This Minitrix N Scale 4-8-8-4 Big Boy from Trix is based on the famous huge steam locomotives used on Union Pacific from the 1940s into the early 1960s. This detailed model features a coal tender as used in service and is decorated for its 1950′s appearance. The locomotive has a DCC digital decoder and extensive sound functions. It also has controlled high-efficiency propulsion and eight powered Boxpok drivers. Other features include traction tires, a smoke unit and directional headlights which operate in both analog and DCC operation. Cab lighting can be controlled digitally. Maintenance-free, warm white LEDs are used for the lighting. The locomotive has articulated running gear to allow operation on smaller curves. This locomotive can be used on curved track with a minimum radius of 10-5/16′ 261.8 mm, but larger radius curves are recommended. Due to the overhang of the long boiler, signals, catenary masts, bridge railings, tunnel portals, etc. must be mounted to provide sufficient clearance on curves. This model comes equipped with a Rapido-style coupler on the rear of the tender. The track must be well mounted for the high weight of the locomotive. The 4-8-8-4 Big Boy is part of the extensive line of Trix Minitrix N Scale locomotives.