UP 4-8-8-4 #4024 - DCC & SOUND

UNION PACIFIC - BIG BOY
7239 UP Big Boy #4024, Two-Tone Gray w/ Yellow, Wilson Aftercooler, 25-C-400 Coal Tender, Paragon4 Sound/DC/DCC, Smoke, N (Fantasy Paint Scheme)

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 helpers.
When the design specifications were complete, it was decided on the use of a simple articulated, high speed, 132 ft. long locomotive sporting sixteen 68 diameter drive wheels. What they created was the longest and among the heaviest, most powerful steam locomotive legends in the world. And had not the worker at ALCO chalked Big Boy on the side of the smoke box of one of the 4-8-8-4s under construction, a name that immediately caught on, it is rumored that the name of the type would have been Wasatch, for the mountains they were built to conquer.

Industry-leading Model Features:

Paragon4 Sound & Control System featuring ROLLING THUNDER

Integral Dual-Mode Decoder with Back EMF for Superb Slow Speed Operation in DC and DCC

Precision Drive Mechanism Engineered for Heavy Towing and Smooth Slow Speed Operation

Operating Smoke Unit with On/Off Switch

Six Drivers and All Tender Wheels Pick-up Electricity from Track

Die Cast Locomotive Body with Die Cast Chassis for Heavier Weight and Maximum Tractive Effort

Rubber Tires on Two Drivers for Additional Tractive Effort

Premium Caliber Painting

Prototypically Accurate Paint Schemes and Road Numbers

Many Separately Applied Details such as Handrails, Grab Irons, Piping, Tender Ladders, Whistle, and Bell

Prototypical Headlight and Rear Light Operation

Separately Controllable Cab Light

Prototypically Accurate Sounds for the Union Pacific Big Boy

Operating Microtrains-compatible Couplers

Will Operate on Code 55, Code 70, and Code 80 Rail

Minimum Operating Radius: 9.75 inches