HO 4-6-6-4 Challenger Steam Locomotive with DCC & Sound UP #3933 (ATHG98972)

Union Pacific HO-scale 4-6-6-4 Challenger Steam Locomotive with DCC & Sound is a detailed model for HO-layout enthusiasts, designed to bring UP’s iconic Challenger class to life with authentic sound and operation. This version features a tender-mounted DCC decoder with SoundTraxx Tsunami2 sound, delivering synchronized chuff, whistle, bell, and more, and it runs on both DC and DCC power for flexible control.

Realistic detailing includes illuminated number boards and headlights, a see-through firebox with flicker, and a boiler backhead with printed gauges. It uses dual cube speakers for rich sound and features a pivoting front and rear engine arrangement to handle curves on HO track. A durable loco-to-tender connection and current pickup on all driving wheels ensure reliable operation, while era-appropriate touches such as coal burner, dual smokestacks, and tender coal extensions evoke UP's 1940s–1950s era. Minimum recommended radius is 22 inches.