Templot Club Archive 2007-2020
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posted: 29 Sep 2008 18:52 from: Scott Willis click the date to link to this post click member name to view archived images |
Attached is the track plan I am currently working on. You will see that the plan is based on an Iain Rice drawing. It is intended to base the layout on a North British branch line around the Borders. In typical NB style, turnouts will have interlaced sleepers and loose heel switches. To produce a nice sweeping curve, the main running line and the loop line have been drawn using transition s-curves. Can anyone tell me what would be the best way of incorporating two crossovers into the transition s-curves to complete the run-round loop. Having tried a number of techniques from the tutorials, I found that I am having trouble maintaining the original s-curves. Many thanks Scott |
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| Attachment: attach_357_576_NBbranch.bgs 235 | |||
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posted: 29 Sep 2008 19:08 from: Scott Willis click the date to link to this post click member name to view archived images |
Sorry for the last attachment. I have attached the track plan again, this time as a jpeg. Regards Scott |
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posted: 29 Sep 2008 23:25 from: Martin Wynne
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Scott Willis wrote: To produce a nice sweeping curve, the main running line and the loop line have been drawn using transition s-curves. Can anyone tell me what would be the best way of incorporating two crossovers into the transition s-curves to complete the run-round loop Hi Scott, Can you say the scale and gauge? And the overall size? From the track spacing in the loop and 1ft (?) squares it seems to be about 7mm scale, but the platform is narrow even at 4mm scale. Is the short track at the back of the platform a passenger line? I think it affects the geometry of the loop. If yes, it's likely that the tandem turnout is double-sided with the middle route as the main road. If the track behind the platform is a goods siding, it's more likely that the tandem is single-sided with the right-hand route as the main road. As usual with sketched track plans, drawing the track as a centre-line only instead of the actual rails can be very misleading about the amount of space available. If you can give a bit more detail I can better suggest how to lay out this plan. regards, Martin. |
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posted: 30 Sep 2008 00:28 from: Scott Willis click the date to link to this post click member name to view archived images |
Hi Martin The published plan was drawn for 4mm scale, my chosen scale is S-Scale. After re-scaling, each square on the published plan represents 14.28" - making it just over 12' long. The track situated directly behind the platform is a goods siding and not a passenger line. It would have been clearer if I had uploaded the two transition s-curves superimposed onto the plan. Unfortunately my computer skills don't extend that far so I have attached them to this message. Hopefully you will get the idea. Regards Scott |
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posted: 30 Sep 2008 05:50 from: Martin Wynne
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Hi Scott, Thanks for filling in the details. If the short track behind the platform is a siding, I think it is better not to make the loop an S-curve into it, but to create a separate run-round loop alignment. Then it all goes together quite nicely.  The tandem checking looks ok, and I managed not to have it on a transition:scott_nbr1.png  scott_nbr2.png  scott_nbr3.png  I will get the tandem finished and some timbers shoved and then perhaps make a bit of video. regards, Martin. |
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posted: 30 Sep 2008 23:52 from: Scott Willis click the date to link to this post click member name to view archived images |
Martin Thank you very much for that, it looks great. I didn't expect you to take it as far as you have or as quick as you have, It would have taken me a few late nights. One thing I seem to have problems with is making tandems/3-ways, it will be interesting to see the video. I initially thought there might be a problem producing the turnout leading off the tandem. When looking at the published plan, this turnout looked like it could be at too tight an angle to produce the long curved siding. You have made it all fit very well. Looking forward to see the final product. Regards Scott. |
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