Athearn Genesis G1015 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3938 DC TRRA Athearn RTR 74040 HO Scale

Athearn RTR 74040 HO Scale Concession Cupola Caboose Set Iron Horse Hot Dogs

Check out those distinctive roof vents added during rebuilding but the original SLCC “taller” style smokejack

Engine hood opens

Athearn 18020 N Scale 30

Early inertial air intake grilles without drip rails

Athearn Genesis G1015 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3938 DC TRRA Athearn RTR 74040 HO ScaleAthearn Genesis G1015 HO Scale 4 6 6 4 Challenger w Coal Tender Union Pacific UP 3938 DC 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