HO 4-6-6-4 CSA-2 Challenger Locomotive with Tsunami2 DCC & Sound (ATHG-1022)

HO-scale CSA-2 Challenger 4-6-6-4 articulated locomotive with SoundTraxx Tsunami2 DCC sound is a detailed reproduction of ALCO’s giant Challenger, built for Union Pacific service in the 1930s. The coal-tender version, UP #3938, adds extra realism, while a tender-mounted DCC decoder and two cube speakers reproduce authentic chuff, whistle, and bell sounds in both DC and DCC operation.

On the layout, this model offers a host of prototypical details: illuminated number boards and headlights, a tender light that activates in the correct direction, and synchronized sound effects. The front and rear engine units pivot to negotiate tight HO curves, and current pickup runs on all driving wheels for smooth operation. With individually applied detail parts, a precise backhead, and NMRA-compliant DCC control, the model supports full function control and MU lashups; a 22-inch minimum radius keeps performance steady on typical home layouts.