BLI 7231 N Scale Big Boy 4-8-8-4 Steam Loco Union Pacific UP 4012 Paragon4 Era_2011 + New design 7075 aluminum front

New design 7075 aluminum front bulkhead to connect upper and lower arm

Designed for under-layout mounting

Rapido 169012 HO Scale AutoFlood III RD Coal Hopper "GATX" GGPX

Laydown Rear Shock Mounting Provides More Tuning Options

8" All-Star™ wheels

BLI 7231 N Scale Big Boy 4-8-8-4 Steam Loco Union Pacific UP 4012 Paragon4 Era_2011 + New design 7075 aluminum frontBLI 7231 N Scale Big Boy 4 8 8 4 Steam Loco Union Pacific UP 4012 Paragon4 Often called the largest steam loco ever made, and certainly a contender for the Worlds Most Famous Locomotive, the Big Boy was forged under some of the most strenuous demands ever placed on a locomotive. The UP Railroad needed a locomotive that could be used to pull a 3,600 ton train over Sherman Hill and the 1. 14% grade from Ogden to Wasatch, Utah without the need for