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Interlaced Crossover / Straightened Slip - inside half-scissors

Cransford

Member
Location
New Southgate
Apologies if the title isn't bang on, but only other thought would be a straight slip!

From my baffled beginner message, I've started to think how best to proceed with a more definite layout of Dover Priory about time of electrification. From a layout in book on Southern Stations [copy of page attached, please beat me with a stick if I shouldn't have!], within the London end of tunnel there is a crossover interlaced with crossover leading to down side yard. I believe I'm correct in assuming that the switches of each abut the crossing front of the other [box file attached]. Thus makes sense for a peg position at that position. As usual, it'll be 'spot the obvious', but despite trawling the menu's I can't work out how to fix the peg at the desired location. Can anyone point me in the right direction [no pun intended!].

My next quest would be at some point to work out how to create the obtuse crossings &checks. If there is already any guidance, once again, let me know.

Dover.jpg


Cheers,

Paul
 

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Martin Wynne

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West of the Severn UK
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Apologies if the title isn't bang on, but only other thought would be a straight slip!
Hi Paul,

I don't recognise your user name from the old Templot Club, so if you are new here, welcome to Templot Club. :)

I don't know of a specific name for that formation, it is sometimes called an inside half-scissors. When combined with the other two turnouts it might be called an offset scissors crossover.



edit: since writing what follows I have made a video showing a slightly different way to create an inside half scissors:




But straightened slip makes it easier to grasp, with the switches inside the V-crossings, as in an ordinary slip.

That being so, I suggest to construct the 1:8 turnouts using the 1:8 slip switches from the switch list:

paul_straight_slip5.png


paul_straight_slip6.png



Peg one turnout onto the MCP peg position on the other:

paul_straight_slip7.png



Then obtain the turnout-road radius into some plain track:

paul_straight_slip1.png



You can then peg it onto the switch heel to replicate the turnout curve:

paul_straight_slip2.png



Repeat for the other turnout and then make diamond-crossing at intersection of the two plain tracks:

paul_straight_slip3.png



Shorten the two half-diamonds to just leave the K-crossings:

paul_straight_slip4.png


That gives you all the crossing positions and alignments.

Then you can split it up into partial templates, and do the timbering (or maybe not bother, if it is hidden in a tunnel :) ).

If you need more detail on how to do any of that, maybe someone else can jump in. I'm sorry I'm up to my neck with web stuff at present. :( . At some stage I will make a video, as it's an interesting and useful formation.

cheers,

Martin.
 
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Martin Wynne

Admin
Location
West of the Severn UK
Info
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Enjoy using Templot?
Thanks.

Please do not send requests for help direct to me via email.

Post your questions on the forum where everyone can see them and add
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Isn’t that a Barry slip?
Dave

Hi Dave,

No, there are no K-crossings in a Barry Slip, both turnouts are of the same hand:

2_130910_590000000.jpg

Thanks to Mick Nicholson for this pic.

cheers,

Martin.
 
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Cransford

Member
Thread starter
Location
New Southgate
Martin,

As always many thanks for pointing in the right direction. Your valuable time is much appreciated. At the moment the timbering will be one of the last things to worry about and I think I'll be OK with it. I know that any 'special' chairs wouldn't have been a problem as the Southern had their own foundry at Redbridge [near Southampton] where all things were possible!
 
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Martin Wynne

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Location
West of the Severn UK
Info
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Enjoy using Templot?
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Please do not send requests for help direct to me via email.

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