The EMD DDA40X is a 6,600 hp (4,943 kW) D-D locomotive, built by EMD from 1969 to 1971 exclusively for the Union Pacific Railroad. [1] It is the most powerful diesel–electric locomotive …

Dec 16, 2024 · The DDA40X was an experimental, high-horsepower diesel locomotive designed by Electro-Motive for Union Pacific during the late 1960s. It received its classic nickname as …

The Electro Motive Division DDA40X (nicknamed "Centennial") is a 6,600 hp, twin-engine (consisting of two modified 3,300 hp 16-645E3A engines), eight-axle diesel locomotive built …

Union Pacific 6936 is an EMD DDA40X locomotive built for the Union Pacific Railroad (UP). Previously a part of UP's heritage fleet, 6936 was for several decades the last remaining …

May 5, 2022 · EMD DDA40X: In 1968, Union Pacific purchased 50 20-cylinder, 3,600 hp EMD SD45s for high-speed service. However, the units did not meet management’s expectations in …

Jan 15, 2003 · Weighing in at 270 tons, the DDA40X was labeled as 'The World's Largest and Most powerful Diesel Electric Locomotive'." All of the Centennial units were equipped to …

Apr 8, 2025 · This new locomotive was designated a DDA40X. The D designation means a truck (set of wheels) with 4 axles, the A means a unit with a cab, the 40 was the next good sounding …

The EMD DDA40X is a 6,600 hp (4,943 kW) D-D locomotive, built by EMD from 1969 to 1971 exclusively for the Union Pacific Railroad. It is the most powerful diesel-electric locomotive …

Based on the HP rating the DDA40X is the most powerful diesel locomotive ever built and coupled with the special introduction and the romance in the name "Centennial" it has become an icon …

Mar 16, 2020 · DDA40X •YEARS BUILT: 1969-1971 •MANUFACTURER: EMD •OPERATED ON: Union Pacific (special order from UP) •NAME: Centennial, named to mark the 100th …