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| Re: NY Senate Urges MTA To Reject Proposal To cut LIRR service into Penn Station (1140518) | |||
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Re: NY Senate Urges MTA To Reject Proposal To cut LIRR service into Penn Station |
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Posted by Wado MP73 on Sat Feb 18 19:11:59 2012, in response to Re: NY Senate Urges MTA To Reject Proposal To cut LIRR service into Penn Station, posted by Olog-hai on Sat Feb 18 15:31:14 2012. It's utterly inefficient to have duplicate electrification; it's just not done.It's done where it gives operational flexibility. The Euston-Watford DC line is kept DC even though the paralleling tracks are AC powered so tube trains can run on it. North London line used to have duplicate electrification before they got dual-capable Class 313. Although in the States, I can only think of PATH in the old days and the NYP area. and MBTA has what to do with this? An example of diesel operation under catenary. AIUT, it's a NYS project. AIUT? I don't know that one. It's not as expensive to put rectifiers on M7s as keeping multi-voltage equipment such as the M2/4/6/8 You'd need transformers too. Not just rectifiers. The cost of maintaining AC only equipment is not that different from AC/DC dual capable ones when compared to DC only equipment. since when are M7s "DC-only"? They do have AC traction motors, albeit with the IGBT inverters. Do I even have to comment on that? You know exactly what I meant. They will only take DC power. Block length, remember? Average speed is doubled there versus what's intended for NYP-ALB, a regional-type operation. Huh? What that has to do with frequency of service? Obviously, I wasn't talking about operational speed. |
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