ShortlinesUSA wrote:The MACs are coming to Derby for rebuild. Will not leave as scrap. Any info past that is mum, as part of a proprietary deal.That deal fell through, I take it...?
MEC407 wrote:I've heard (and seen video) that the SD90MACs had/have a pretty bad problem with "hunting" -- side-to-side motion when operating at normal track speeds. For whatever reason, this doesn't seem to be nearly as much of a problem with the other Big Macs (70 series and 80 series). I'm not sure if it's a problem at lower speeds (less than 40).I have seen this on the 90's that we have here on the VTR, I use a term to describe it taken from the Volkswagen community, the "Death Wobble". When the engines are pulling, and/or on welded rail. it doesn't seem to be very noticeable. However, on bolted rail if the engines are coasting, or not pulling hard it can become quite pronounced. The CEFX 130 was quite bad in this respect, one of the hardest riding engines I have ever operated actually. The 125 is a close second. The 105 seems to be the better riding unit of the three. I haven't had a chance to get it up to 40 yet, but at 25 on bolted rail it rides and tracks fine.
Jack Donaghy wrote:I'm already not liking some of these people, reminds me of being on the bus