Märklin 039913 — US Challenger Steam Loco, UP

Description

Märklin 039913 — US Challenger Steam Loco, UP

The Union Pacific Railroad’s 4-6-6-4 Challenger class represents a pinnacle of American articulated steam locomotive design. Developed in the mid-1930s by the American Locomotive Company (ALCO) under the direction of UP’s research department, these locomotives were engineered for high-speed freight service across the demanding grades of the Wasatch Mountains and Sherman Hill. Operating primarily during Era III, the Challenger utilized a Mallet-style articulated frame that allowed the massive boiler to traverse tight curves while distributing its immense weight across twelve driving wheels. This design offered a versatile balance of tractive effort and speed, making it one of the most successful heavy-power steam designs in North American railroading history.

This Märklin H0 scale model (SKU 039913) features a heavy-duty chassis and boiler constructed primarily of die-cast metal for superior traction and durability. The locomotive is equipped with an mfx+ digital decoder, providing a vast array of synchronized sound functions and advanced operating modes compatible with the Central Station 3 system. The articulated frame is specifically engineered to negotiate curves as tight as the R1 radius (360 mm). Interior technical highlights include a high-efficiency propulsion system with a flywheel, drive on six axles, and factory-installed traction tires. The model features LED directional lighting, a smoke generator contact for retrofitting, and NEM coupler pockets with a close-coupling mechanism between the engine and the multi-axle tender.

Product Specifications:

• Manufacturer: Märklin
• Item Number: 039913