Athearn Genesis G1021 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3939 DCC/Sound Meridian & Bigbee Phase 1 or 2 sill/chassis

Phase 1 or 2 sill/chassis used where appropriate

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

Long antenna for better range and reception

Use for early Spring bushes

Athearn Genesis G1021 HO Scale 4-6-6-4 Challenger w/Oil Tender Union Pacific UP 3939 DCC/Sound Meridian & Bigbee Phase 1 or 2 sill/chassisAthearn 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