{"product_id":"athg-1021","title":"HO 4-6-6-4 CSA-2 Challenger Locomotive with Tsunami2 DCC \u0026 Sound UP #3939 (ATHG-1021)","description":"\u003cdiv class=\"product_description\"\u003e\n\t\u003cp\u003eAn HO-scale 4-6-6-4 CSA-2 Challenger locomotive modeled after Union Pacific’s famous Challengers, UP 3939. This large articulated steam locomotive is equipped with a tender-mounted DCC decoder and SoundTrax Tsunami2 sound, delivering authentic chuffing, whistles and other locomotive audio for operation on DCC-equipped layouts.\u003c\/p\u003e\n\t\u003cp\u003eIlluminated number boards and headlights light the model, with the headlight turning off when running in reverse and a tender-mounted back-up light for added realism. The Tsunami2 sound suite provides synchronized chuff, whistle, bell, blow-down, air compressor, dyno and pop-off valve effects, plus a range of user-controlled sounds, all carried through dual cube speakers for clear, room-filling audio. The model runs on both DC and DCC and offers full DCC functions with NMRA compatibility, including options to program a multi-unit lashup. It features pivoting front and rear engines to negotiate 18-inch radius curves, current pickup on all wheels, a detailed boiler backhead with printed gauges, and a robust loco-to-tender harness for durability. A minimum recommended layout radius of 22 inches ensures smooth operation, and there is an oil-tender variant that reproduces the UP Challenger’s oil-burning configuration.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"Athearn Genesis (ATHG)","offers":[{"title":"Default Title","offer_id":47610621263924,"sku":"ATHG-1021","price":629.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0597\/6653\/8292\/files\/ATHG-1021.jpg?v=1774302805","url":"https:\/\/nankinhobby.com\/products\/athg-1021","provider":"Nankin Hobby","version":"1.0","type":"link"}