Prototype: Heavy US freight steam locomotive Class 3900 "Challenger" of the Union Pacific Railroad (UP) with coal tender. Locomotive operating number 3969. Operational condition from the 1950s.

Model: Equipped with digital decoder and extensive sound functions. Regulated high-performance drive. 8 powered axles. Traction tires, smoke generator. Direction-dependent alternating front signal, number plates, and smoke generator conventionally operable, digitally switchable. Cab lighting digitally switchable. Lighting with maintenance-free warm white LEDs. Curved joint chassis. Boxpok wheels. Minimum radius R2a (261.8 mm). Length over couplings approximately 23 cm.

This model is created in collaboration with Broadway Limited Imports.

The image is a digital retouch. Operating notes: The locomotive can be used on curved tracks from a radius of 261.8 mm, but larger radii are recommended. Due to the overhang of the long boiler, signals, overhead line masts, bridge railings, tunnel portals, etc., must maintain a sufficient distance from the track curve. The track must be securely fixed due to the high weight of the locomotive. Turntables and traversers can only be operated in through position.