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Re: De-rating Locomotives
Author: almo
Date: 07-31-2007 - 22:03

How does a unit get a horsepower de-rating?

I know that most of UP's SD-38 switchers were SD-40's, and had the turbocharger removed. Essentially, the only difference between the two models horsepower-wise is the turbocharger. Is this the only way to lower the horsepower?

The SD-45 models have been reconfigured to a lower horsepower in many cases. Are they all "neutered" the same way? What gets done to the prime mover to de-rate it, is it only de-turbocharged or is the locomotive just re-engined with a 16-645? I'm sure there's more ways to skin a cat, but this is an interesting subject!

almo

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Subject Written By Date/Time (PST)
  Why no SD75s on UP? Mike Stimpson 07-31-2007 - 14:02
  Re: Why no SD75s on UP? E 07-31-2007 - 14:25
  Re: Why no SD75s on UP? cajon 07-31-2007 - 16:05
  Re: Why no SD75s on UP? Ross Hall 07-31-2007 - 17:55
  Re: Why no SD75s on UP? Ross Hall 07-31-2007 - 17:58
  Re: De-rating Locomotives almo 07-31-2007 - 22:03
  Re: De-rating Locomotives Mike Stimpson 08-01-2007 - 09:22
  Re: Why no SD75s on UP? E 08-03-2007 - 16:12
  Re: Why no SD75s on UP? BNSF Rail Guy 07-31-2007 - 17:57
  Re: Why no SD75s on UP? Rod Mason 07-31-2007 - 18:45
  Re: Why no SD75s on UP? almo 07-31-2007 - 19:59
  De-rating Bruce Butler 08-01-2007 - 09:27
  Re: Why no SD75s on UP? David Jansson 08-01-2007 - 09:33
  Re: Why no SD75s on UP? E 08-01-2007 - 09:54
  Re: Why no SD75s on UP? Brian Bigelow 08-01-2007 - 19:58
  Re: Why no SD75s on UP? Rich Hunn 08-02-2007 - 09:14
  Re: Why no SD75s on UP? PNWrailfan 08-07-2007 - 01:44


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