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 …

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 …

The Centennials were the largest diesel-electric locomotives ever built. Actually comprising two engines on one frame, they delivered 6,600 horsepower. Designed and built exclusively for …

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 …

Nov 18, 2024 · 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 …

Union Pacific (UP) #6936 is a DD40X built in January of 1971 in an order of 47 units numbered 6900-6946 and classified as the largest diesel locomotives ever built. They were nicknamed …

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 …

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 …

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 …

In 1969 UP purchased the very largest and most powerful diesel ever built, the DDA40X, with 6600 HP provided by two diesel engines (prime movers) mounted on one frame,