Prototype: Union Pacific (UP) Heavy Freight Locomotive. This is a reproduction of the locomotive No. 4012 from about 1960. The 4000 is considered the largest steam-locomotive in the world.
Model: Comes with a load-regulated Digital-Decoder, high-performance engine, sound-generator and many additional auxiliary functions. High-performance-motor with bell-shaped armature is located in the boiler! There are 8 powered axles. 4 traction-tires. Articulated-undercarriage. Boxpok Wheels. Middle dome-axles sprung. Head-lamp, Tender lamp and number-boards with maintenance-free LED, all of which are controlled digitally. Comes with 2 smoke-stacks (Seuthe No. 11 or Marklin 7226 can be added); for instant smoke effects. Headlights, number-boards - and cab-illumination will operate conventionally or can be digitally controlled. Speed dependent steam-locomotive-sound, bells, whistle, brake-squeals as well as acceleration/braking delay can be controlled with Control Unit 6021 or with mobile station 60652 Mobile Station. With the NEW Central Station 60212, additional sounds such as the air-pump, the valves and the injector, the auxiliary blower, the rail-joints, the compressed air brakes, the cab-radio and in addition, even the sound of the original-claw-clutch when coupling can be accessed. The locomotive tender contains an efficient loudspeaker and the volume is adjustable. Front-end coupler can be inserted and in addition, adjustable close-coupling between locomotive and tender. Adjustable steam pipes can be added to the cylinders. All hand-rails made from metal. Many separately applied details. Figures or the engineer and stoker for the cab are enclosed. Length over buffers 46.5 cm. The 25 machines of the 4000 class is considered the largest ever built-series steam-locomotives in the world. The official name �Big Boy� sounds quite modest in contrast to the locomotive. That approximately 40 m long giants brought a performance of over 6.200 HORSE POWER with four gigantic cylinders. Especially imposing was the sound effects, that such a monster created. Marklin brings the typical sound of the big steam-locos in this H0-Model with the new faithfully reproduced sound-effects as well as many of the background sounds, all individually controlled. The full scope of the acoustic functions is available with the 60212 Central station from the M�rklin Systems Program. Operational Tips: This locomotive is capable of operating on radius 360 mm, however Marklin recommends operation on wider curved radiuses. Due to the overhang of the long boiler, signals, catenary-masts, bridge-hand-rails, tunnel-portals etc. should have sufficient spacing from the track. The track must also be fastened securely due to the high weight of the locomotive. The locomotive can be used on turntable and transfer tables, but only for the purpose of passing over. The locomotive 37991 as described above is being manufactured in an unique one-time series only for Insider-members only.
