by thecanadianrail » Mon Jan 17, 2011 6:04 pm
ok, what would be different on the SD70I compared to the SD70M. well notice the line on the side of the nose that runs over the whole nose, that is the VISIABLE isolation. the other isolation spots are not visable on the outside. i got this from Wic:
"The SD70I is a version of the SD70M which has been fitted with a cab that is isolated from the frame of the locomotive with rubber gaskets (officially known as a "WhisperCab"). The isolation reduces noise and vibration from the prime mover. A seam is visible across the nose and on the long hood where the cab connects with the body. 26 examples of this model locomotive were produced, all for Canadian National. The WhisperCab feature was incorporated into some SD70MAC and later models. Numbers: CN 5600-5625"
ok, i guess i was wrong, only CN had them. just search "EMD SD70 series" on wicipedia to get info on all SD70's. it also has a table of contents on who bought what kind of SD70 and how many!