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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 model ever built on a single frame, having two 16-645E3A diesel prime movers. [2]
0–9. Union Pacific No. 119; Union Pacific 618; Union Pacific 737; Union Pacific 844; Union Pacific 1243; Union Pacific 1982; Union Pacific heritage fleet
American Locomotive Company (ALCO) FEF-3 4-8-4 In storage as source of spare parts Union Pacific Railroad, Cheyenne, Wyoming: 844: December 1944 American Locomotive Company (ALCO) FEF-3 4-8-4 Operational Union Pacific Railroad, Cheyenne, Wyoming: 1242: T-57 4-6-0 Static display 1243: October 1890 T-57 4-6-0 Static display 2005: April 1911
Union Pacific 4455 0-6-0 1920 built Photographed at Colorado Railroad Museum in 2007. CO-23 Big Boy Union Pacific #4005: Steam 4-8-8-4 Forney Transportation Museum, Denver, CO One of the few remaining examples of the world's largest steam locomotives, a 4-8-8-4 type, of which only 25 were ever built, and eight remain in museums CO-24
Most powerful (continuous) single-frame locomotive in Europe. Union Pacific 9000 class: Union Pacific: 9000-9087 American Locomotive Company: 1926-1930 Steam 4-12-2: 355 tonnes (391 short tons) 97,664 pounds-force (434 kN) 4,750 horsepower (3,542 kW) — Union Pacific Coal GTELs: Union Pacific: 80 (later 8080) Union Pacific Omaha Shops 1961
Union Pacific 6936 is an EMD DDA40X locomotive built for the Union Pacific Railroad . Previously a part of UP's heritage fleet , 6936 was for several decades the last remaining operational "Centennial" type, and thus the largest operational diesel-electric locomotive in the world.
The ALCO Century 855 was a model of 5,500 hp (4,101 kW) diesel-electric locomotive built in 1964 by the American Locomotive Company for the Union Pacific.The locomotive was notable for being ALCO's most powerful diesel-electric locomotive and, at the time, the most powerful diesel locomotive ever built, [1] being surpassed by the 6,600-horsepower (4,922-kilowatt) EMD DDA40X in April 1969.
Southern Pacific Railroad; Union Pacific Railroad; March 26, 1997 Operational Golden Gate Railroad Museum in Schellville, California [1] Southern Pacific 5623 April 1955 Electro-Motive Division (EMD) GP9R Southern Pacific Railroad: 1991 Operational Niles Canyon Railway in Sunol, California "torpedo boat" version [2] Pennsylvania Railroad 7006 ...