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Amtrak puts out RFP for new and rebuilt locomotives.

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[quote user="YoHo1975"]Interesting. I wonder, If new, would After treatment be usable for the long distance fleet? and so Chargers and F125s?[/quote] Amtrak would have to refill 130 gal at each tank stop. How many refueling stations does Amtrak have and what would the DEF infrastructure cost? [quote user="YoHo1975"]Or are they going to need to go with one of the heavier freight designs?[/quote] I have doubts that Amtrak ever again will accept 6-axle trucks. Perhaps it gets the hour of an updated MPI HSP46AC. But the Tier 3 locomotive already weighs 290,000 lbs and it needs a larger fuel tank and the about 8,000 lbs heavier Tier 4 Gevo engine. Depending on top speed it might need different trucks. A monocoque design could provide weight savings of about 20,000 lbs. [quote user="YoHo1975"] Rebuilds might make more sense. plenty of other FDL powered units are going under the knife now adays. Not sure what level of emissions they could meet.[/quote] The P42DC were build with a Tier 0 engine. Tier 1 would be available. GE developed the Gevo for Tier 2 as they feared a 7FDL-16 would consumate too much fuel and would possibly need exhaust aftertreatment. I don't know of any Tier 2 retrofit kit. Rebuilding to AC shouldn't be a problem but all components weigh. A retrofit with a Gevo Tier 2, perhaps Tier 3 might be possible. Tier 4 would be too heavy for the P42DC's monocoque, I think. I hope the P42DC already have corner posts. These were not required in 1993 and I'm not sure if they were required in the AAR S-580-1994 crashworthiness standard. I think they wouldn't be easily put into a monocoque. And with all these possible changes one has to look at the ratio of new to re-used parts. Has the locomotive more than 50% new parts by worth after rebuild it is called refurbished and a Tier 4 engine would be necessary. If I had to renew Amtrak I would go for new locomotives. But as long as we don't know the specification we only can speculate. Regards, Volker
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