N GEN 4-8-8-4 Big Boy Locomotive DCC & Sound UP #4020 (ATHG-2256)

Introducing the Union Pacific Big Boy in N scale—a Genesis-class 4-8-8-4 steam locomotive with DCC and sound. This ready-to-run model captures the monumental presence of the era, built on a heavy die-cast frame for sturdy traction and pulling power, powered by a precise 5-pole motor and a reliable drivetrain. It features a boiler backhead with printed gauges, individually applied piping and valves, operating eccentric cranks, and directional headlights that stay aligned with the locomotive’s movement. See-through running boards and cab windows add depth of realism, while body-mounted McHenry operating scale knuckle couplers provide authentic coupling behavior.

Sound-equipped versions include an onboard DCC decoder with SoundTrax Tsunami2 sound, delivering chuff, whistle, and bell sounds with full DCC functionality and NMRA compatibility, along with smooth slow-speed control for realistic operation. Road-name variants reproduce authentic details such as coal or oil burners and cooling pipes (or their absence), and “Legendary Liveries” offer popular, historically inspired paint schemes, including a Greyhound scheme with yellow trim. Primed for grime finishes provide a ready starting point for weathering, and a CV chart is included to help tailor performance and effects to taste.