Templot Club Archive 2007-2020
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posted: 25 Oct 2009 13:35 from: Dave Summers
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I know that there is a function in Tools to adjust adjacent track centres, but does anyone have any guidelines as to how much the centres should be increased by? For example; in 7mm scale I plan a double track with minimum radius of 6ft. I want to ensure that should I run, say, 70ft stock on both tracks simultaneously I will avoid a 'coming together'. Is there a function that I haven't found that can give me this or do I calculate it by looking at chords and tangents of circles? Or does someone have a crafty 'rule-of-thumb' for this? I realise that bogie centres etc on each vehicle will influence the answer but I'm looking for a general solution. Any ideas? Cheers Dave |
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posted: 25 Oct 2009 16:39 from: wcampbell23
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Hi Dave If you are a member of the Gauge O Guild than I think that the information you need is in the handbook. Regards Bill Campbell |
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posted: 25 Oct 2009 19:23 from: Dave Summers
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wcampbell23 wrote: Hi DaveHi Bill I am and it is! I just never thought of looking there. Many thanks for the heads up. Cheers Dave |
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posted: 26 Oct 2009 08:24 from: Jamie92208 click the date to link to this post click member name to view archived images |
The simple way that I did it was to print out a short section of the curve then make a template out of cardboard the same length and width of my longest vehicle. 2 small holes at the bogie centres and then put that on the template track centre lines. It showed me the throwover needed. I then added 5mm on for good measure. This seems to work. Jamie |
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posted: 26 Oct 2009 08:51 from: Dave Summers
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Thanks for the suggestion Jamie. That empirical method would have been my last resort. However, I am currently in a hotel in a far-flung corner of the former empire and have no access to either a printer or my 70ft stock! Bill's earlier suggestion gave me the 'scientific' answer. Cheers Dave |
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posted: 26 Oct 2009 18:33 from: Jim Guthrie
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Dave Summers wrote: Thanks for the suggestion Jamie. That empirical method would have been my last resort. However, I am currently in a hotel in a far-flung corner of the former empire and have no access to either a printer or my 70ft stock! Bill's earlier suggestion gave me the 'scientific' answer.Dave, If you've got a CAD program on your laptop you can do the empirical bit on that.  Jim. |
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posted: 26 Oct 2009 19:09 from: Dave Summers
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Hi Jim CAD perhaps, but I still need to know bogie centre distances etc. which I don't have. I do have a CAD program but I've never used it and I don't have the time or enthusiasm to learn just for this one task. Getting Templot to do what I want of it is enough of a challenge for one lifetime! The GOG Manual has a table where some helpful soul has done all of the hard work and, for the parameters I described, I can now just set the MS Adjacent Track Centre to 90mm and the job is done! Cheers Dave |
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