The EMD DD35 was a 5000 horsepower (3700 kW) diesel-electric locomotive of D-D wheel arrangement built by General Motors Electro-Motive Division for the Union Pacific Railroad and Southern Pacific Railroad. In the early 1960s Union Pacific started asking for a 15000 hp (11200 kW) 3-unit locomotive set to not only replace their turbine locomotives but to bring new generation of diesel locomotives to the states and then put them into use.
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