Athearn Genesis G1012 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3907 DCC/Sound Body - 10.5 WB Electro-Motive Division's F7 was the

Electro-Motive Division's F7 was the zenith of the “covered wagon

Tire Tread: Hoons™

Torque: 450oz @ 6v/ 500oz @7

Late production units (which are the prototypes for these models) had a shorter nose and some differences in the radiator intakes

Working Pyle-National "ash can" signal lights on front & rear

Athearn Genesis G1012 HO Scale 4-6-6-4 Challenger w/Coal Tender Union Pacific UP 3907 DCC/Sound Body - 10.5 WB Electro-Motive Division's F7 was theAthearn Genesis G1012 HO Scale 4 6 6 4 Challenger w Coal Tender Union Pacific UP 3907 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