Templot Club Archive 2007-2020                             

topic: 3811Fan of sidings
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posted: 8 Nov 2020 09:09

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

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As mentioned previously, now the nights are drawing in I'm back to Templot, after a break of 9 months or so.

I thought I would ask: what's the easiest way of producing a fan of sidings? Below is part of the plan for the fiddle yard, and I'll like to connect the sidings to the turnout already shown. The two shape lines are the extent of the space available, and the running line (top), is fixed in its radius and transition settings (this is just part of a larger plan). The turnout size and location can change; I'd like a minimum radius of around 1250mm.

499_080407_530000000.png499_080407_530000000.png

I've included the box file.

Thanks.
(off for another day in the garden: time to sow sweet pea seeds, and take some rose cuttings)
Attachment: attach_3173_3811_scratch_for_fan_out_2020_11_07_1020_56.box     14

posted: 8 Nov 2020 13:43

from:

Martin Wynne
 
West Of The Severn - United Kingdom

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Hi Richard,

There's quite a lot to think about for a fan of sidings. The first is storage capacity. Do you want roughly equal length in all roads? That means laying out the turnouts in a tree configuration with each road splitting into two.

Or with one much longer road but each additional road getting progressively shorter? That means laying out the turnouts in a string along the inner or outer road.

If the string configuration is laid along the running line, it has an advantage for model control in that to select a road only one turnout needs to be reversed, the rest being reset normal. So a simple rotary switch is sufficient. For a tree configuration a logic matrix of some sort is needed.

Next is to lay out the siding alignments with sufficient spacing for running clearance, and for a fiddle yard with additional clearance for handling the rolling stock.

2_080850_260000000.png2_080850_260000000.png

You have indicated a string design, so I continued with that. Create a branch track on each turnout, convert it to a simple link to the next road. Check the resulting radius. If ok insert the next turnout in it and repeat, otherwise go back and use a longer crossing angle on the previous turnout.

You started with a B-8 generic. I kept the generic crossings, but lengthened the turnouts to C-8.5 to keep above your radius limit. Here's a quick video clip of that:

 http://flashbackconnect.com/Movie.aspx?id=7XEUQKCkZy19sGXlB1U5xw2

cheers,

Martin.

posted: 8 Nov 2020 18:22

from:

richard_t
 
Nr. Spalding, South Holland - United Kingdom

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Brilliant Martin - I hoped it would be that easy!

Thanks so much

Richard.



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