N GEN 4-8-8-4 Big Boy Locomotive UP 4000 (ATHG-2245)

Genesis 4-8-8-4 Big Boy Steam Locomotive, UP 4000, is a meticulously detailed model that faithfully recreates Union Pacific’s legendary Big Boy with its 4-8-8-4 wheel arrangement. It captures the locomotive’s monumental size, power, and iconic silhouette, including 68-inch drivers and 6,000 horsepower, making it a dramatic centerpiece for layouts that handle heavy freight over long grades. Ready to run and built around a heavy die-cast frame, this model pairs rugged construction with authentic detailing for both display and operation on serious railroads.

Inside, the model hides a wealth of authentic features: boiler backhead detailing with printed gauges, individually applied piping and valves, and operating eccentric cranks; directional headlights that change with direction; see-through running boards and cab windows; and a robust drive with a five-pole motor, precision flywheels, and a multi-link drivetrain for smooth, powerful operation. It uses body-mounted scale knuckle couplers and requires a minimum 11-inch radius to navigate curves on larger layouts. Road-number variations cover delivered and in-service grime finishes, with Legendary Liveries offering iconic schemes; some paint schemes reflect alternative road names such as ATSF, SOU, and NdeM. For layout versatility, the model supports both DC and DCC operation, with optional onboard Tsunami2 sound, full DCC functionality, and CV-based tuning for MU lashups and other custom setups.