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Re: Pantographs (was Re: MBTA BREDA Light Rail Cars)
- Subject: Re: Pantographs (was Re: MBTA BREDA Light Rail Cars)
- From: "Michael Kurkowski" <gunzel@gunzel.net>
- Date: Sat, 2 Jan 1999 10:05:48 +1100
- Newsgroups: misc.transport.urban-transit, aus.rail
- Organization: The Internet Group Ltd
- References: <36869EBA.D475663B@value.net> <19981227233109.01063.00002417@ng-ce1.aol.com> <Pine.SUN.3.95.981228183624.27755C-100000@unix2.netaxs.com> <36882507.D67@REMOVEiprolink.co.nz> <36882948.62FECEC4@value.net> <368833E3.148B@REMOVEiprolink.co.nz>
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:Silas Warner wrote:
:
:> There are usually two reasons why a locomotive might have two
pantos.
:> One is to bridge "dead spots" in an overhead wire, but this is not
the
:> usual reason. The usual reason is that the pantos are designed for
:> one-way operation, and cannot be asily reversed. This was true of
:> early Faiveley (one-arm) pantographs. which could only be operated
with
:> the "elbow" facing backward: a forward-facing wlbow would be forced
up
:> by the air rush of the panto's passage and might snag the wire.
A lot of Melbourne Hitachi's have Failveley pantos, facing with the
elbow facing the rear of the train. The train can also run in both
directions like this so i don't think that could be the case. In the
late 70's there were however problems with a lot of the Faiveley
pantos as far as i know, and these were replaced with Metro Vickers
pantos which were being taken from the Taits being withdrawn/scrapped
at the time.
Hope this helps,
Michael Kurkowski
Melbourne Australia.
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