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Athearn ATH22906: 4-8-8-4 Big Boy with DCC & Sound. Union Pacific #4007.
Note: Sold Out

Discounts Apply !
5% Additional Discount on all orders over $199
List Price: AU$ 666.64
Price: AU$ 449.00
299.30 USD 404.10 CAD
  In Stock 0
Sorry but we are SOLD OUT of this item and have no stock left. This Locomotive is brand new and never run. It was an impulse buy that does not fit into the Denver's RailRoads layout as UP ran its Big Boys north of Denver on almost exclusively the mountainous region between Cheyenne on the Wyoming Division and Ogden, Utah.
This Locomotive is fitted with McHenry Knuckle couplers. It is in its original new "Level 1+ Quality" condition. This Loco has not only never been run, but it has never been removed from its protective packaging. The picture of the unit is from Athearns web site. There are no cracks in the box, which is the original.
Product ID 2695
Manufacturer Athearn
  ISBN 22906
Date Added
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Produced from 1941 to 1944 by the American Locomotive Company of Schenectady, N.Y., exclusively for the Union Pacific Railroad, the Big Boy locomotives were designed primarily to handle heavy freight traffic in the Wasatch Mountains, where trains faced a continuous grade of 1.55 percent on a stretch of track east of Ogden, Utah.
A Big Boy locomotive along with its tender weighed about 604 tons and measured more than 132 feet (40 metres) in length. It had a maximum power capacity of more than 6,000 horsepower and could haul a 3,600-ton train unassisted up the Wasatch Mountain grade. Pulling freight on level track, it could achieve a speed of 70 miles (112 km) per hour.
The Big Boy locomotives had an articulated design; the frame of the front engine was hinge-connected to the rear engine under a single boiler. The wheel arrangement was designated 4-8-8-4—i.e., a set of 4 pilot wheels led a set of 8 coupled driving wheels, which were compounded by another set of 8 coupled drivers, with 4 trailing wheels.
Twenty-five Big Boys were produced. They operated almost exclusively in the mountainous region between Cheyenne, Wyo., and Ogden, Utah, and their most prominent service was the pulling of long trains loaded with agricultural produce. They were gradually replaced by diesel-electric locomotives; the last one was taken out of regular service in 1959. Preserved Big Boy locomotives can be seen today in railroad museums in Cheyenne, Denver, Omaha, Neb., St. Louis, Mo., and other cities.
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