The 4-8-8-4 "Big Boy" steam locomotives were built specifically for the Union Pacific Railroad and were manufactured from 1941 to 1944. Twenty-five were produced, numbering from #4000-4024.
This HO scale model — equipped for DCC & Sound — features factory-installed Tsunami sound (including chuff, bell, whistle, and more), an accompanying rear coal tender, a flickering LED firebox, individually applied piping and valves, LED lighting, see-through cabin windows, a ready-to-use smoke unit, precision slow-speed control, five-pole motor with dual flywheels for smooth operation, pivoting front and rear engines, see-through running boards, RP25 metal wheels, and magnetically operated knuckle couplers. Arrives ready to roll. Measures approximately 16" long.