Heavy goods train locomotive series 4000 Big Boy from the Union Pacific Railroad (UP). Design of the locomotive with the operating number 4013. Operating condition circa 1950.With digital decoder and a wide range of sound features. Regulated high-power drive. 8 powered axles. Traction tires, smoke generator. Head end signal changes dependent upon the direction of travel and smoke generator operated conventionally, can be switched digitally. Driver's cab lighting is digitally switchable Lighting with maintenance-free warm white light emitting diodes (LED). Curve-going articulated chassis. Boxpok wheels. Minimum radius R2a (261.8 mm). Length over couplings approx. 25.3 cm.Notes on operation: The locomotive can be used on curved tracks from a radius of 261.8 mm, but we recommend larger radii. Due to the overhang of the long vessel, signals, overhead line masts, bridge railings, tunnel portals, etc. must maintain a sufficient distance to the track bend. For the high weight of the locomotive, the track must be stable. The turntable and sliding platform can only be driven in the forward position.This text is machine translated.