Athearn Genesis G1027 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3939 DC NYS&W High-quality CNC machined aluminum 24mm

High-quality CNC machined aluminum 24mm wheel wrench included

It's part of the Cornerstone Engineered Bridge System and is designed to be compatible with system abutments and bridge piers

operational flaps and more

cooler air to enter and less hot exhaust fumes lingering around the tunnel’s ceiling

12-cylinder turbocharged units were used system wide in all types of service

Athearn Genesis G1027 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3939 DC NYS&W High-quality CNC machined aluminum 24mmAthearn Genesis G1027 HO Scale 4 6 6 4 Challenger w Oil Tender Union Pacific UP 3939 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