BLI 10606 HO Scale Big Boy 4-8-8-4 UP 4010 with As-Delivered Aftercooler 1941 Paragon4 DCC Scale Figure Lasting in production until the

Lasting in production until the early 1980s

Intelligent torque output & speed closed-loop control for easy control

(1) Negative Heat Shrink Tube

Utilizing a large hollow design and self-dissipating structure

BLI 10606 HO Scale Big Boy 4-8-8-4 UP 4010 with As-Delivered Aftercooler 1941 Paragon4 DCC Scale Figure Lasting in production until theBLI 10606 HO Scale Big Boy 4 8 8 4 UP 4010 with As Delivered Aftercooler 1941 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