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                                       split separate exit tracks for a parallel V-crossing
     
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1st message | this message only posted: 18 Apr 2017 22:32
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from:
Panos Tsirigotis
 

 

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Hello again.
Why it is not possible to split separate exit tracks for a parallel V-crossing.
Is there any alternate way to split a separate exit track when the V is parallel?

Thank you in advance



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2nd message | this message only posted: 18 Apr 2017 23:15
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from:
Martin Wynne
West Of The Severn, United Kingdom



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Panos Tsirigotis wrote:Why it is not possible to split separate exit tracks for a parallel V-crossing.
Is there any alternate way to split a separate exit track when the V is parallel?
Hi Panos,

Change to a regular V-crossing, and then click tools > make return curve.

You can then also split the exit track on the turnout.

parallel V-crossings are a bit of an oddity in Templot, essentially a legacy option left over from the early days. If I was starting again I doubt that I would implement them.

In fact they are not fully developed, as you found. For example you can't split the exit, and the turnout-side platforms don't work. Those items are on my NOD list (nice one day), but not near the top. :)

They do have the advantage that they work for a transition curve template, whereas make return curve does not. But that is easily overcome using the make transition functions.

The big advantage of having a separate template for the return curve is that a turnout can be inserted in it.

There is a very old tutorial about return curves here -- it needs updating:

 http://templot.com/martweb/mintut1a.htm

regards,

Martin.

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3rd message | this message only posted: 19 Apr 2017 18:15
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from:
Panos Tsirigotis
 

 

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Thank you Martin but as I can see from the tutorial a "return curve" function makes a curved brunch track from the turnout while I need to exit straight from the turnout and make the curving at a distance from the turnout. In attached screenshot you can see:
The ladder above is made with turnout parallel V-crossing
The ladder below is made with return curve

I dont know which one is the correct transition in the real thing but I do like the above. 

Regards


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4th message | this message only posted: 19 Apr 2017 18:52
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from:
Martin Wynne
West Of The Severn, United Kingdom



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Post your questions on the forum where everyone can see them and add helpful replies.
Hi Panos,

I'm sorry, I don't understand your question. It's better to post your .box file rather than a screenshot so that I can see what you are trying to do.

If you want a return curve with an intervening straight section, there are various ways to do it. For example:



1. set the required TS adjacent track spacing and make an ordinary crossover.

2. extend some approach track on the turnout (F3), and then tools > make split > make plain track turnout road > on external geometrical radius.

3. on the original turnout tools > make branch track. Use peg/align tools > extend/shorten to meet to set it to the exact length.


Alternatively, you could use the make transition functions. That gives you more control over the radius, and would allow a turnout to be inserted in it and roamed into position. More about that method at:

   http://templot.com/companion/link_existing.html

regards,

Martin.

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5th message | this message only posted: 19 Apr 2017 19:32
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from:
Panos Tsirigotis
 

 

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Thank you Martin.
With the ordinary crossover function I got the idea.

Kind regards
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