Templot Club Archive 2007-2020
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posted: 15 Nov 2009 21:39 from: phileakins
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Hi Folks I am attaching the latest incarnation of Blue Town, which bears a passing resemblance to Sheerness Dockyard (LCDR) post the 1883 trackwork revamp, condensed into 12 feet X 3 feet space in S7. There is a three-way tandem (they seem to be in fashion at the moment, although I've taken heed of all the advice) I need to finish - its just overlayed right and left hand templates at the moment. When I get everything just right I'll put the V crossings in the right place and play with partial templates to produce the definitive template. However - I cannot get my head around the alteration of checkrail lengths, shortened or lengthened! There are several place where check-rails should seamlessly merge through turnouts and crossovers, but I get hopelessly lost in the various acronyms and options, so that anything I produce is actually by guesswork and accident. Can someone help me though this please? Thanks. Phil PS Surprisingly, shoving timbers is actually quite a restful task. |
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| Attachment: attach_688_972_blue_town_1883_09_11_15_2055_51.box 218 | |||
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posted: 16 Nov 2009 06:39 from: Stephen Freeman
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Hi, I make no comment on y our radii but the attached template should help with your question |
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| Attachment: attach_689_972_3way_tandem_turnout_09_09_23_1744_52.box 249 | |||
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posted: 16 Nov 2009 17:19 from: phileakins
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Borg-Rail wrote: Hi,Thanks Borg-Rail, that'll be a great help when I get to work on the final template. The point is only going to be used by loco's (0-6-0 and 4-4-0/0-4-4 plus an 0-4-2, nothing more exotic) and freight stock, so the radii should be sufficient. The design is driven by how the available space is divided unfortunately. Phil |
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posted: 16 Nov 2009 22:45 from: Martin Wynne
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phileakins wrote: There are several place where check-rails should seamlessly merge through turnouts and crossovers, but I get hopelessly lost in the various acronyms and options, so that anything I produce is actually by guesswork and accident.Hi Phil, The check and wing rail dimensioning is a major headache. I've had 3 goes at it in different versions, and I'm still not happy. The problem is that Templot needs the REA defaults and has to be able to make sensible changes to the dimensions when the crossing angle is changed. The position of the check rails also has to change when swapping from equalized (skewed) timbering to the square-on style. At the same time, when using partial templates you want to override all that and set each dimension independently. The difficulty is that there is a lot of them -- 6 dimensions for each check rail and 3 for each wing rail. That's 18 separate dimensions for the wing and check rails in an ordinary turnout template. I have tried to reduce that and group some together, to make setting them all less daunting. But it's still a mess. I'm going to re-work the whole thing yet again in the next upgrade, and make most of it adjustable visually by mouse action, instead of setting dimensions. That's 18 new mouse actions -- all needing a user interface and shortcuts! In the meantime, here is a diagram explaining the current terminology. Everything is referenced from the centre of the "A" timber -- the one supporting the nose of the vee: check_wing_rails.png  It is in fact all explained in the F1 Help notes in the program -- here they are again: Wing Rails and Check Rails ( Guard Rails ) The wing rails are the short lengths of running rail with bent extensions which lie alongside the nose of the crossing vee. The wing rail "reach" length is measured from the centre of the "A" timber (the timber bearing the nose of the vee) to the free end of the wing rail. (To set the wing rail "front" length from the rail joint to the "A" timber, click the REAL > CUSTOMIZE V-CROSSING > WING RAIL FRONT ... menu item.) The check rails (guard rails) are the short lengths of rail fixed alongside the opposite running rail to prevent the wheels from taking the wrong path at the nose of the crossing. For dimensioning purposes the overall length of a check rail is divided into two component lengths, named "working length" and "extension length". The check rail "working" length is measured from the position where it crosses the centre-line of the "A" timber, to the near end of the check rail (the end which is nearer to the switch) (point blades). The check rail "extension" length is the remaining length from the "A" timber to the far end of the check rail. Templot uses 2 sizes of wing rail reach length, 3 sizes of check rail working length and 2 sizes of check rail extension length, according to the V-crossing angle. These sizes are preset in increasing lengths, but can be set to be all the same, or to any desired lengths. Here is a summary of the way these sizes are used according to the current crossing angle: V-crossing check rail check rail wing rail angle: working length: extension length: reach length: under 1:6 size 1 size 1 size 1 1:6 to 1:10 size 2 size 1 size 1 over 1:10 to 1:12 size 2 size 2 size 2 over 1:12 size 3 size 2 size 2 In the majority of cases, the check rail extension length is the same dimension as the wing rail reach length, so that the far end of the check rail is aligned with the end of the wing rail, but this can be changed as necessary by entering the appropriate dimensions. These dimensions for the wing and check rails should be entered in full-size prototype INCHES and apply to the main-side (MS) wing rail and check rail (in the main-road of the turnout). The turnout-side (TS) wing rail (in the turnout-road) can be made longer or shorter than the main-side wing rail by setting a non-zero dimension for the turnout-side wing rail reach length modifier. The turnout-side (TS) check rail working length can be made longer or shorter than the main-side check rail working length by setting a non-zero dimension for the turnout-side check rail working length modifier. The turnout-side (TS) check rail extension length can be made longer or shorter than the main-side check rail extension length by setting a non-zero dimension for the turnout-side check rail extension length modifier. Be aware that because the check rails are linked to the "A" timber, the position of the check rails will change when changing the style of timbering (EQUALIZED, SQUARE-ON, or ANGLED-ON). But their position is NOT affected by any TIMBER SHOVING which is applied to the "A" timber. For specific information about each dimension, click the ? HELP flag on each line or press the F2 key. I will write separately about how these settings can be used in partial templates, and how to merge short check rails into one long one. But I shall have to assume you are familiar with the above.  regards, Martin. |
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posted: 17 Nov 2009 11:34 from: phileakins
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Thank you very much indeed for that Martin. I've had some experience with programming and I don't envy you a bit mate! I read somewhere that you are using Pascal - the language I cut my (development) teeth on and is still my favourite. The diagram you have posted, worth more than a thousand words, puts the contents of the help file (which I did read) into context for me, and very probably, for others as well. I look forward to your next installment. Many Thanks for the trouble you have taken. Phil |
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posted: 19 Nov 2009 17:26 from: phileakins
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Armed with Martin's diagram I have now gone through the check/wing rail options with a much greater degree of understanding and confidence, and have successfully extended both in a number of places so that the check rails flow as they should. The result is attached for your comments. Thanks again Martin, the diagram was the key! Phil [Edit to attach a much better .box file!] |
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| Attachment: attach_692_972_blue_town_1883_09_11_20_2153_31.box 240 | |||
| Last edited on 20 Nov 2009 22:08 by phileakins |
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