Guaranteed Pre-Order Deadline is September 17th, 2026
After closing, you may still place a pre-order and we will attempt to acquire one for you.
Estimated Delivery Date Is: Early 2027
Product Information:
10604 UP Big Boy 4-8-8-4, #4014, 2025 Appearance w/ Smoke Deflectors, Paragon4 Sound/DC/DCC, Smoke, HO
When railfans think of “big steam,” one locomotive almost always comes to mind: the Big Boy.
The World's Most Famous Steam Locomotive
Often regarded as the largest steam locomotive ever built—and certainly a contender for the world's most famous locomotive—the Big Boy was created to meet some of the most demanding operating requirements ever placed on a steam engine. The Union Pacific Railroad needed a locomotive capable of hauling a 3,600-ton train over Sherman Hill and the 1.14% grade between Ogden and Wasatch, Utah, without the assistance of helper locomotives.
Industry-leading Model Features
- ALL-NEW Paragon4 Sound & Control System
- Synchronized Puffing Smoke with Chuff Sound
- Variable Puffing Smoke Intensity and timing
- Separate Whistle Smoke Feature - smoke streams from whistle area when whistle is blown
- Integral DCC Decoder with Back EMF for Industry Best Slow Speed Operation in DC and DCC
- Precision Drive Mechanism engineered for continuous heavy load towing and smooth slow speed operation
- 5-Pole Can Motor with Skew Wound Armature
- Heavy Die Cast Boiler, Tender Body, and Chassis for Increased Tractive Effort
- Premium Caliber Painting with Authentic Paint Scheme
- Prototypical Light Operation with Separately Controllable Headlight, Reverse Light, Cab Light, Front Numberboards, Front Marker Lights, Rear Marker Lights
- Factory-installed Engineer and Fireman Figures
- Optional Smoke Hood can be Installed if Desired
- Optional Operating Front Coupler Included in Box
- Prototypically Accurate Details for Each Road Number
- Two After-cooler variations - As-Delivered for the Class-1 and Wilson Aftercooler for the Class-2 models
- Three Accurately Modeled Tender Variations: 25-C-100 for the Class-1 models, 25-C-400 for the Class-2 models, and the appropriate Challenger #3985 tender for the #4014 Excursion Service models
- Many Separately Applied Details such as Handrails, Ladders, Piping, Cab Glass, Whistle, Brass Bell, Markers, Numberboards, Air Tanks, and Many Others
- Equipped with Rubber Traction Tires for Increased Pulling Power
- Recommended Minimum Radius: 18 inches
- Accurate Prototypical Sounds for the Union Pacific Big Boys
- Locomotive Weight: 2 lbs 15.5 oz
- Tender Weight: 15.5 oz
- Coupler to Coupler Length: 19 inches
- Wheelbase: 16.5 inches