N 4-6-6-4 Challenger Union Pacific #3976 DCC and Sound Locomotive (ATH25744)

An N-scale Union Pacific 4-6-6-4 Challenger #3976 with DCC and sound, built to reproduce UP’s wartime Challenger, delivers authentic power on modern layouts. In a two-tone gray UP scheme with yellow lettering and striping, this oil-burner features dual smokestacks and era-appropriate detailing for late-1940s through mid-1950s operation, and it comes fully assembled and ready to run.

Designed for authentic operation, it offers easy DCC wiring with Quick Plug, a tender-mounted decoder with SoundTraxx Tsunami2 sound, and full DC/DCC compatibility. The model rides on a heavy die-cast frame for traction and strength, with a five-pole motor and flywheel for smooth performance. Realistic touches include LED lighting, see-through running boards and cab windows, a full cab interior with backhead gauges, individually applied piping and valves, and operating eccentric cranks with McHenry scale knuckle couplers. Pivoting front and rear engines let the locomotive negotiate 11-inch radius curves, while a 15-inch minimum radius keeps operation reliable. Fully assembled and ready to run, this Challenger captures UP power and character on the railroad.