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- Path: sparky!uunet!dtix!darwin.sura.net!sgiblab!slxinc!jim
- From: jim@specialix.com (Jim Maurer)
- Newsgroups: rec.railroad
- Subject: Re: High Speed Rail Questions
- Message-ID: <C01wz4.CLJ@specialix.com>
- Date: 30 Dec 92 02:45:03 GMT
- References: <1992Dec30.012335.19001@wam.umd.edu>
- Organization: Specialix Inc.
- Lines: 18
-
- crh@wam.umd.edu (Craig Hinners) writes:
-
- >b) What exactly is "welded rail"? I assume this means they actually
- > melt the two ends of the rail together so that if you went up to
- > the rail, you wouldn't be able to tell where the joints were.
- > Correct? Also, it seems to me that the heating process of welding
- > the rails together would produce some warping in the rails, which,
- > although minute, could cause buggers at very high speeds? Can some-
- > one describe the actual process of fusing two lengths of rail and the
- > machinery involved?
-
- Yes, they actually weld the rails together. In the field I believe
- they do thermite welds. (At least they used to. I've seen pictures
- of this.) Nowadays they weld it at rail welding plants into long
- strings that are transported on special cars. It looks real strange
- to see a welded rail train going around a curve. Just shows how
- flexible rail really is. After making a weld the weld is ground down
- so it's flush.
-