Union Pacific Greyhound LC2 LionMaster Big Boy #4000 Get the best of both worlds with the new LionChief® Plus 2.0 LionMaster Big Boy! Big power, sound and detail in a size that works on O31 curves with the simplicity of LionChief® Bluetooth™ and the added features of Command Control. The largest steam locomotives ever built, Union Pacific's Big Boys where specifically designed for hauling freight on tight schedules up the steep grades west of Cheyenne. In so doing, they built a fame and reputation even larger than their own massive frames. Now equipped with Lionel's latest technologies, this famous monster is ready to come home to your layout. ElectroCouplers RailSounds Smoke Unit TrainMaster Command Control SKU: 1932170 Dimensions: Length: 29" Gauge: O Gauge year: 2019 rail line: Union Pacific Minimum Radius: O31 Scale: Traditional Power: Electric Road Number: 4000 Engine: Steam Manuals Find the latest manuals in our support section. Replacement Parts Buy any replacement parts in our support section. Contact Contact a service station to fix your product