N 4-6-6-4 Union Pacific #3985 Modern Steam Locomotive (ATH25541)

An N-scale Union Pacific 4-6-6-4 Challenger in Modern Excursion livery, UP 3985, this ready-to-run steam locomotive brings a legendary engine to life on an N-scale layout. It’s designed for straightforward operation, with DCC-ready Quick Plug plug-and-play technology and LED lighting for realistic visibility. A heavy die-cast frame provides added traction and pulling power, while see-through running boards and a full cab interior deliver authentic detail from every angle.

This version replicates UP’s late-20th-century era as an oil-burner, reflecting the Modern Excursion period from the 1980s to the 2000s. It features pivoting front and rear engines to negotiate curves, McHenry scale knuckle couplers, and carefully applied piping and valves for visual realism. DC and DCC operation are supported, and sound-equipped variants offer tender-mounted DCC decoding with SoundTraxx Tsunami2 for authentic chuff, whistle, and bell sounds. The model carries a minimum recommended radius of about 15 inches on most layouts.