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- From: jbvb@vax.ftp.com (James B. VanBokkelen)
- Newsgroups: rec.railroad
- Subject: Re: High Speed Rail Questions
- Keywords: thermite rail welding
- Message-ID: <921230173224@cream.ftp.com>
- Date: 30 Dec 92 22:32:24 GMT
- References: <1992Dec30.032216.905@ee.ryerson.ca> <9o1LwB5w165w@1776.COM>
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- In article <9o1LwB5w165w@1776.COM> bob@1776.COM (Robert Coe) writes:
-
- > I believe the process involves using scrap aluminium (shredded pieces
- > provide more surface area), some compound containing iron and a catalyst
- > compound, ...
-
- Thermite is what was supposedly used in that famous old MIT fraternity
- prank wherein a streetcar was welded to its rails at the stop in front
- of 77 Mass Ave (and not in Kendall Square subway station, as some
- revisionists have suggested)...
-
- I've heard both the story of the streetcar welding, and the story of
- the greasing of the Cambridge-Dorchester subway's rails in Kendall
- Sq. many times, but never accompanied by any hard evidence. The streetcar
- welding would have had to be no later than mid-40s, given the location.
-
- At any rate, classic Thermite is powdered iron oxide and aluminum
- filings (dust is better). You do need a fairly hot igniter to get it
- going, but I've seen a torch used. It is still fairly widely used
- for field welds, but I think most welding plant welds are made
- electrically (butt welding as opposed to arc welding). I'm not sure
- what length rail you can buy new, but I know a lot of RRs are still
- pulling up old jointed rail, clipping the ends and welding long strings.
-
- James B. VanBokkelen 2 High St., North Andover, MA 01845
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