Templot Club Archive 2007-2020
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posted: 13 Jan 2012 23:39 from: r_wilton
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Hi I've been trying to turn the RH turnout shown here into a tandem turnout without much success. I've looked at the Tandem video but get lost halfway through. 2200_131831_110000000.png  I want a second LH turnout before the RH one. Can any one help? I've attached a box file of the above section. Regards Ray. |
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| Attachment: attach_1311_1785_group_2012_01_13_2320_43.box 208 | |||
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posted: 14 Jan 2012 12:37 from: Alan McMillan
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Hi Ray Is this what you have in mind? If it is, I'll do a finished version for you. Regards Alan |
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| Attachment: attach_1312_1785_R_Wilton_Tandem.box 244 | |||
| Last edited on 14 Jan 2012 12:39 by Alan McMillan |
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posted: 14 Jan 2012 15:37 from: r_wilton
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Hi Alan. Yes, that looks perfect, very kind of you to offer to finish it off.  Ray. |
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posted: 14 Jan 2012 16:47 from: Alan McMillan
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I'll get to it on Monday. Alan |
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posted: 16 Jan 2012 09:23 from: Alan McMillan
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Hi Ray Here's your tandem finished and ready to go. Go to workpad>hide name labels and hide control template to see it more clearly. Regards Alan |
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| Attachment: attach_1315_1785_R_Wilton_Tandem.box 227 | |||
| Last edited on 16 Jan 2012 09:27 by Alan McMillan |
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posted: 16 Jan 2012 12:47 from: Martin Wynne
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Hi Alan, Thanks for helping Ray with his tandem turnout. Unfortunately you omitted to add the check rails for the middle crossing. I think the first turnout as a curviform B-8 may be a better fit to the location: 2_160731_560000001.png  2_160731_560000000.png  Note that there are only 3 base templates and peg positions. It's not usually necessary to have multiple pegs in lots of different places. Just create the partial templates as duplicates of the basic 3 templates, with the various rails turned on and off, blanked or extended to length as required. This design uses a gaunt turnout for the middle crossing and the mouse action check rail adjustments, so it is for TDV only and won't work in 091c. File attached below. I have left the timber shoving as an exercise for the reader.  regards, Martin. |
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| Attachment: attach_1316_1785_ray_00sf_tandem.box 252 | |||
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posted: 16 Jan 2012 12:59 from: Alan McMillan
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Martin Wynne wrote: Unfortunately you omitted to add the check rails for the middle crossing. Oops! Much embarrassment. Thanks for pointing it out Martin...and thanks for showing a better way of doing the middle crossing. My way did seem to work, but as you say, it's messier. Regards Alan |
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posted: 16 Jan 2012 15:40 from: r_wilton
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Hi Martin/Alan. Many thanks for your valued assistance. Just need to work out how to import it back into my layout (sorted) and build it. Regards Ray. |
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| Last edited on 16 Jan 2012 16:35 by r_wilton |
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posted: 16 Jan 2012 19:04 from: Rob Manchester
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Hi Ray, I watch the tandem topic with interest as I may like to include one in my latest layout design ( in which case thanks to Martin and Alan for helping out). Have you figured out the best way to actually build a tandem yet ( which bit first ) ? Iain Rice reckons on having two of the crossings electrically linked ( left and middle or right and middle ) and switching the crossings from the tie bar as normal. Sounds fine unless anybody has other suggestions ? Regards Rob |
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posted: 16 Jan 2012 21:32 from: Paul Boyd
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Hi Rob I would build a tandem by starting from one stock rail and working across - for a Blue Peter job, see http://picasaweb.google.com/103525373077464937002/Shotley# for example. Iain Rice's suggestion is fine and is what I've done - it doesn't matter which of the two crossings the centre is electrically connected to. Cheers |
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posted: 16 Jan 2012 22:47 from: Rob Manchester
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Paul, Many thanks, excellent picture show. Must get some crossing nose chairs, always tried to avoid them for some reason. I do like the way you make up sections of rail on one template and then transfer them over to the main one. I can see me having trouble making sure the chairs are all on at the right time though. You seem to differ from Mr. Rice in one important respect - there isn't a bottle of scotch on the work table ! Thanks again Paul, always a pleasure to see nice crossing work. Rob |
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posted: 16 Jan 2012 23:39 from: r_wilton
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Rob Manchester wrote:
I will probably tackle this the same way as I built my first (and only to date) turnout. Vee crossings and wing rails, followed by check rails, then add the stock rails and lastly the switch blades.
From what I can make out the crossing and wing rails are all isolated as per a normal turnout, then the two crossings nearest the toe are switched with the first switch blades and the third crossing with the second switch blades. Regards Ray |
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posted: 18 Jan 2012 00:28 from: Chris Mitton click the date to link to this post click member name to view archived images |
r_wilton wroteHi Ray This doesn't quite work out. The problem you get is that if you set the first switches to the leftmost route and the second to the rightmost, then both left and right roads (but not the centre) will be live. This combination, obviously, doesn't normally arise because if the first switch is set to the left then a train coming from the facing direction won't negotiate the second switch anyway - however it means that careless operation might cause unwanted movements! One solution is to interlock the two switches so that you can't reverse the first unless the second is also reversed. Another way is to change the wiring slightly - there is a diagram in Scalefour Society digest 24.5.1, which I've used and it does work. Essentially, the farthest crossing is fed from either the stock rail / blade / closure rail leading to it, or from the near crossing, depending on which way the second switch is set. Hope this helps - I'll post a diagram tomorrow if this is incomprehensible! Regards Chris |
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posted: 18 Jan 2012 08:50 from: John Shelley
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Chris Mitton wrote: r_wilton wroteIf I may do a bit of self trumpet blowing, I have diagrams as downloadable pdfs on point wiring on my site atHi Ray http://www.stciers.me.uk/home/track_wiring/trackwiring.htm For the 3 way the second V is switched between the first V and one of the feeds rather than between the two feeds. Cheers for now John, from 33820 St Ciers sur Gironde, France |
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posted: 18 Jan 2012 10:03 from: r_wilton
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Chris Mitton wrote:
Hi Chris. Are you talking about the track beyond the turnout becoming live or the frogs? As I'm running DCC It's only the vee/crossings that I'll be switching. I don't see a problem with what I've proposed but then again I'm new to this so may be wrong. Ray. |
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| Last edited on posted: 18 Jan 2012 10:04 by r_wilton |
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18 Jan 2012 10:04 from: Chris Mitton click the date to link to this post click member name to view archived images |
John Shelley wroteIf I may do a bit of self trumpet blowing, I have diagrams as downloadable pdfs on point wiring on my site atThanks John, that's pretty much what I meant! Chris |
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posted: 18 Jan 2012 10:26 from: r_wilton
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John Shelley wrote:If I may do a bit of self trumpet blowing, I have diagrams as downloadable pdfs on point wiring on my site at Hi John. That's what I had in mind, I guess I didn't explain myself very well. Ray. |
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posted: 24 Jan 2012 20:16 from: Katier click the date to link to this post click member name to view archived images |
I may need help here too.. like Ray I get lost in the tutorial video and have possibly two I need for my layout. If anyone would be willing to help out it would be most appreciated. Thankyou. | ||
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posted: 27 Jan 2012 13:26 from: Katier click the date to link to this post click member name to view archived images |
I've attached the troublesome box file. If someone can help would be appreciated. | ||
| Attachment: attach_1336_1785_emmyton_12_01_27_1305_00.box 211 | |||
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posted: 29 Jan 2012 13:29 from: Katier click the date to link to this post click member name to view archived images |
No-one able to help ?  |
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posted: 29 Jan 2012 22:48 from: Tony W
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Katier wrote: I've attached the troublesome box file. If someone can help would be appreciated.Hi Katier. With those crossing angles you will not get a tandem turnout to work. There are a number of restrictions about combining turnouts in this way. I have altered the turnouts in the station approach tandem to arrive at something more feasable but am still pushing it with the middle crossing. This will give you a bit more length than the original design you posted. The goods yard point (the pink one) I have left as a three throw for the moment. Although appropriate in a goods yard, they can be difficult to construct and operate and if you do not fancy the challenge there may be an alternative of making the turnout before the three throw a tandem instead. I have only done them in rough for the moment, it is not worth sorting out the timbering etc until the design is finalised, I have learned that the hard way. Anyway, see what you think. Tony. |
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| Attachment: attach_1343_1785_emmyton_12_01_29_2215_45.box 140 | |||
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posted: 30 Jan 2012 00:09 from: Katier click the date to link to this post click member name to view archived images |
Hi tony, Fantastic. The station throat looks fine, at the end of the day it's gained space over a non-tandem arrangement which was the whole point. I actually think the tandem on the crossover is a better option than the 3-throw. Should give more siding length and be easier to 'get over' to the coal drop siding? Thanks so much, really appreciate it. If you can adjust the two would be appreciated. Gonna need me to replace the current crossover (which is already assembled) in the goods yard but that's life - I'll see if I can use it elsewhere instead.Can probably use it on the station approach as the two crossovers are very similar. |
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