home *** CD-ROM | disk | FTP | other *** search
- Xref: sparky rec.models.railroad:2338 rec.railroad:9007
- Newsgroups: rec.models.railroad,rec.railroad
- Path: sparky!uunet!charon.amdahl.com!pacbell.com!ames!saimiri.primate.wisc.edu!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!hobbes.physics.uiowa.edu!news.uiowa.edu!news
- From: jones@pyrite.cs.uiowa.edu (Douglas W. Jones,201H MLH,3193350740,3193382879)
- Subject: Re: Pantograph pickup width Swiss 460
- Sender: news@news.uiowa.edu (News)
- Message-ID: <1992Nov18.053023.25928@news.uiowa.edu>
- Date: Wed, 18 Nov 1992 05:30:23 GMT
- References: <urf.722020840@sw2001>
- Nntp-Posting-Host: pyrite.cs.uiowa.edu
- Organization: University of Iowa, Iowa City, IA, USA
- Lines: 28
-
- From article <urf.722020840@sw2001>, by urf@icl.se (Urban F):
- > I read in mbz 5/92 that Roco's HO model of the new Swiss class
- > 460 engines has a pantograph with a pickup only half the width
- > (+- 3mm instead of +- 6mm) of what the NEM standard says.
- >
- > Presumably this corresponds with a similar decrease on the
- > prototype. How has this been accomplished?
-
- I've always been impressed with Swiss catenary, because they
- seem to make more consistant use of curved catenary than any
- other place I've been. That is, when rounding a curve, the
- catenary wire (or top wire, or support wire) is off to one
- side, so that it pulls the running wire to the side at every
- support point. This keeps the running wire within a few
- (prototype) centimeters of the centerline of the track, so
- narrow pickup shoes should pose no problems.
-
- By comparison, most catenary I've seen in the US, or France and
- Italy, for that matter, has been strung with the support wire
- directly above the running wire, so that both hang straignt
- from one lineside support pole to the next. This leads to
- deviations of on the order of 10 to 20 cm from the centerline
- of the track on a curve, and it clearly needs a wider shoe for
- safe running.
-
- Doug Jones
- jones@cs.uiowa.edu
- tjhe
-