The AC6000CW was the culmination of GE's efforts in the horsepower race of the 1990s, featuring a GE 7HDL16 prime mover rated at 6,000hp. This made the new locomotives only slightly less powerful than the EMD DDA40X double diesels of two decades previous, but the new powerplants were far from reliable, and some Union Pacific units were built with the less powerful 7FDLs.
CSX bought the first production AC6000CWs, and for a time derated their engines (via software limits) to improve reliability; they have since been brought back up to their original rating, save for a single FDL-engined example. CSX 5012 is seen here leading an earlier 600-series unit eastbound towards Pittsburgh in 2005.
HO RTR AC4400
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