BLI 9915 HO Scale UP CSA-2 Early Challenger Union Pacific 3831 2-Tone Fantasy Scheme Paragon4 Hybrid Clear Body - X-Maxx and a machined piston secured

and a machined piston secured by an 2mm screw for smooth

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Rapido Trains 52506 HO Scale GE E44a Electric Pennsylvania PRR 4465 - DCC & Sound

From the TRX 3

Five hole wheel unless noted

BLI 9915 HO Scale UP CSA-2 Early Challenger Union Pacific 3831 2-Tone Fantasy Scheme Paragon4 Hybrid Clear Body - X-Maxx and a machined piston securedBLI 9915 HO Scale UP CSA 2 Early Challenger Union Pacific 3831 2 Tone Fantasy Scheme Paragon4 Hybrid The Union Pacific Challengers were a class of powerful, simple articulated 4 6 6 4 steam locomotives built by the American Locomotive Company (ALCO) exclusively for the Union Pacific Railroad. Between 1936 and 1943, a total of 105 were constructed. Measuring an impressive 122 feet (37 m) in length and weighing 628,000 pounds (284,800 kg), these