Athearn Genesis G1022 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3938 DCC/Sound Mad Van with many modifications updating the

with many modifications updating the state of the art in electronics

Pro style front sway bar set for the F1 Ultra

optional heavy duty sway bar

meaning that home road rules did not apply

Athearn Genesis G1022 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3938 DCC/Sound Mad Van with many modifications updating theAthearn Genesis G1022 HO Scale 4 6 6 4 Challenger w Coal Tender Union Pacific UP 3938 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