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Re: Indian Pacific Crash
- Subject: Re: Indian Pacific Crash
- From: "Notagunzel" <notagunzel@bigfoot.com>
- Date: Sun, 5 Sep 1999 22:28:06 +1000
- Newsgroups: aus.rail
- Organization: Neitherside Trains
- References: <7qfcbv$2ktn$1@otis.netspace.net.au> <mauried.417.37CB50BC@commslab.gov.au> <7qfofl$2m84$1@otis.netspace.net.au> <_xPy3.53$VJ5.7427@nsw.nnrp.telstra.net> <37D05E2D.9681877B@melbpc.org.au>
- Reply-To: "Notagunzel" <notagunzel@bigfoot.com>
John Duncan McCallum <mccallum@melbpc.org.au> wrote in message
37D05E2D.9681877B@melbpc.org.au">news:37D05E2D.9681877B@melbpc.org.au...
> Notagunzel wrote:
> > The points are self restoring, and to provide the logic to state when
the
> > train has passed over the points, there is a crude system resembling an
> > axle counter. This uses commercial proximity detectors & a PLC to count
> > the axles. BUT... this 'section' is only between the fouling point of
the
> > loop, and the toe of the turnout, so if the poor soul pushed the reverse
> > button just as the train approached, the points would have motored
across
> > in front of the IP, admitting it into the loop, and on to the goods.
There
> > is therefore, AFAIK, no approach locking.
> To my knowledge, the above arrangement is/was only installed at loops
> between
> Port Augusta and Tarcoola. West of the latter location, all loops were
> fully
> manual.
AFAIK the loops between Pt Augusta & Tarcoola once had arrangements similar
to Coonamia - Stiring North, but the system I described above was installed
on all loops Pt Augusta - Parkeston & Alice Springs. I think when the Pt
Augusta - Tarcoola loops had 3 Position Autos & point motors, the loops nth
& west of Tarcoola were manual. Perhaps this is what you are thinking of??
:o)
--
Mr Notagunzel.
Rail Transportation Connoisseur.
notagunzel@bigfoot.com
(Waiting for the next move at http://www.bigfoot.com/~notagunzel)