Originally Posted by Dieselbob:
The railroads could buy new four axle power any time they want to IF they were willing to pay the NEW price for locomotives that generally don't get very good utilization. They have decided instead to spend their money buying six axle units that bring a higher return on investment. In the case of Norfolk Southern, they feel they have more than enough four axle units on the property to meet their present and future needs to the point that they sold off the 80 perfectly good 5500 series GP38-2 rebuilds recently. (correction, they did not renew the lease) NS will simply keep rebuilding the remaining GP38/40/50/59/60 units they still have as needed to fill their needs. These ECO units are likely ONLY being done because they got the government to pay for a large chunk of the project. Otherwise, these units would likely have been rebuilt similar to NS's other GP rebuilds. One more point about "NEW" four axles. The GP ECO units that EMD have done for Canadian Pacific contain so many NEW parts (including frame) that they are "rebuilds' in name ONLY, just enough to meet the legal requirements for such. As for what this purchasing strategy has done to the second hand four axle unit market, why should the Class One railroads care about that?
I believe that BNSF with ET/ES44C4's are pretty much doing just that. Reading comments about how daylight can be seen under the middle wheel sets essentially makes them B-B units rather than AIA-AIA. My understanding with new B-B units is that all the stuff can't be fit in and get the weight down to below restrictions.
I do not quite understand the comments on the flared radiator section. Zero units have been designed by Lionel and MTH. However, MTH makes a SD45 with a similar flared radiator section. Technically, a flared radiator section is no more difficult to tool up for than any other type of body. Also, both MTH and Lionel make a SD70ACe with flared radiator sections just fine as well as a wide variety of GE units just fine.
Perhaps the argument is that such a unit cannot be done profitably. However, if "Santa Fe" can be plastered onto the side such tooling immediately becomes profitable. Sorry, "Santa Fe" sells.
Check out these comments from Trainworld at 2:07 concerning the Santa Fe ES44AC's (which have flared radiators) from Lionel's Catalog:
https://www.youtube.com/watch?v=abFBCOi_ATg