Re: Approach to Sydney Central

["Paul Cassar" <railroad2000@optusnet.com.au>]

A tangential turnout is a high speed turnout. The switchers are not as high
as normal turnouts and are supported by a thicker switch plate.

--
Paul Cassar
http://members.optusnet.com.au/~pcassar/index
Ben O'Regan <ben@NOSPAMFORemiratespark.com.au> wrote in message
392e18f0@news.hunterlink.net.au">news:392e18f0@news.hunterlink.net.au...
> Could you please explain the difference between a tangential turnout and a
> normal one.
>
> Thanks,
>
> Ben
>
> C. Dewick <craigd@lios.apana.org.au> wrote in message
> news:88sg6c$c63$1@jedi.apana.org.au...
> > "Hubert Lam" <hubert@imap4.com> writes:
> >
> > >Hmm...Dr. Bradfield's ingenenuity. Now why the hell is that place a
> complete
> > >dump? Seems like CityRail/State Rail has decided that most of the scrap
> > >metal and rubble should be placed there. What a great place to do it!
> Right
> > >next to the approaches to Australia's largest railway station...and we
> have
> > >something called "The Olympics" coming up...wonder if they'll bother
> > >cleaning that crap up/
> >
> > It does get cleaned up. 99 percent of that rubbish is broken up
trackwork
> > and turnouts which have been removed from service during the Sydney Yard
> > track remodelling over the past two years.
> >
> > >Also the flyover structures look quite old and so does the track (i.e.
> > >wooden sleepers, no continuosly welded rail). Any plans for that to be
> fixed
> > >before September?
> >
> > They are old - the City Railway construction started around the end of
WW1
> > and the flyovers were built in the early 1920's MCR. No reason to rush
out
> > and replace them. Besides, the logistics of replacing them all in such a
> > short space of time would be horrendous. 8-)
> >
> > There are no concrete ties there for a reason - the ballast bed isn't
deep
> > enough to support concrete, and the extra trackbed vibration would
> actually
> > be detrimental to the longer-term stability of the structures.
> >
> > Concrete ties are nearly twice as high as timber ones, and they have
much
> > worse vibration damping properties. The turnouts are being replaced
> slowly -
> > Sydney Yard has almost been finished now with all tangential turnouts
and
> > higher speeds (40 kph through almost every road except the platform
> tracks)
> > that before.
> >
> > Regards,
> >
> > Craig.
> > --
> >             Craig Ian Dewick            |       Stand clear - jaws
closing
> >  Send email to craigd@lios.apana.org.au |  Visit my Australian rail
> transport
> >    Professional Train Driver, Cityrail  |      and rail modelling web
> site:
> >        and HO scale rail modeller       |
> http://lios.apana.org.au/~craigd
>
>