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[quote]QUOTE: Originally posted by n2mopac But what physical difference distinguishes an SD70MAC from an SD90MAC.[/quote] SD70MAC's are smaller. [quote]QUOTE: I know some of these EMD AC units have flared radiators and some do not. Which ones do and which ones do not? [/quote] SD70ACe's, SD70M-2's, SD80MAC's, SD90MAC's, SD90MAC-H's, and later model (2002-2004) SD70M's and SD70MAC's. [quote]QUOTE: Also, is there a distinguishing difference between GE's AC4400CW and AC6000CW?[/quote] The radiators on the AC6000 are larger [quote]QUOTE: Finally, when did these units first appear in revenue service (SD70, SD70MAC, SD90MAC, AC4400CW, AC6000CW)?[/quote] I'm not 100% sure, but I'd say 1994, 1994, 1996, 1994, and 1997. [quote]QUOTE: Finally, is there a DC version of the SD90? [/quote] Nope. [quote]QUOTE: Thanks for your help. [/quote] No problem! [:)]
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