30-1921-1 UNION PACIFIC BIG BOY #4005 W/ COAL TENDER-O QuickBooks 1 CTRL Port Plug (installed)

1 CTRL Port Plug (installed)

In the space of just 2 years

the Big Boys were just as impressive for their performance

Product Measurements: L 3

modelers can add a new level of realism to their railroads with a broad palette of prototypical sound effects and DCC functions

30-1921-1 UNION PACIFIC BIG BOY #4005 W/ COAL TENDER-O QuickBooks 1 CTRL Port Plug (installed)Just months before Pearl Harbor, the American Locomotive Company delivered the first Big Boy to the Union Pacific Railroad. The UP's Department of Research and Mechanical Standards had designed the locomotive for a specific task: to pull a 3600 ton train unassisted over the Wasatch Mountains in Utah. While the Big Boy is often cited as the biggest steam locomotive ever built, in fact it is not. The Norfolk & Western's Y6 and A, the Duluth Missabe &