Templot Club Archive 2007-2020
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posted: 27 Jan 2015 09:36 from: Godfrey Earnshaw
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This is just a little something that keeps puzzling me. If I create a new turnout it appears to always be formed with a "regular" V crossing. If I curve the turnout it maintains the same "regular" V crossing. If I "insert" a turnout in an existing length of plain curved track it creates a turnout with a "regular" V crossing. My instincts tell me that at some point a "curviform" V crossing would be more suitable. So my question is "when and why" would I use a "curviform" crossing? |
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posted: 27 Jan 2015 09:50 from: Godfrey Earnshaw
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Sorry guys just found the answer from a Mr Martin Wynne. Posted 28 April 2010 - 04:05 http://www.rmweb.co.uk/community/index.php?/topic/14277-crossing-vees-on-curved-points/ |
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posted: 27 Jan 2015 23:03 from: Martin Wynne
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Godfrey Earnshaw wrote:If I "insert" a turnout in an existing length of plain curved track it creates a turnout with a "regular" V crossing.Hi Godders, Not necessarily. When you insert turnout in plain track you get back the turnout which was there when you did convert turnout to plain track. It may have had any type of V-crossing. This can sometimes catch you out. It's easy to see from the template which type of V-crossing is present: regular = turnout curve end marker is not at the FP intersection (marker is at CESP peg position) generic = turnout curve end marker is at the FP intersection curviform = no turnout curve end marker shown 2_271750_430000000.png  For regular V-crossings the position of the marker can be adjusted using SHIFT+F11 mouse action. This changes the lead length of the turnout without changing the crossing angle, which can be useful in some situations. My instincts tell me that at some point a "curviform" V crossing would be more suitable. So my question is "when and why" would I use a "curviform" crossing?When the track geometry requires that the turnout curve continues beyond the V-crossing. That might be: in some double-junctions in curviform ladders in yards and sidings where you want tracks to diverge quickly to save space very often in cases of contraflexure (Y-turnouts) and many other cases, but not usually in ordinary double-track crossovers. More about all this in screen 36a and screen 37 at the top of this page: http://templot.com/martweb/tut5e.htm • Note that is a very old tutorial and "curved crossing" is now called "curviform crossing". This is a name change only, the function and meaning is unchanged. regards, Martin. |
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posted: 27 Jan 2015 23:33 from: Chris Copplestone click the date to link to this post click member name to view archived images |
Hi Martin, you said: "For regular V-crossings the position of the marker can be adjusted using SHIFT+F11 mouse action. This changes the lead length of the turnout without changing the crossing angle, which can be useful in some situations." It certainly is! I have been struggling for the last few hours trying to get a conductor rail to match the the turnout stock rails on four C10 curved turnouts in a scissors crossover. I was trying to follow the instructions in message 14890 without luck. However, simply copying the turnout, changing the gauge to 28.35, aligning the datum pegs on the turnouts using the notch and then using Shift+F11 to align the turnout centre-lines gives a perfect result! Many thanks  Regards Chris |
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