BLI 7230 N Scale Big Boy 4-8-8-4 Steam Loco Union Pacific UP 4007 Paragon4 Nasa Currie F9 portal axle universals

Currie F9 portal axle universals (for front axle)

Repaints often vary by road number in the size and style of the reporting marks

LinkUp PTC antennas

This high quality

ScaleTrains 33101 Rivet HO Scale GE ES44 C45ACCTE GEVo Union Pacific UP 7956 DCC Sound

BLI 7230 N Scale Big Boy 4-8-8-4 Steam Loco Union Pacific UP 4007 Paragon4 Nasa Currie F9 portal axle universalsBLI 7230 N Scale Big Boy 4 8 8 4 Steam Loco Union Pacific UP 4007 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