Detailed driver's cab Movable Wheels 87 parts, skill level 3 Decals for 2 Union Pacific versions Illustrated assembly instructions Revell 1/87 Big Boy Locomotive, PL The American "Big Boy" is one of the longest and largest steam locomotives ever built.During the late 1930's, Union Pacific railroad often used auxiliary engines to haul trains up a steep pass from Ogden to Wasatch, Utah. Eventually, they designed the "Big Boy" as a new locomotive capable of hauling a 3,600-4,200 ton train up the steep pass.The 25 "Big Boy" locomotives were built in 2 groups. The first group, called the Class 1, was built in 1941. The second group, Class 2, was built in 1944. The last hauling run was in 1959, and most "Big Boys" were retired from service by 1961.Now, you can recapture the nostalgia and preserve the railroad heritage with this detailed model!Skill Level 387 partsScale: 1:87 HOLength: 18-1/4" (464mm)Width: 1-3/8" (35mm)Features:Length: Approx 18-3/4" (48 cm)Separate butterlfy damperDetailed driver's cabMoveable pony trucksDetailed driving wheelsDetailed driving rodsFront cow-catcherDetailed tender with laddersFinely-detailed reproduction tracksDecals for 2 different Union Pacific versionsRequires some modeling skills. Glue is required for assembly, and paint (black, steel, aluminum, anthracite, bright red) is recommended for authentic appearance.