... topic: 3361 Scissors Crossover posted: 3 Dec 2018 15:47 from: richard_t Hi I'm trying to design a scissors crossover for my fiddle yard. It should be fairly simple, all the turnouts are B-8, and the roads are straight, but I can't get the diamonds correct. I've isolated the 4 turnouts and include as an attachment. Also a quick screenshot: 499_031042_560000000.png I can manage the K crossings (but I've not included in them in the box attached), but the diamond V crossings have ... topic: 3361 Scissors Crossover posted: 3 Dec 2018 15:47 from: richard_t Hi I'm trying to design a scissors crossover for my fiddle yard. It should be fairly simple, all the turnouts are B-8, and the roads are straight, but I can't get the diamonds correct. I've isolated the 4 turnouts and include as an attachment. Also a quick screenshot: 499_031042_560000000.png I can manage the K crossings (but I've not included in them in the box attached), but the diamond V crossings have ...

... high risk) When using them I advise making sure that both ends of the timbers are glued to the track bed and I guess glued to something like cork rather than my preferred underlay of closed cell foam and an impact adheasive If you want to go down the road of thin sleepers use ply and make sure the solvent you use is Butanone, I also use spirit based stain thinned down and applied first to the long strips by brush and allowed to dry off before use. For anyone starting out I would strongly recommend using ... 4.04Copperclad construction+ chairs £9.42Ply timbers& chairs £7.50Plastic timbers& chairs £9.66Using the additional special plastic chairs From £3.50 extra The copperclad costs were based on the old price, at a guess you could add another £2 to the costs, in fiddle yards this can be offset by using fewer timbers without affecting the strength of the turnout Rather than Vero pins, its far simpler to use either a piece of metal shim (scrap brass from a fret or buy 0.5 mm x 2 mm metal strip or better still ...

... Dave, Thanks for posting your plans. You've made some rapid progress there! I noticed that in a few places you have made diamond-crossings where the crossing angle differs between the two half-diamonds. That will produce a dog-leg in the diagonal road through the K-crossings. Getting diamonds to run nicely is always tricky in 00, so it's best to keep the same angle both ends. That's easy to do -- starting with one of the half-diamonds as the current/control template, ... the xtrkcad backdrop (which incidently is the xtrkcad image in the files folder). Any tips or alterations I'd love to hear your views. nb the open point at the top of the plan is like that intentionally as it will lead to a lower level fiddle yard. Kind regards Dave Long http://groups.yahoo.com/group/templot/files/Proof%20Housed%20Junc/ posted: 5 Dec 2007 10:39 from: Martin Wynne Hi Dave, Thanks for posting your plans. You've made some rapid progress ...

... posted: 5 Sep 2017 17:53 from: John Palmer Thanks, Martin! I failed to adjust the checkrail not only on the slip leading to the Up Siding (near the Cattle Market) but also the slip leading from Up Main across to Number One Road via the Down Main. Probably because this is a shallow-angled diamond (almost too shallow?), the check rail adjustment via 'customise V-crossing' had no effect and I failed to notice the problem until prompted to review the layout by your ... " series. There are a few departures from the OS plan, partly because I hae me doots about some of the alignments, but more importantly because I wanted to show the 1936-37 alterations to the layout, primarily affecting the ladder of slips across the yard and the connection into the Up Main. Whilst excluding what I take to be the tramways, I have included the lower end of the Clandown Branch, and the standard gauge incline across the bridge giving access to Tyning colliery and batches. Also shown are the ...

... station in Birmingham with plenty of freight opperations& maybe a bit of shunting to some kind of business. I think the plan has potential& after using Google maps& the metric calculator in Templot it works out at 9ft from the tip of the station to the road bridge which gives me 2 scenic breaks& keeping it small sized. Thanks. Parts of Templot Club may not function unless you enable JavaScript (also called Active Scripting) in your browser. Templot Club> Forums> Prototype pics> Langley green. about Templot ... the junction. After my thread about modellers block& the replys i got i did a bit of research into the stations mentioned& found Langley Green a possible place to base my model. I know their was a junction their once upon a time& a goods yard further down the line which could warrant me to use the trackplan& make a fictious station in Birmingham with plenty of freight opperations& maybe a bit of shunting to some kind of business. I think the plan has potential& after using Google maps& the ...

... Wynne Hi Derek, Ian, Mike, Tony, Thanks for your feedback. But as I mentioned, the geometry on circular curves is not the difficult part. The difficult bits are a. doing the maths for transition curves, slewing zones, and the turnout roads through double junctions; b. deciding on an acceptable allowance for model discrepancies such as end-play in axle-boxes, off-centre bogies, body-sway, etc., without creating excessive clearance as in the AMRA dimensions; c. providing ... various locations as required. This allows clearances to be checked: Having spent a good deal of the weekend using this new function I have to congratulate Martin on his brilliant idea. It took me less than half an hour to discover that the clearances in my fiddle yard were insufficient for what I wanted to achieve. Result, complete re-draw, much easier (and cheaper) than fining out the hard way when it's built. Next job is to check the rest of the payout and prove it will hold the vehicles ...

... At the very least you will need to rotate the plan to make full use of the available width. I think it's unlikely that access to the engine shed would require turning the table. It's more likely that the engine shed would be on one of the through roads across the turntable. regards, Martin. posted: 18 Jan 2012 11:49 from: KeithArmes I know this is a long time after the original post, but 24" is the recommended minimum radius for 2FS. regards, Keith Parts of Templot Club ... think that works with 2mm FS. Alan posted: 7 Jan 2012 11:58 from: Martin Wynne Hi, The problem with using a program such as Illustrator is that you can end up with some impossible curves, as Alan explained. The turnout into the yard by the signal box looks impossibly sharp. A tandem turnout there might work better. To get a full 180 degree turn in a width of only 720mm will require an extremely sharp curve which may not work in 2mm finescale. At the very least you will ...

... so used only on heavy-traffic areas such as the throat of a main-line station or at an important junction. Elsewhere two shorter timbers might be used end-to-end, with the gap in the 4-foot of the least-used road, as in Alan's and Fraser's pics. Sometimes for extra strength and resistance to gauge-spread they might be half-spliced together, with an old fishplate bolted on as a splint, as Phil suggests. The downside to that, apart from the need ... Hi John, That 25ft timber is not necessarily too long. Most companies kept timbers up to about 20ft as stock items. That's enough to span a double-track crossover, etc. Longer timber up to about 30ft would be ordered as specials from the timber yard, as needed. But they were expensive, so used only on heavy-traffic areas such as the throat of a main-line station or at an important junction. Elsewhere two shorter timbers might be used end-to-end, with the gap ...

... switch toes and crossings, brick-by-brick is the only feasible approach. Having exactly matched one turnout you can move on to the next. Whichever approach you adopt, avoid closing in on the detail too early. You don't need to add in slip roads or shove conflicting timbers until the overall design is finalized. Otherwise you risk wasting a lot of work when you realise that the parcels dock is too short or the goods shed is too close to the signal box. Sorry this is an inconclusive ramble. Anyone ... flow" of sinuous curving rail can do much to hide the fact that it is less than 50% of the proper length. So laying out the curves first can be a big help. Not to mention knowing in advance that to get round into the fiddle yard at 42" radius will mean doing without one of the carriage sidings. On the other hand Templot makes it easy to overdo things. Putting a 20-metre radius in a terminal platform when there is no obvious reason why it couldn't have been built straight ...

... you would visualise immediately how much that is? To be honest as far as Templot's concerned a simple reminder to 'do the measurements in mm' -would be enough for this dozy b*gger! The whole things an anochronism really isnt it, I mean our road signs are still in miles! Anyway I know have my first templates- looking forward to building them! posted: 17 Jan 2008 01:54 from: Phil O Hi All Paul Boyd wrote: It's a strange old world, but please don't put cm ... teach young children how to measure before they could count beyond ten- also millimetres are rather small to a 5 year old! As it happens, I understand what 30 miles is, and have to convert 50km to that to understand it. A metre and a yard are not much different. I can happily use metric or imperial when modelling, but usually use the latter as the prototype until recently was also imperial (working in 1:64 and latterly 1:32 this is no hardship!) and using millimetres to ...