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| Re: NJT Board considering large capital expenditure on new rolling stock, including DMs & EMUs, July (644747) | |||
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Re: NJT Board considering large capital expenditure on new rolling stock, including DMs & EMUs, July |
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Posted by Olog-hai on Sat Jul 5 16:13:20 2008, in response to Re: NJT Board considering large capital expenditure on new rolling stock, including DMs & EMUs, July, posted by Fred G on Sat Jul 5 11:52:37 2008. If you can tell me what kind of "expertise" can basically do the equivalent of shoe-horning an ALP46 onto a PL42AC without adding axles to distribute the weight, let's hear it.One thing you gotta consider is that you aren't going to be able to reduce the size of the transformer—that's limited by the equation VS/VP = NS/NP (in other words, you are going to need a lot of coil "turns" to accommodate the high voltage in order to step it down to a lower voltage for traction, and those turns are always the same, plus you're going to need the same kind of cooling capacity so that you don't burn out that transformer). Also, BBD has limited off-the-shelf diesel locomotive technology. The only one they offer is the Traxx DE (think of an ALP-46 as a diesel). The prime mover in that series of loco is built by MTU (yup, the same MTU that owns Detroit Diesel), rated at 2950 horses at a rather high 1860 RPMs. If BBD can glue that and the ALP46 together (which is itself a Traxx electric) and keep everything on four axles and under 295,000 pounds while meeting FRA crashworthiness and emissions specs plus meeting the horsepower and HEP requirements on the NJT RFP, it'll be nothing short of a miracle |
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