{"product_id":"athearn-25745-n-scale-4-6-6-4-challenger-w-coal-tender-up-3997-dcc-sound","title":"Athearn 25745 N Scale 4-6-6-4 Challenger w\/Coal Tender UP 3997 DCC \u0026 Sound","description":"\u003ch1\u003eAthearn 25745 N Scale 4-6-6-4 Challenger w\/Coal Tender UP 3997 DCC \u0026amp; Sound\u003c\/h1\u003e\n\u003cp\u003eIn the spring of 1941 UP locomotive designers began working on a locomotive to team up with the new 4-8-8-4 Big Boy's then under construction at Alco. The Big Boy's were designed to pull heavy freights up the Wasatch Range in Utah to the division point at Green River, WY. What was needed was a locomotive to take over at that point that could speed the freights eastward across the Wyoming Division. Building on their experience with the original CSA 4-6-6-4 Challengers UP and Alco's designers developed a newer and better Challenger type locomotive. The result was a group of 65 4-6-6-4 Challenger built in three separate groups during World War II.\u003c\/p\u003e\n\u003cp\u003eThe name \"Challenger\" was given to steam locomotives with a 4-6-6-4 wheel arrangement. This means that they have four wheels in the leading pilot truck, which helps guide the locomotive into curves, two sets of six driving wheels, and finally four trailing wheels, which support the rear of the engine and its massive firebox. Each set of six driving wheels is driven by two steam cylinders. In essence, the result is two engines under one boiler. The Union Pacific Railroad sponsored development of this type to meet the need for higher speeds in main-line service. Historically, articulated locomotives had been limited to slow speeds by factors inherent in their design. The technical breakthroughs achieved with the Big Boy enabled the carrier to develop a newer, improved Challenger that met their speed expectations.\u003c\/p\u003e\n\u003cp\u003eThough originally intended for freight service, many Challengers were used in passenger service.\u003c\/p\u003e\n\u003cp\u003eFEATURES:\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eCoal Burner\u003c\/li\u003e\n\u003cli\u003eDual smoke stack\u003c\/li\u003e\n\u003cli\u003eTender bunker coal extensions\u003c\/li\u003e\n\u003cli\u003eEra 1940's - 1959\u003c\/li\u003e\n\u003cli\u003eDCC-ready features Quick Plug™ plug-and-play technology\u003c\/li\u003e\n\u003cli\u003eScaled from prototype resources including drawings, field measurements, photographs, and more\u003c\/li\u003e\n\u003cli\u003eAccurately-painted and –printed paint schemes\u003c\/li\u003e\n\u003cli\u003eFull cab interior with boiler backhead with printed gauges\u003c\/li\u003e\n\u003cli\u003eIndividually applied piping, valves, generators, etc.\u003c\/li\u003e\n\u003cli\u003eOperating eccentric cranks on both sides operating in correct direction\u003c\/li\u003e\n\u003cli\u003eHeadlights and indicator number boxes (number boards) with directional light change\u003c\/li\u003e\n\u003cli\u003eFive pole, skewed armature motor with flywheel for smooth operation\u003c\/li\u003e\n\u003cli\u003ePivoting front and rear engines for negotiating 11\" radius curves\u003c\/li\u003e\n\u003cli\u003eSee-through running boards\u003c\/li\u003e\n\u003cli\u003eSee-through cab windows\u003c\/li\u003e\n\u003cli\u003eMcHenry® scale knuckle couplers\u003c\/li\u003e\n\u003cli\u003eLED Lighting for realistic appearance\u003c\/li\u003e\n\u003cli\u003eFully-assembled and ready-to-run\u003c\/li\u003e\n\u003cli\u003eHeavy die-cast frame for greater traction and more pulling power\u003c\/li\u003e\n\u003cli\u003ePackaging securely holds for the model for safe storage\u003c\/li\u003e\n\u003cli\u003eMinimum recommended radius: 15\"\u003c\/li\u003e\n\u003cli\u003eSOUND EQUIPPED MODELS ALSO FEATURE:\u003c\/li\u003e\n\u003cul\u003e\n\u003cli\u003eTender-mounted DCC decoder with SoundTraxx Tsunami2 sound\u003c\/li\u003e\n\u003cli\u003eSound, units operate in both DC and DCC\u003c\/li\u003e\n\u003cli\u003eFull DCC functions available when operated in DCC mode\u003c\/li\u003e\n\u003cli\u003eEngine, whistle, and bell sounds work in DC\u003c\/li\u003e\n\u003cli\u003eAll functions NMRA compatible in DCC mode\u003c\/li\u003e\n\u003cli\u003eExcellent Slow speed control\u003c\/li\u003e\n\u003cli\u003eMany functions can be altered via Configuration Value (CV) changes\u003c\/li\u003e\n\u003cli\u003eCV chart included in the box\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/ul\u003e","brand":"Athearn","offers":[{"title":"Default Title","offer_id":45537564066005,"sku":"ATH25745","price":399.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0520\/1972\/4454\/files\/athearn-25745-n-scale-4-6-6-4-challenger-w-coal-tender-up-3997-dcc-sound.jpg?v=1704748360","url":"https:\/\/www.whiterosehobbies.com\/products\/athearn-25745-n-scale-4-6-6-4-challenger-w-coal-tender-up-3997-dcc-sound","provider":"White Rose Hobbies","version":"1.0","type":"link"}