Athearn Genesis G1022 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3938 DCC/Sound SCT410 Starting in the mid 1950’s

Starting in the mid 1950’s the AAR design was adapted to create a plug door

Detailed Custom Numbered

Mount your new body onto your Crawler

or you can mount the vertical side pins to the outside for more forgiving grip

Athearn Genesis G1022 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3938 DCC/Sound SCT410 Starting in the mid 1950’sAthearn 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