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Search results for: 2_280950_180000000.jpg
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... one short one (straight-cut joggled). There are 2 drives (point levers). Each stretcher bar is attached to one long switch blade, and through a hole in the other long blade to the opposite short blade behind it. The drives have to be moved in sequence. Each one must be returned to normal before you can reverse the other. The drawing shows both drives normal, so either can move as drawn. These switches are 12ft and 14ft-6in GER pattern with a common heel position. 2_280950_180000000.jpg The full-size scan can be seen by viewing this in the Image Gallery or by clicking: gallery/2 /original/2_280950_180000000.jpg I used the longer 18ft switches in the design because you want to put the whole thing on a sharp curve. Curving this as it stands would create too sharp a radius. Alan, you might like to try changing the inner one to 15ft, and then aligning it on a common heel position with the outer 18ft switch. The switch front can be shortened if necessary, as ...
... 10 Aug 2019 14:32 from: Martin Wynne Rob Manchester wrote:....and the last 3 pics from Bernard....... 2001_100820_090000000.jpg Rob Hi Bernard, Rob, That's a three-throw switch, not a tandem. Many thanks for posting. Notice how the stretcher rods for the shorter switch blade run through holes in the longer switch blade. Pictures here of an MR three-throw from Tony W: topic 2839- message 19982 Here's a GER diagram of a three-throw switch: 2_280950_180000000.jpg The full-size scan can be seen by viewing this in the Image Gallery or by clicking: gallery/2 /original/2_280950_180000000.jpg cheers, Martin. posted: 10 Aug 2019 19:49 from: Rob Manchester Hi Martin, Thanks for the GER 3-throw diagram. I assume the first set of switch rails( nearest the toe) would have been undercut as no joggle is evident on the diagram? The second set has a joggle on both running rails with straight cut blades- which I guess one ...
... posted: 27 Oct 2009 10:46 from: Martin Wynne Hi Simon, The man to ask for all things GER is Adrian Marks of this parish. You can send him a private message by clicking: http://85a.co.uk/forum/pm.php?send_to=Adrian%20Marks I believe the Great Eastern Railway Society have some track drawings available: http://www.gersociety.org.uk There is quite a lot of GER info in C. J. Allen's 1915 book, here are a couple of scans from it: 2_290310_180000000.jpg 2_280950_180000000.jpg Click the above images to go to the relevant pages in the Image Gallery, where you can click the links to see the original full-size scans. I can do more scans if you wish, but probably not today. Some information about GER plain track is at: http://groups.yahoo.com/group/templot/message/5230 regards, Martin. posted: 27 Oct 2009 11:36 from: Simon Dunkley Hi Martin, Ade has already contacted me directly and may be able to help me track ...
... is correct, I should have said tandem turnouts. Incorrect use of terminology on my part. I will now take myself aside for a good thrashing! Ian posted: 10 Feb 2012 16:03 from: Martin Wynne Mike Waldron wrote: were 3-way points used on mainlines generally? or were they reserved for space saving around sidings and MPDs? Hi Mike, It's confusing to refer simply to "3 -way" turnouts. "Three-throw" turnouts, where the switch blades are coincident like this: 2_280950_180000000.jpg (larger version in the Image Gallery) were never used in running lines. They are found only in yards and sidings. "Tandem" turnouts, where the two switches are staggered, are quite common in running lines, like this one in the down main at Crewkerne: message 3292 regards, Martin. posted: 10 Feb 2012 16:25 from: Mike Waldron Hi Martin I was meaning tandem offset ones- like the S4 and EM gauge associations send out with their templates- with the switches staggered. Mike ...
... . The inner blade is the short blade. You will also need a knuckle in the running rail. Alan posted: 29 Mar 2012 10:07 from: Martin Wynne mike47j wrote: I can follow the tandem turnout for the central frog, but I'm not sure what to do at the toe end. In the image gallery is a drawing of a Great Central three-throw which shows the centre blades are 3ft longer than the outer blades. Hi Mike, I think you mean this Great Eastern 3-throw? 2_280950_180000000.jpg The full-size original scan is easier to read (click the links): http://85a.co.uk/forum/view_gallery_single.php?display=ALL&page=175 The inner switch rails extend 2ft-6in beyond the outer ones. To follow the drawing exactly will require a full custom design with partial templates, because each switch comprises one long inner switch blade (with undercut planing) and one short outer one (straight-cut joggled). The inner 14ft-6in switch rails have a real heel, ...
... theory rather than a specific example I'm looking for. regards Dave posted: 12 Jul 2012 21:29 from: Martin Wynne dave turner wrote: What is the difference between 3way and tandem turnouts? Hi Dave, Any turnout having 3 exits is called a 3-way turnout. They divide into 2 types: 1. three-throw turnouts. In this case both switches are coincident. They are difficult to build and prototypically rare -- used only in sidings and yards, and not at all for many years: 2_280950_180000000.jpg 2. tandem turnouts. In this case the switches are staggered so that the second switch is placed beyond the heel of the first one. They further divide into two types -- more usually with the second switch in the main road of the first switch; or occasionally with the second switch in the turnout road of the first switch. Tandem turnouts can be double sided or single-sided, according to whether the central exit is the main road (double-sided), or one of the side exits is ...
... from: Paul Boyd Spotted what? posted: 20 Aug 2013 08:02 from: John Palmer Useful view of the switches visible to me in Gallery Images, but not within the OP's post. posted: 20 Aug 2013 09:27 from: Martin Wynne Here are Ian's pics. Click them to see the hi-res originals which contain some useful details -- the Midland Railway was fond of 3-throw turnouts. Many thanks Ian. 2013_190424_470000000.jpg 2013_190425_140000000.jpg Here again is the GER drawing -- spot the differences: 2_280950_180000000.jpg Some notes about it: message 5256 Martin. undefined posted: 23 Aug 2013 22:08 from: Martin Wynne Mick Nicholson has kindly supplied this pic of a NER three-throw turnout. NER Whessoe Lane Darlington: 2_231705_570000000.jpg It's interesting to note the different chair types. Also each switch is carried on separate interlaced timbers. Martin. posted: 27 Aug 2013 00:37 from: Martin Wynne Another pic of the Butterley 3-throw here: http://www.rmweb.co.uk/community/index.php?/topic/ ...
... stretcher bars keeping all rigid and moving together? I assume there would have been no difference between lever actuation and the connection to a rodding crank linked back to the signal frame? Tim posted: 19 Oct 2017 13:04 from: Martin Wynne Hi Tim, Tony, More pics of a Midland 3-throw switch and stretcher bars here: topic 2291- message 15251 Click the pics to see the high-resolution originals. The high-res version of the GER drawing is here: gallery/2 /original/2_280950_180000000.jpg regards, Martin. posted: 19 Oct 2017 13:51 from: Tony W Hi Tim. As Three throws are a special case, I would not like to infer that only one blade was connected to the control rodding for a standard turnout. General practice seems to be that the control rod was connected at the same place as a tie bar in order to control the amount of blade movement and hence the open tip gap. What the Midland specifically did needs someone with more specialist knowledge than I. I know ...
... Keith Attachment: attach_3008_3637_3-throw_1-4.5_version_03.box 86 posted: 13 Apr 2020 10:35 from: Martin Wynne Hi Keith, Are you sure you want a 3-throw? If it was my design I would be doing everything I could to change the track plan to use a tandem instead. Sorry, you lost me with your question about moving the switch. In the classic 3-throw design, each switch consists of one long switch blade, and one short one. Here is the GER drawing of such: 2_280950_180000000.jpg In Templot it would need to be assembled from partial templates. It's doable, but I'm not convinced it could be built reliably in GOG-F. At the very least I would change to 0-MF. Wider than scale model flangeways make it impossible to follow the prototype exactly. (0 -MF and GOG-F can be mixed on the same layout.) Both switches are loose-heel types, certainly the flexible "A" switch which you used for your left-hand switch would never be ...
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