Athearn Genesis G1021 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3939 DCC/Sound Meridian & Bigbee Extended Heavy Duty Steel Ladder

Extended Heavy Duty Steel Ladder Frame

3/8 x 1/4 - 2

88 freight cars (including 34 cabins)

Traxxas 1952G Green Alumnium Read Stub Axle Carriers for Slash 4x4 and Others

Use straight-rod option to cut in tight places and for faster cuts

Athearn Genesis G1021 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3939 DCC/Sound Meridian & Bigbee Extended Heavy Duty Steel LadderAthearn 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