HO GEN 4-8-8-4 Big Boy Locomotive UP #4020 (ATHG-2198)

Meet the HO-scale Genesis 4-8-8-4 Big Boy steam locomotive in Union Pacific livery, UP #4020. This highly detailed model captures the iconic 4-8-8-4 Big Boy prototype at scale, built to haul long trains across mountainous routes on HO layouts. Road-number options include #4000 (as-delivered), #4003 (Primed for Grime), #4019, #4020, and #4024 (Legendary Liveries Greyhound scheme), offering authentic display choices for UP fans and model railroaders alike.

Designed for HO layouts, this locomotive delivers authentic operation and durability. It features illuminated number boards and headlights (headlight turns off in reverse), a tender back-up light, and a detailed boiler backhead with printed gauges. Front and rear engines pivot to negotiate 22" radius curves, with current pickup on all wheels and an upgraded loco-to-tender connection for enhanced reliability. Sound-equipped variants include an on-board DCC decoder with SoundTraxx Tsunami2, dual speakers, and full NMRA compatibility with CV-based customization (CV chart included). A front coupler pocket allows installation of an operating coupler, and the minimum recommended radius is 22 inches. Road-number options span #4000, #4003, #4019, #4020 and #4024, including Legendary Liveries finishes.