Templot Club Archive 2007-2020
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posted: 27 Jun 2008 17:22 from: Martin Wynne
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This link has just been posted on another group. Some excellent detail pictures of narrow-gauge pointwork: http://www.railroad-online.de And while on the subject, a reminder of this link (metre gauge pics): http://www.polier.ch/page/reportage/rep21/rep21.htm regards, Marin. |
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posted: 27 Jun 2008 18:01 from: Jim Guthrie
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Martin Wynne wrote: This link has just been posted on another group. Some excellent detail pictures of narrow-gauge pointwork:Martin, It's interesting to note the height of the check rails at the "K" crossings on the slip. I can only assume this was done to extend the chord of contact on the back of wheels - especially small diameter ones - and stop them going wrong road. I've sometimes thought that that might be a tweak we could do on our UK style diamond crossings by raising the "K" crossing check rails a bit. It would almost be unnoticeable, but could be a bit of a PITA at track cleaning  Jim. |
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posted: 27 Jun 2008 18:25 from: Martin Wynne
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Jim Guthrie wroteIt's interesting to note the height of the check rails at the "K" crossings on the slip. I can only assume this was done to extend the chord of contact on the back of wheels - especially small diameter ones - and stop them going wrong road. I've sometimes thought that that might be a tweak we could do on our UK style diamond crossings by raising the "K" crossing check rails a bit. It would almost be unnoticeable, but could be a bit of a PITA at track cleaningHi Jim, See also: http://www.rmweb.co.uk/forum/viewtopic.php?p=366605#p366605 Prototype K-crossings with raised check rails are in the UK now. They are causing problems for running long-wheelbase heritage steam locos with flangeless driving wheels, which have to be banned from such routes. The problem is that a set of flangeless wheels can move sideways and hit the raised portion. The same problem would arise for models, in fact the increased axle sideplay would make it more likely.  The best answer for model problems with K-crossings is to change to a switch diamond!  p.s. I think the slip in that link is standard gauge! I wrote the subject line after looking at the D&RGW pics. Sorry for any confusion. regards, Martin. |
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