Unusual PW configurations thread both real and model.

[keefer]

maybe not unusual, but i found this (maybe) a bit odd.

St. Andrews (New) station in 1955

 

 

i know a siding leading to a running line would need to be trapped, but i thought that having a headshunt would obviate the need for separate/additional trapping - the headshunt would provide the necessary protection?

Signalbox diagram from 1933 shows the trap and headshunt as separate items: https://signalbox.org/diagrams.php?id=357

IIRC the headshunt was later removed and so the 'internal' trap would then be the only protection.

 

Any thoughts?

 

(image used is a crop from a Nigel Dyckhoff picture in either 'The Anstruther & St. Andrews Railway' or 'St. Andrews Railway' by Hadjucki et al, pub. Oakwood Press)

Edited March 1, 2023 by keefer

[£1.38]

The access to the headshunt is not at the end of the bay road. The ground signal on the left shows to where stock may be parked.

 

Here is an interesting arrangement from an early photo of an American colliery line... a mixture of conventional point blades and pivoting track, by the looks of it.

 

[PatB]

maybe not unusual, but i found this (maybe) a bit odd.

St. Andrews (New) station in 1955

 

trap1955.jpg

 

i know a siding leading to a running line would need to be trapped, but i thought that having a headshunt would obviate the need for separate/additional trapping - the headshunt would provide the necessary protection?

Signalbox diagram from 1933 shows the trap and headshunt as separate items: https://signalbox.org/diagrams.php?id=357

IIRC the headshunt was later removed and so the 'internal' trap would then be the only protection.

 

Any thoughts?

 

(image used is a crop from a Nigel Dyckhoff picture in either 'The Anstruther & St. Andrews Railway' or 'St. Andrews Railway' by Hadjucki et al, pub. Oakwood Press)

Might there have been local circumstances where vehicles would stand foul of the headshunt points and so require a trap closer to the running line? Edited June 24, 2017 by PatB

[keefer]

Thank you for the replies - it's been a while since I read the books, so I'll have to look again to see if there's any mention beyond what traffic the loading bank was used for.

I'll also have to look to see when the headshunt was removed

[Dave John]

An interesting picture keefer, clearly shows the interleaved sleepering. 

[Pacific231G]

This was or will be a common rail transition point in a duel gauge track

The wider gauge rail (red rail in drawing) has been removed or yet to be installed

 

duel.jpg

 

John

Interesting John. I've a feeling I saw something like this on the quayside at St. Valery Sur Somme before the track was relaid and rationalised.I think that one may have been directing metre gauge stock from three rail dual gauge track with a common rail to the four rail track with the metre gauge between the S.G. track that runs between St. Valery and Noyelles- the main line junction.  I wonder what the speed restriction would be with this formation. With a conventional set of points the tyre and the front of the flange  is positively directed by the relevant point blade and its profile is designed for that,with this arrangement the wheelset is forced to diverge by the check rail pushing on the flat back of the wheel; presumably with a certain amount of squealing. 

Edited June 27, 2017 by Pacific231G

[TheSignalEngineer]

This is a nice bit of curved scissors crossing at Broad Street.

 

Rattling from Richmond by Geoff Dowling, on Flickr

 

Third rail and also has plenty of nice infrastructure details included.

[micknich2003]

maybe not unusual, but i found this (maybe) a bit odd.

St. Andrews (New) station in 1955

 

trap1955.jpg

 

i know a siding leading to a running line would need to be trapped, but i thought that having a headshunt would obviate the need for separate/additional trapping - the headshunt would provide the necessary protection?

Signalbox diagram from 1933 shows the trap and headshunt as separate items: https://signalbox.org/diagrams.php?id=357

IIRC the headshunt was later removed and so the 'internal' trap would then be the only protection.

 

Any thoughts?

 

(image used is a crop from a Nigel Dyckhoff picture in either 'The Anstruther & St. Andrews Railway' or 'St. Andrews Railway' by Hadjucki et al, pub. Oakwood Press)

Keefer, the answer to your question is shown on the Signalbox Diagram, the points from the Loading Dock are Hand Worked, hence the "Additional" Trap.

[Re6/6]

An unusual and odd gauge arrangement. The picture was published a couple of days ago in the Washington Post as part of some rather good and dramatic images from all over the US.

 

Is it of Bethlehem Steelworks dated 2016 with standard gauge plus some broad gauge or could it be standard and narrow sharing a common rail? The 'guard rails' would appear to cover a 'broad gauge'. A bit puzzling.

 

Also some simple catenery. A nice picture nonetheless!

 

Ctsy Washington Post.

 

[Vistisen]

Triple gauge point at Bentley miniature railway.

[Siberian Snooper]

An unusual and odd gauge arrangement. The picture was published a couple of days ago in the Washington Post as part of some rather good and dramatic images from all over the US.

 

Is it of Bethlehem Steelworks dated 2016 with standard gauge plus some broad gauge or could it be standard and narrow sharing a common rail? The 'guard rails' would appear to cover a 'broad gauge'. A bit puzzling.

 

Also some simple catenery. A nice picture nonetheless!

 

Ctsy Washington Post.

Bethlehem Steel 2016 a.jpg

A very atmospheric shot.

[keefer]

Keefer, the answer to your question is shown on the Signalbox Diagram, the points from the Loading Dock are Hand Worked, hence the "Additional" Trap.

Thanks for that, I hadn't noticed they weren't numbered. Must dig the book out, I wonder if there would've been the need for some hand shunting of vans/wagons? Headshunt used to 'store' a couple of emptied wagons until their return load arrives, so the loading bank can be used for other traffic in the meantime?

[railsquid]

lnteresting interlaced track in Portsmouth. Amazing that it has lasted so long.

 

Tram track. 1 a jpg.jpg

Tram track. 3 a jpg.jpg

 

Intrigued, I googled around a bit and also found this:

 

 

on another thread.

 

Also, a potted history of trams in Portsmouth: http://www.welcometoportsmouth.co.uk/portsmouth

[Ian Smeeton]

Browsing through the Transport Treasury collections, I found this:

 

 See next post.

 

I am guessing that it is some sort of springloaded trailing turnout for an area which is worked by gravity.

 

Happy to be put right though if I am barking up the wrong creek.

 

Regards

 

Ian

 

Edited to remove bad link

Edited August 28, 2017 by Ian Smeeton

[Ian Smeeton]

Similar but different here:

 

 

http://thetransporttreasury.zenfolio.com/mdtMtEWggmQECAHBabgzDUA==.fav

 

Regards

 

Ian

Edited August 28, 2017 by Ian Smeeton

[AndyID]

Browsing through the Transport Treasury collections, I found this:

 

 See next post.

 

I am guessing that it is some sort of springloaded trailing turnout for an area which is worked by gravity.

 

Happy to be put right though if I am barking up the wrong creek.

 

Regards

 

Ian

 

Edited to remove bad link

I think you are correct. There seems to be a chair holding the rail on the right in a fixed position.

[Portchullin Tatty]

I have never seen a tandem turnout formed in modern flat-bottom rail before, but here are a few photographs:

 

 

I have also never seen checkrails immediately in front of the toe of the switch but there were lots of examples of this (one in the last picture) plus this one:

 

 

All taken at Scunthorpe last week.

[Re6/6]

Thanks for those Mark. Interesting to see that the toe check rails which l fitted on the late 'Matford' in front of a 'troublesome' scissors crossing are in fact used on the real railway!

Edited September 20, 2017 by Re6/6

[Portchullin Tatty]

Thanks for those Mark. Interesting to see that the toe check rails which l fitted on the late 'Matford' in front of a 'troublesome' scissors crossing are in fact used on the real railway!

 

You can sleep well in your bed now!!

 

The trackwork was very twisty turny across the site as you would expect and there were plenty of really tight curves - down to "radius 2" was the joke amongst us that were there.  Although the track actually looked in fairly good condition (it needs to be, there are some pretty heavy weights being carried around), I doubt it is perfect.  I guess that these are an insurance policy against the tight curves and less than 100% trackwork - probably like on Matford!!!

 

There were lots of interesting things about the visit (which is well worth doing by the way).  I will start a thread on the stock there at some point.  I for one know precious little about what I was looking at though!

 

 

Mark

[martin_wynne]

If derailments frequently occur at the entry to a switch, this can be controlled by means of a conventional check rail. Here's an example of that:



Pic thanks to Adrian Marks, originally posted on RMweb, see:

 http://www.rmweb.co.uk/forum/viewtopic.php?p=129570#p129570

regards,

Martin.

[russ p]

Whitlingham and brundal junctions have them

[davefrk]

This is only a single of course, but it must be a half inside, half outside slip. None of it straight either. Brian

I found this old post interesting but then couldn't remember where I saw it.

 

I had thought it was a similar layout to this on Wharfeside but on investigation it's close but no cigar.

 

 

Still, there must be a few similar set-ups somewhere in the UK.

 

Dave Franks.

[micknich2003]

Whitlingham and brundal junctions have them

 Here's another example, Walton Street Hull, Up Scarbrough Branch.

[Grovenor]

I found this old post interesting but then couldn't remember where I saw it.

post-5773-0-79029100-1423247670.jpg

Its from one of the original P4 articles in the Model Railway Constructor, it was at Clapham Jcn.

Regards

[martin_wynne]

Wharfeside yard.jpg

 

 

Hi Dave,

 

That's a half-scissors (side road entirely outside the diamond). Here is one at Shrewsbury:

 

 

Martin.