Marklin 39400 Union Pacific 4000 Big Boy Steam Locomotive (~AC-Sound) HO Gauge

Union Pacific 4000 Big Boy Steam Locomotive (~AC-Sound) 1:87 scale model produced by Marklin. This model is ready-to-run straight out of the box and would make a excellent addition to any model railway collection. Features: AC Sound Model This model mainly operates in USA This model is decorated in Union Pacific company markings This model is best suited to 438mm radius curves The smoke box door, upper boiler part, the tender body, the driving wheels, pilot wheels and trailing truck wheels, the side rods and drive rods, as well as various other metal parts are plated with 24 carat gold. Limited worldwide to 1,776 locomotives. Each "Big Boy" is consecutively numbered. There is also a consecutively numbered certificate of authenticity. Exclusive packaging. World of Operation mfx+ digital decider and extensive operating and sound functions included. Details The Union Pacific Big Boy is one of the most famous and powerful steam locomotives ever built, created to haul extremely heavy freight trains over the steep grades of the Wasatch Range and Sherman Hill on the Union Pacific Railroad. Designed in the late 1930s, these enormous steam giants were built by the American Locomotive Company (ALCO) and operated from 1941 to 1962. 25 Big Boy locomotives were constructed in two batches, with road numbers 4000–4019 and 4020–4024. Big Boys feature a 4-8-8-4 articulated wheel arrangement, with four leading wheels, two sets of eight driving wheels and four trailing wheels supporting a huge firebox. This design allowed the massive locomotive, over 132 feet long and weighing well over a million pounds with its tender, to negotiate curves despite its size. With drawbar power up to around 7,000 hp and incredible tractive effort, the Big Boy could haul trains of 3,600 tons or more unassisted over mountain grades and sustain speeds of over 80 mph on level track. These locomotives worked primarily between Ogden, Utah, and Cheyenne, Wyoming, handling heavy freight throughout World War II and the post-war era. As diesels replaced steam in the 1950s, Big Boys were gradually retired, with the last revenue service run in 1959.