Templot Club Archive 2007-2020                             

topic: 3840Irregular slips
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posted: 23 Dec 2020 11:10

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

posted: 23 Dec 2020 12:45

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:

2_230728_020000000.png2_230728_020000000.png


Or maybe something more spacious and easier to build:

2_230743_340000000.png2_230743_340000000.png

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

cheers,

Martin.

posted: 24 Dec 2020 14:26

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.
Attachment: attach_3198_3840_Bodmin_No5.box     6



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