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| From | tls@panix.com (Thor Lancelot Simon) |
|---|---|
| Newsgroups | nyc.transit |
| Subject | Re: huh? "12,800 feet of new aluminum third-rail"?? |
| Date | 2025-10-07 22:14 +0000 |
| Organization | Public Access Networks Corp. |
| Message-ID | <10c43c6$15c$1@reader2.panix.com> (permalink) |
| References | <Pine.NEB.4.64.2510062000350.5657@panix2.panix.com> <10c1q3g$tre$1@gal.iecc.com> |
In article <10c1q3g$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. -- Thor Lancelot Simon tls@panix.com "The liberties...lose much of their value whenever those who have greater private means are permitted to use their advantages to control the course of public debate." -John Rawls
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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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