RMweb Gold Sandpiper Posted January 25, 2021 RMweb Gold Share Posted January 25, 2021 (edited) Would expansion and contraction of double ended "through" cassettes in a fiddle yard be a problem due to temperature changes? They would only be about four feet six inches long. I don't envisage any problems moving them. They wouldn't need to be turned around and would only need a couple of buffers adding to stop things rolling off the end and then lifting a short distance onto a wall rack. The room doesn't have much in the way of significant temperature changes and doesn't get any direct sunlight. Would expansion and contraction due to temperature changes result in problems slotting them into place without a hammer ( ! ) or leave excessively large gaps at the joins? I have an alternative plan which would work but in the space I have available double ended "through" cassettes would be more convenient. Thanks for any thoughts. Edited January 25, 2021 by Sandpiper Link to post Share on other sites More sharing options...
wirey33 Posted January 25, 2021 Share Posted January 25, 2021 Really depends on the environment your planning on putting them into. Garage or Loft might be a problem. Spare bedroom might not be. They use slip joints in the real world; can you add something along those lines (excuse the pun). Link to post Share on other sites More sharing options...
dasatcopthorne Posted January 25, 2021 Share Posted January 25, 2021 How about a joint like this? Dave 1 Link to post Share on other sites More sharing options...
D1056WesternSultan Posted January 25, 2021 Share Posted January 25, 2021 I have used aluminium angle too. Current is transferred by the bulldog clips which also provide alignment. 1 Link to post Share on other sites More sharing options...
RMweb Gold Fen End Pit Posted January 26, 2021 RMweb Gold Share Posted January 26, 2021 I designed a clamping mechanism for my double-ended cassette fiddleyard. It has proved to work very well in practice. Blog entry covering it is David 1 Link to post Share on other sites More sharing options...
RMweb Gold Dagworth Posted January 26, 2021 RMweb Gold Share Posted January 26, 2021 If you use ally angle cassettes with DCC then cover the upright parts of the angle with gaffa tape or you will get shocks when you try to move the cassette. Andi 1 1 Link to post Share on other sites More sharing options...
RMweb Premium Steven B Posted January 26, 2021 RMweb Premium Share Posted January 26, 2021 Going from -10C to +40C you'll get about 1.5mm of expansion over a 4' 6" length of Aluminium https://www.engineeringtoolbox.com/linear-thermal-expansion-d_1379.html Shouldn't cause a problem. Steven B. 1 Link to post Share on other sites More sharing options...
RMweb Gold Sandpiper Posted January 28, 2021 Author RMweb Gold Share Posted January 28, 2021 Thanks for the responses. Some interesting ideas there. If I actually get started on this proposed layout I can give them a try knowing that the plan will make it fairly straightforward to convert it to something else if they don't work out. Link to post Share on other sites More sharing options...
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