Templot Club Archive 2007-2020                             

topic: 746Questions on points
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posted: 1 Mar 2009 15:19

from:

Hayfield
 
United Kingdom

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I enjoy making points but my knowledge about them is very limited, two questions I would like answered if possiable are

1 Peco, SMP etc quote radius for points eg. 36" which varies from the minumum radius on Templot templates, are the radius quoted by these companies the radius the point fits into rather than the radius of the crossing angle.

2 Martin ,via another website gave me a tutorial which made a much better looking and running Y point, than the one I was making. Again the likes of Peco and SMP have very short Y points, which granted work but visually are not a patch on the one I made as per Martins tutorial

Sorry if this has been covered before.

 

John

 

 

posted: 1 Mar 2009 18:28

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Hayfield wrote:
1 Peco, SMP etc quote radius for points eg. 36" which varies from the minumum radius on Templot templates, are the radius quoted by these companies the radius the point fits into rather than the radius of the crossing angle.
Hi John,

Most commercial pointwork gives the "substitution" radius, i.e. the curve into which the turnout could be substituted. The actual radius in the rails is normally smaller than this, sometimes significantly so. There is a video about substitution radius at:

  http://www.templot.com/martweb/videos/subs_rad.exe

When you get into Templot it is better to mostly forget about radius and think in terms of crossing angles. You soon get a feel for which angles correspond to "sharp", "medium", "gentle", etc. Furthermore this applies to all scales, whereas a radius figure is only meaningful if you also know the scale.

Again the likes of Peco and SMP have very short Y points, which granted work but visually are not a patch on the one I made as per Martin's tutorial
Peco and similar makes are not based on prototype designs, so they can't really be expected to look right. It's worth giving them a good forgetting when you start using Templot and building your own track. :)  It's better to look to the prototype as a reference, rather than other models.

regards,

Martin.



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