Re: Safeworking!

[Stuart Turnbull <stuartt@netspace.net.au>]

David Langley wrote:
> 
> John Duncan McCallum wrote:
> 
> >
> >
> > I may be wrong, but I think Port Augusta to Port Pirie (Solomontown) was
> > worked by
> > electric staff. All crossing loops on this section had relatively large
> > Station
> > buildings, which appeared to contain a locked room. AFAI can remember,
> > all trains
> > stopped at each loop for safeworking purposes.
> > It may have changed now, but the last ES section was Spencer Junction -
> > Port Augusta.
> >
> > John McCallum
> 
> I don't remember that station buildings but it was certainly ES of the miniature
> variety using S type instruments. The last section of ES was in fact 2 sections -
> Stirling North-Port Augusta-Spencer Jcn. Stirling North signal box McKenzie &
> Holland frame and somersault signals was replaced by a relay interlocking worked by
> a PLC (Programmable Logic Controller with override facilities from Train Control
> PA.) at the same time and PA - Spencer Junction became yard working.
> 
> David Langley.


The TAR was certainly worked using MES instruments. I believe the 
instruments were installed whilst the line was being built so 
construction trains operated under MES rules which is the reverse to 
what normally happens.

I have in my possession a magnificent brass miniature staff for the 
section McLeay-Woocalla to prove that the line was worked using this 
system. I believe the instruments were not disimilar to the VR pattern.

Stuart Turnbull