BLI 10609 HO Scale Big Boy 4-8-8-4 UP 4016 with As-Delivered Aftercooler 1941 Stealth DC Era_1973-1991 Low Resistance - High Efficiency:

Low Resistance - High Efficiency: Resistance is reduced by 11%

and a choice of left- or right-hand drive exteriors

6061-T6 aluminum (green-anodized)

Operating Doors

BLI 10609 HO Scale Big Boy 4-8-8-4 UP 4016 with As-Delivered Aftercooler 1941 Stealth DC Era_1973-1991 Low Resistance - High Efficiency:BLI 10609 HO Scale Big Boy 4 8 8 4 UP 4016 with As Delivered Aftercooler 1941 Stealth DC 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