden, Utah.


The 25 Big Boys were the only locomotives to have the 4-8-8-4 wheel arrangement, which combined two sets of eight driving wheels with a four-wheel leading truck for stability entering curves and a four-wheel trailing truck to support the large firebox. The Big Boy are articulated, per the Mallet locomotive design, but used simple (single) rather than double expansion. The UP Railroad needed a locomotive that could be used to pull a 3,600-ton train over Sherman Hill, located west of Cheyenne, Wyoming and from Ogden to Wasatch, Utah without the need for helpers.The designers decided to use a "simple" articulated locomotive. They were built with a heavy margin of reliability and safety, as they normally operated well below that speed in freight service. According to legend an unidentified machinist at the ALCO plant is responsible for the name "Big Boy", having scrawled the name in chalk on a partially completed locomotive.Initially the Big Boys were used between Ogden, Utah and Green River, Wyoming.
The increase in traffic during WWII resulted in the Union Pacific ordering 5 more Big Boys, numbered 4020 through 4024; built in 1944.


These versions were slightly heavier than the original order due to wartime materials restrictions.Even with the infiltration of diesel locomotives following WWII, the Big Boys and Challengers remained the prime power on the Overland Route. They remained active through the 1950s and weren't retired until the early 1960s.There are eight of the twenty five Big Boys that have been preserved in the following locations #4004 in Cheyenne, #4005 in Denver, #4006 in St.
Louis, #4012 in Scranton, #4014 in Pomona, #4017 in Green Bay, #4018 in Dallas, and #4023 in Omaha.



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