BLI 10604 HO Scale Big Boy 4-8-8-4 UP 4014 with Smoke Deflectors 2025 Paragon4 DCC ShiftServos A key design feature of

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BLI 10604 HO Scale Big Boy 4-8-8-4 UP 4014 with Smoke Deflectors 2025 Paragon4 DCC ShiftServos A key design feature ofBLI 10604 HO Scale Big Boy 4 8 8 4 UP 4014 with Smoke Deflectors 2025 Paragon4 DCC When railfans think of big steam, one locomotive almost always comes to mind: the Big Boy. Often regarded as the largest steam locomotive ever builtand certainly a contender for the world's most famous locomotivethe Big Boy was created to meet some of the most demanding operating requirements ever placed on a steam engine. The Union Pacific Railroad needed a locomotive