The American Big Boys are among the longest and largest series-produced steam locomotives ever built in the world. During the late 1930s, Union Pacific often used auxiliary locomotives to haul trains from Ogden, Utah to Wasatch over a steep pass. U.P. wanted to simplify this system and commissioned its own development department to design a new locomotive that could pull a 3,600 t train (up to a maximum of 4,200 t) up the steep pass. The 25 Big Boy locomotives were built in 2 groups. The first group, called Class 1, was built from 1941 onwards. The second group (class 2) was built in 1944. The last freight train transport that was handled by a Big Boy locomotive took place in July 1959. Most Big Boys were decommissioned in 1961.

• One-piece boiler replica
• Separate smoke flap
• Detailed train driver’s cab
• Movable bogies
• Detailed drive wheels
• Detailed drive linkage
• Front protection grill
• Detailed coal tender with ladders
• Finely detailed track replica (approx. 48 cm)
• Decals for 2 versions of the Union Pacific In addition to basic paints, glue and brushes are also included.

Dimensions: 46.4cm x 3.9cm x 6cm