for it ever to be considered it will have to wait until those familiar with the problems with the DD40 are retired and some real noobs get high enough to make such a poor decision. In retrospective, the DD (DDA40X, DD35, et al) were a failure. Mostly for reasons that Pat mentioned: inflexibility, high fixed costs and lack of volume/scale. A totally unique engine with limited flexibility is a dead horse for a modern railroad.
I wouldn't hold my breath....
They accomplished a lot in a short time frame.
Heck with the new SD's, I'm still waiting for EMD to catch up on the GP's!!! Where are the GP70's, 75's, 80's, and 90's?????
There is a big difference between an Engineering success (it was, altho shortlived) and a Business success (it wasn't ever).
Bottomline is that if they had been a true success, Engr + Business, they would have ordered more of a similar nature, or at least evolved the concept further. They didn't do either and the replacements were no-frills, single PM SD40-2 for tonnage or GP40 for speed. Both of which are still in Class 1 usage 30+ years later and major investments are being made to continue their life even further. That's success. Even when the SD40-2 was being phased out of primary usage, the replacement SD70 was based on the concept of the SD40-2 (no-frills, single PM).
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