Model Number: 6-85003

Features include: opening hatches

Model Number: 20-3246-1

Trainz Product Id: 12110325

Marklin 37996 Digital HO Scale Union Pacific 4-8-8-4 Big Boy Steam Loco & Tender DwDetails-3.90-1.65-18.00-8.00-6.00-1 Model Number: 6-85003Prototype: Union Pacific Railroad (UP) class 4000 Big Boy heavy freight locomotive. Version with the road number 4020. The locomotive looks as it did around 1950. Model: The locomotive has an mfx+ digital decoder and extensive sound functions. It also has controlled high efficiency propulsion. 8 axles powered. Traction tires. The locomotive has an articulated frame enabling it to negotiate sharp curves. It also has Boxpok driving wheels. The middle