Athearn Genesis UP Big Boy Locomotive 4019
Model Information
Prototype Details
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Model Information
Model Information
The official description provided by the manufacturer.
PROTOTYPE SPECIFIC INFORMATION * Scaled from prototype resources including drawings, The Union Pacific's Overland Route, the eastern portion of the field measurements, photographs, and more Transcontinental Railroad, was built west of Omaha, across Nebraska and * Accurately-painted and -printed paint schemes Wyoming, and on into Utah. The steepest grade was the eastbound climb * Bidirectional constant LED lighting so headlight brightness remains on the Echo Canyon line through the Wasatch Mountains just east of Ogden, constant Utah. Forty 4-6-6-4 Challenger locomotives were acquired in 1936 and 1937 * Minimum radius: 11" to move fast freight over the grades in Utah and Wyoming. They were rated at 4,290 tons across Wyoming, but were limited to 3,100 tons eastbound through Echo Canyon. Union Pacific wanted something that could make the same speeds as the Challengers but could carry the entire 4,290-ton train over the Wasatch Mountains without a helper. The easiest solution was to scale up the successful Challenger design by adding another pair of drivers to each half of the locomotive, thus making a 4-8-8-4. In 1941, UP placed an order for 20 4-8-8-4's, numbered 4000 through 4019, with the American Locomotive Works. Each engine cost $265,174. 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. The Big Boys were exactly what the railroad wanted. They were coal burners with 68-inch drivers, 135,375 pounds of tractive effort and 6,000 horsepower. They started service on the line from Ogden to Green River, Wyoming and their operating range soon increased to cover the line all the way to Cheyenne. PRIMED FOR GRIME LEGENDARY LIVERIES What are Legendary Liveries? An Athearn exclusive, they are the ultimate answer to "What if?" Featuring some of the most popular railroad paint schemes of all time, these models are perfect for collecting, proto- PRIMED FOR GRIME MODELS FEATURE freelancing, or just plain fun! Whether company proposed paint schemes, * Duplicated look and feel of "In Service" equipment canceled locomotive orders, or alternate takes on history, Legendary * Faded base colors matched to the prototype Liveries are fun and unique additions to any roster. Enjoy these items, and * Perfect starting point for adding grime and rust answer the ultimate railroad question of: "What if?" PRIMED FOR GRIME $499.99 w/o SOUND | $599.99 w/ SOUND $489.99 w/o SOUND | $589.99 w/ SOUND Items listed are subject to cancellation if pre-order minimum production quantities are not met. These items are subject to Horizon's MAP policy VISIT Your Local Retailer Orders Due: 01.24.25 CLICK Athearn.com ETA: AUGUST 2026 CALL 1.800.338.4639
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Initial Source: 02_GENN_Big_Boy_122724.pdf