Templot Club Archive 2007-2020
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posted: 23 Oct 2019 17:39 from: ikcdab
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I have used templot quite a lot and i think i am moderately familiar with its use. Its a great package and hugely useful.A friend has asked me to show him how to template a "tramway point with the turnout road of 8" radius". This is in 4mm so roughly 200mm radius. I can see how to change the crossing angle, the minimum seeming to be 1:4. this is much more than the 8" (200mm) he desires. I wonder if this is possible in templot as i wonder if points like this are prototypical. Maybe what he wants is more set-track. i have little knowledge how street tramways designed their track. Any comments would be useful! Thanks |
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posted: 23 Oct 2019 18:15 from: Martin Wynne
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ikcdab wrote: I can see how to change the crossing angle, the minimum seeming to be 1:4. this is much more than the 8" (200mm) he desires.Hi, The shortest crossing angle in Templot is 1:1.5 Please can you say where you got the 1:4 figure from? There may be an error in the notes somewhere which I need to correct. Templot doesn't know anything about tram track, because neither do I.  The quickest way to create something tram-like is to use a gaunt turnout, and set the gaunt offset to zero: 2_231304_300000000.png  Those settings are at template > gaunt options menu item (bottom of the menu). You didn't specify a track gauge, so I assumed 16.5mm. I then found that a crossing angle of 1:2.38 (curviform) created your desired 8" radius. The .box file for the above is attached below. A gaunt turnout doesn't have a proper switch. Ideally you would create one as a custom switch based on the prototype tram-track drawings. But something could be improvised building on a template such as above. (Note that the line across between the rails marks the start of the curve, not a stretcher bar, which would likely be in the next timber space. Assuming tram tracks have stretcher bars.) cheers, Martin. |
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| Attachment: attach_2931_3532_tram_size.box 120 | |||
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posted: 23 Oct 2019 18:23 from: ikcdab
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Hi Martin, thats very useful.i saw the 1:4 as the minimum selectable from the F6 key, but i now see that there is an "other" option where i can put in what i want. Thank again, much appreciated. |
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posted: 24 Oct 2019 23:15 from: roythebus
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From my observations of tram track, the radius can be quite deceptive. There's been a bit of chat about this on the RMweb in the "modelling tramways" section. Tramway point don't usually have a constant radius, they appear to be like railway points with A,B,C etc switches so they don't go from straight to curve with no transition. Maybe try an A-4 with curviform vee then a transition curve to a sharper radius. The usual turning circle for a typical bus is about 56', 244mm. My opinion is that a tram turning circle would be a bit bigger than that, maybe 1 chain, 66", 284mm. |
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posted: 25 Oct 2019 17:07 from: Andy Reichert click the date to link to this post click member name to view archived images |
"Pdf" Templates for near scale girder rail tram track are at: http://www.proto87.com/Street_track_templates.html These are published in two standards: HO Proto-87 16.5 mm gauge and RTR HO compatible, HO Street Fine. I haven't reviewed them for several years as I've been rather busy making up a full range of DIY kit versions for fellow tram enthusiasts for introduction this year. I'll dig out some pictures and post them shortly. |
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| Last edited on 25 Oct 2019 17:10 by Andy Reichert |
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posted: 25 Oct 2019 19:28 from: Andy Reichert click the date to link to this post click member name to view archived images |
726_251415_330000000.jpg Single 8" radius milled turnout base 726_251425_360000000.jpg  Base with Rail and single points added. 726_251414_250000000.jpg  Full Grand Union milled base, with pavement partially added 726_251416_190000000.jpg  One leaf (1/4) of a Grand Union under construction. Andy |
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posted: 26 Oct 2019 10:52 from: Hayfield
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Wow !!!!!!! | ||
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posted: 26 Oct 2019 12:01 from: Jim Guthrie
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That is excellent. I feel a need to model Glasgow trams again,  |
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posted: 26 Oct 2019 19:23 from: Andy Reichert click the date to link to this post click member name to view archived images |
I did put an early test running video on the Video of the Week Topic . Templot message ref: 27903 Andy |
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posted: 26 Oct 2019 19:29 from: Martin Wynne
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Andy Reichert wrote: I did put an early test running video on the Video of the Week Topic . Templot message ref: 27903 Hi Andy, See: video full screen click here topic 3505 - message 27903 Martin. |
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