BLI 7058 HO Scale 4 8 8 4 Big Big Boy Steam Locomotive Pacific Promitory UP 4014 Paragon4 Era_2016 + Rapido 033020 HO Scale MLW Rapido 033020 HO Scale MLW M420 MR 20b Diesel Canadian National North American CN 3536 doors and an engine hood that open(s) as well as a realistic imitation of the original steering which is provided by an additional steering rod that is guided through the roof of the tractor Several examples remain in museums around the country but silently they sit as a visual echo to the thunder that once made them revered throughout the landscape that the Big Boys dominated Accurate Prototypical Sounds for the Union Pacific Big Boys