Athearn Genesis G1021 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3939 DCC/Sound E-Z Track and waterproof electronics - you

and waterproof electronics - you needn't worry about puddles or debris standing in your way

Roundhouse 1123 HO Scale Chemical Tank Car Hooker HOKX 1377

with an internal spring and dampener

Machined input pinion gear

Athearn Genesis G1021 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3939 DCC/Sound E-Z Track and waterproof electronics - youAthearn Genesis G1021 HO Scale 4 6 6 4 Challenger w Oil Tender Union Pacific UP 3939 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