Athearn Genesis G1012 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3907 DCC/Sound Body - 10.5 WB (4) Rock Crawler Wheels &

(4) Rock Crawler Wheels & Tires

The IC cars feature their as-built 1970 appearance that includes Gypsum crossover platforms

Tire Tread: Hoons™

Late production units (which are the prototypes for these models) had a shorter nose and some differences in the radiator intakes

Corner Posts: A special limited run of the Grand Trunk Western cars without the corner posts will be available

Athearn Genesis G1012 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3907 DCC/Sound Body - 10.5 WB (4) Rock Crawler Wheels &Athearn Genesis G1012 HO Scale 4 6 6 4 Challenger w Coal Tender Union Pacific UP 3907 DCC Sound ALCO constructed the first 4 6 6 4 locomotives in the world, numbered 3900 to 3914, for the Union Pacific Railroad in 1936. These huge engines were named the Challenger Simple Articulated, or CSA 1, class. The railroad received 25 near copies, classified as CSA 2, the following year. Unlike compound Mallet engines that crawled along with drag freights, the