Templot Club Archive 2007-2020
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posted: 2 Dec 2011 12:51 from: LSWRArt
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I am hoping to start a new layout in 'o' gauge and traditionally would have used, say a 72" straight turnout, or a 48" / 72" curved turnout. How does this relate to the nomenclature that all you clever guys use, such as B-7. I do not understand what is a B turnout (are there A, C- Z turnouts?). I do understand that 7 means a 1 in 7 crossing angle, but I do not see how to convert radius to angle to know what crossing angle to choose. |
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posted: 2 Dec 2011 13:03 from: Dave Summers
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LSWRArt wrote: I am hoping to start a new layout in 'o' gauge and traditionally would have used, say a 72" straight turnout, or a 48" / 72" curved turnout. How does this relate to the nomenclature that all you clever guys use, such as B-7.I commend the huge resources available to you on Templot Club before you post these questions which Martin spends a lot of time politely and patiently answering. See Real Track for an answer to your question. Most of us are not clever, merely helping Martin by helping ourselves. Regards Dave |
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posted: 2 Dec 2011 13:36 from: Martin Wynne
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LSWRArt wrote: I do not understand what is a B turnout (are there A, C- Z turnouts?).Hi Art, Welcome to Templot Club and thanks for joining.  Very briefly: Yes -- the traditional bullhead-rail range of switches from about 1925 (called "R.E.A." semi-curved) runs from A (shortest point blades) to F (longest point blades). Modern high-speed flat-bottom turnouts can be much longer. These in turn are combined with different crossing angles to produce a wide range of turnouts. Then the whole turnout can be curved onto any radius as required, like this: 2_280716_410000000.png  Some typical radius sizes (internal geometrical radius) for straight turnouts in 0 Gauge -- these are very approximate depending on various settings and options: A-5 63" 5ft A-5.5 76" 6ft B-6 91" 8ft B-7 123" 10ft B-8 160" 13ft C-9 202" 17ft C-10 249" 20ft D-12 358" 30ft regards, Martin. |
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posted: 2 Dec 2011 14:31 from: wcampbell23
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If you are a beginner with Templot, invest some time getting to know the program - the tutorials and videos are a great help. I think the real trick is to start with the proverbial blank sheet of paper - draw the space you have and sketch what you want on a sheet of paper. Get the outline of your space into Templot - either using the background drawing options or by importing a scale drawing from a scan or drawing program. Use Templot to create your layout - don't worry about the exact radius of curves - just keep an eye on the minimum so that you do not have problems with rolling stock on tight curves. It's easy to vary the parameters when creating turnouts - so experiment with what works and change it if it doesn't. Regards. Bill Campbell |
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| Last edited on 2 Dec 2011 14:32 by wcampbell23 |
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posted: 2 Dec 2011 15:17 from: LSWRArt
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Thanks Martin and Bill - both replies very helpful. I am looking forward to Templot V2 being available so that I can try it. Regards, Art |
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