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- From: jbrandt@hplred.HPL.HP.COM (Jobst Brandt)
- Date: Thu, 19 Nov 1992 01:41:01 GMT
- Subject: Re: Pantograph pickup width Swiss 460
- Message-ID: <3840004@hplred.HPL.HP.COM>
- Organization: Hewlett-Packard Laboratories, Palo Alto, CA
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!sdd.hp.com!hpscit.sc.hp.com!scd.hp.com!hpscdm!hplextra!hplred!jbrandt
- Newsgroups: rec.railroad
- References: <urf.722020840@sw2001>
- Lines: 27
-
- Doug Jones writes:
-
- > I've always been impressed with Swiss catenary, because they seem to
- > make more consistent use of curved catenary than any other place >
- I've been.
-
- This style of hanging catenary is especially aesthetically pleasing
- when hung in a series of "S" bends using only upright masts on the
- outside of the bends so the catenary zigzags from pole to pole with
- the contact wire suspended over the track by progressively sloped
- suspenders. In spite of this, the contact wire must must still be
- made to hunt laterally to prevent cutting a groove in the contact
- beam.
-
- What I find curious about this is that only private railways and
- branch lines of the SBB use this technique as though there were some
- need for a more rigorous suspension for mainline overhead. The SBB
- branch line to Glarus and Linthal uses curved catenary. Mainline
- catenary, in contrast, is suspended by extra masts and outrigger bars
- that in some cases are extra long because they are supported by
- cantilever beams and support mast from the inside of the curve. This
- implies that masts on the other side are not to be used.
-
- Since the mountain railways have many curves, they show off their
- graceful three dimensional catenary curves often.
-
- jobst_brandt@hplabs.hp.com
-