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                 Irregular slips
     
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1st message | this message only posted: 23 Dec 2020 11:10
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from:
Graham Long
 

 

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I have started making a single slip. My initial step was to "make irregular diamond at intersection". The setup is a main road of 6000mm radius with an adjacent loop road on a radius 6044.67. The ladder turnout was a 1:8 with a resultant turnout radius of 4286.96. The slip will go from the loop road (6044.67 radius) to the branch. This resulted in a one V of 4.37 and the other of 6.86 I thought these were relatively generous curves. However, in another topic Martin  mentioned that a V of 1:5 was  much to small for a slip road. What is considered to be the smallest V that I could use? I could make the branch curve bigger but then there wouldn't be a the same curvature through the ladder and turnout. I would also be interested to know how close the V should be to a whole number or half of one e.g. 1:6, 1:6.5, 1:7 and so on.Thanks for any advice

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2nd message | this message only posted: 23 Dec 2020 12:45
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from:
Martin Wynne
West Of The Severn, United Kingdom



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Hi Graham,

Those crossing angles are too short for an inside slip, other than perhaps in industrial sidings. At those angles it would be more usual to have an outside slip or a half-scissors.

Please if possible post your .box file with questions, otherwise I have to guess what it is exactly that you are trying to do. I think you are making a single line branch junction curving away from the outside of curved double track.

In such locations a half-scissors is the most likely, rather than a slip. Something like this perhaps:




Or maybe something more spacious and easier to build:



If you post your .box file I can be more specific in replying.

cheers,

Martin.

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3rd message | this message only posted: 24 Dec 2020 14:26
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from:
Graham Long
 

 

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Graham Long wrote: I have started making a single slip. My initial step was to "make irregular diamond at intersection". The setup is a main road of 6000mm radius with an adjacent loop road on a radius 6044.67. The ladder turnout was a 1:8 with a resultant turnout radius of 4286.96. The slip will go from the loop road (6044.67 radius) to the branch. This resulted in a one V of 4.37 and the other of 6.86 I thought these were relatively generous curves. However, in another topic Martin  mentioned that a V of 1:5 was  much to small for a slip road. What is considered to be the smallest V that I could use? I could make the branch curve bigger but then there wouldn't be a the same curvature through the ladder and turnout. I would also be interested to know how close the V should be to a whole number or half of one e.g. 1:6, 1:6.5, 1:7 and so on.Thanks for any advice
Hi Martin 
I think I have attached my latest plan. Could you let me know if it makes sense. After your previous reply I think I will stay with a regular slip. The ourside slip looks a bit complicated.

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Attachment: Bodmin No5.box (Downloaded 19 times)
 
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