MTH - Premier Diesel Locomotives (Hi-Rail Wheels) - DD40AX - O Scale 3 Rail

For much of the twentieth century, the Union Pacific had a love affair with massive, larger-than-life locomotives, custom-built for the UP and rostered nowhere else. The family line that began with the Union Pacific-type 4-12-2 steamer (shown elsewhere in this catalog) and continued with the Challenger, Big Boy, and gas turbines ended with the DDA40X Centennials. Built by the Electro-Motive Division of General Motors in 1969-71, the Centennials are still the longest (98') and most powerful (6600hp) diesels ever built in the western hemisphere, and the last unique UP motive power. For the decade of the 1970s, they ruled the road from the Midwest to the west coast, hustling UP fast freights at up to 90mph.