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| From | Ruben Safir <mrbrklyn@panix.com> |
|---|---|
| Newsgroups | nyc.transit |
| Subject | Re: huh? "12,800 feet of new aluminum third-rail"?? |
| Date | 2025-10-07 23:20 +0000 |
| Organization | PANIX Public Access Internet and UNIX, NYC |
| Message-ID | <10c477e$86f$1@reader2.panix.com> (permalink) |
| References | <Pine.NEB.4.64.2510062000350.5657@panix2.panix.com> <10c1q3g$tre$1@gal.iecc.com> <10c43c6$15c$1@reader2.panix.com> |
Thor Lancelot Simon <tls@panix.com> wrote: > In article <10c1q3g$tre$1@gal.iecc.com>, John Levine <johnl@taugh.com> wrote: >>According to danny burstein <dannyb@panix.com>: >>>. Improvements so far include the replacement of 128 bridge spans that >>>connect tracks, column to column; the addition of 12,800 feet of new >>>aluminum third-rail; and the addition of 6,500 feet of signal cables, >>>25,000 feet of new running rail, and over 40,000 feet of new communication >>>cables. >>> ====== >>>rest: >>>https://www.amny.com/nyc-transit/park-avenue-viaduct-metro-north-10062025/ >>> >>> huh? aluminium third-rail ?? Is that legit? Thanks >> >>Sure. Here's a company that makes them, aluminum with a steel cap. >> >>https://www.rail-fastener.com/the-third-rail.html >> >>Aluminum conducts much better than steel so I'd expect the power losses to >>be lower, and in new construction you could put the power feeds further apart. >> >>It says "The conductivity of aluminum alloy is 3-4 times that of low carbon steel." > > The conductor is so large, I doubt the lower resistance of aluminum vs steel > matters much. Losses _in the 3rd rail_ should be truly minimal. > > However, aluminum 3rd rail with a steel wear strip is much lighter than solid > steel rail and that has to make life a whole lot nicer for anyone installing, > removing, or maintaining it. > It is not a moving part so I don't give a shit. What I do care about is that the MTA is removing a track that can last 100+ years with something that will have the life expectency of a chowowa - 18 years top. They don't give a shit
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huh? "12,800 feet of new aluminum third-rail"?? danny burstein <dannyb@panix.com> - 2025-10-06 20:02 +0000
Re: huh? "12,800 feet of new aluminum third-rail"?? John Levine <johnl@taugh.com> - 2025-10-07 01:24 +0000
Re: huh? "12,800 feet of new aluminum third-rail"?? tls@panix.com (Thor Lancelot Simon) - 2025-10-07 22:14 +0000
Re: huh? "12,800 feet of new aluminum third-rail"?? danny burstein <dannyb@panix.com> - 2025-10-07 22:34 +0000
Re: huh? "12,800 feet of new aluminum third-rail"?? Ruben Safir <mrbrklyn@panix.com> - 2025-10-07 23:15 +0000
Re: huh? "12,800 feet of new aluminum third-rail"?? Ruben Safir <mrbrklyn@panix.com> - 2025-10-07 23:20 +0000
Re: huh? "12,800 feet of new aluminum third-rail"?? Ruben Safir <mrbrklyn@panix.com> - 2025-10-07 23:13 +0000
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