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> Corridor connections, A possible improvement
Robert Stokes
post 31 Oct 2012, 18:34
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About this time last year there was a discussion about corridor connections for 00 scale main line carriages. Here is a link to that thread
http://www.modelrailforum.com/forums/index...amp;hl=corridor

In it Brossard showed how to make some paper corridor connections for those that don't want to buy them. I have devised what I think is an improvement to that design. The important difference is that mine inter-leave at two positions rather than one. I have taken some pictures showing a demonstration one which is twice scale size made from white lining paper because I think that will photograph better. For my old Airfix coaches I used a height of 28mm, width at the middle of 15mm and folds of 7mm but it may be different for others. The width and height should be about 2mm more than the hole at the end of the coach.

First it is important to say that these connections are only suitable for fixed rakes. This is because I do not attach a part to the end of each coach. My connections are designed to be a spring fit between two coaches which are left coupled permanently. For each connection you make two pieces of paper to the following design. You will see that I have shown 11 folds either side of the middle but this could be reduced to 9 or 7 especially if your coaches are close-coupled.



The solid lines are cuts and the dashed lines are folds. Although shown as dashes it is better if they are drawn solid with a sharp H or 2H pencil to make folding easier. Since the alternate folds go opposite ways you might like to draw some of the lines on the reverse of the paper. I found it best not to make the half cuts until after doing the folding and then straightening out again. If you are making several of these connections it is easiest to mark up a few below one another before cutting out. The lines can then be drawn across them all in one go. Here are two double size ones ready.



Turn one upside down and begin inter-leaving them. At this stage only work the leaves into one another just past half way to get them like this.



Now make the thing into a loop and begin inter-leaving the other side. Again only go just past half way to get to this stage.



Now work the two halves together until the half cuts meet in the middle. This stage can be fiddly and you must check frequently that leaves aren't catching and bending backwards. The result should look like this. Edit - sorry this ones a bit out of focus.



You now press the folds together tightly to make it look like this. When fitted the folds will be even tighter.



You now glue to each end small pieces of card which are very slightly smaller than the hole at the end of each coach which appears when you remove the moulded rubber or plastic ones originally fitted. These pieces of card locate the connector between the coaches. If you have used the right number of folds it compresses to look a reasonable representation of a gangway connection (in my opinion anyway). Here is a picture of small black ones fitted on a train with a close up of one to follow.





I know that professionally made ones aren't too expensive but these are suitable for anyone on a tight budget or someone who likes making things rather than buying them if possible. I think this design is only appropriate for 00 gauge as I suspect that making them for N-gauge would be just too fiddly and that they wouldn't have enough detail to look good for O gauge.


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dwb
post 31 Oct 2012, 20:12
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Very nicely done thumbsup.gif

David


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barrymx5
post 31 Oct 2012, 20:15
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Thanks Robert. Looks very good. Any advice on type/thickness of paper? How about 80gm copy paper?


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beeman
post 31 Oct 2012, 20:30
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Thanks Robert ,useful post. I tried simple concertina types but found I needed to make a Zed type 'jig', just a piece of folded metal held in the vice and 'folded' over the other end in an attempt to get the folds uniform. Have you found if they will negotiate R1 S curves, of which I have some. ohmy.gif Saved your suggestions with a view to trying Thanks. Beeman.


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Robert Stokes
post 31 Oct 2012, 20:47
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Thank you for the replies.

Barry, I use black paper from a craft shop. I think it is 160g per square metre. I don't know its thickness but it is definitely thicker than the paper I use in my printer.

Beeman, my minimum radius is about 900mm or 30in so I've no idea what it will do on set-track curves. It's very flexible so might be all right.

Robert


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My layout "Horton-cum-Whinton" is 1950's midland region with Settle and Carlisle flavour.
http://www.modelrailforum.com/forums/index...8&hl=Horton

My replacement for the above layout.
http://www.modelrailforum.com/forums/index...c=29381&hl=
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Anthony566
post 1 Nov 2012, 00:00
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OMG was that really that long ago .... I remember buying the ebay ones and posting some images lol smile.gif


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theakerr
post 1 Nov 2012, 21:40
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Very nice. I really like the effect of the double cut. Back in the day when I was a bit younger I made something similar using Graph Paper (What is that you may ask) because all the lines were pre printed and used Indian ink to colour. Indian ink does not cause the paper to go brittle.
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Robert Stokes
post 1 Nov 2012, 22:40
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As a retired mathematics teacher there's not much I don't know about graph paper and its uses.

Robert


--------------------
My layout "Horton-cum-Whinton" is 1950's midland region with Settle and Carlisle flavour.
http://www.modelrailforum.com/forums/index...8&hl=Horton

My replacement for the above layout.
http://www.modelrailforum.com/forums/index...c=29381&hl=
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