Re: [NSW] Tangara Derailment , Hornsby

["Dr Morals" <linuxnewbie@optusnet.com.au>]

What is common here is the amount of speculation (a fairly dangerous type in
this climate) just leave it to the media.
Dr
<signal_spotter@my-deja.com> wrote in message
8lbdio$ln3$1@nnrp1.deja.com">news:8lbdio$ln3$1@nnrp1.deja.com...
> In article <y4Wd5.40881$N4.1548908@ozemail.com.au>,
>   "Chris Downs" <cvdowns@ozemail.com.au> wrote:
> > I have no track or signal diagrams.
> >
> > For the points immediately north of Hornsby on the down Shore
> (platform 3) I
> > thought each blade on the points was controlled separately.
> Therefore to
> > act as catch points both point blades held towards the centre putting
> a
> > passing train into the dirt.  The down departure signal on platform 3
> is
> > located just short of the end of the platform and the points in
> question are
> > virtually on top of the signal.
> >
> > I assume (time to make an ASS of U and ME) that this is what happened.
> >
> > Right or wrong?
> >
> > Chris
> >
> So did the accident happen on Platform 2 or 3. Platform 3 is the up
> main as pointed out. The points just north of that are not
> independantly controlled, they're called 'slips'. In other words it's 2
> sets of points in the one. And they're controlled by levers 521 and
> 522. At the north end of platform 3 the points are independantly
> controlled by levers 522 (the other end to the slips) and 524. Both of
> them can be normal and the train will fall in the dirt. With the slips
> there will always be a correct lie of the points so no matter what way
> they're lying a train shouldn't derail unless of course they
> become 'trailing' behind the train and it backs into them.
>
> regards Ian
> Signal Design Engineer and Hornsby expert
>
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.