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... managed to break any chairs when inserting the rails in quite a while. Cheers! Andy Rob Manchester wrote: Hi Andrew, Hope you are keeping well. Here is the Tillig HO approach to flexible turnout bases. 2001_301532_390000000.jpg I used them many years ago and they assemble well although they were a little fragile. No sure if you could use the wavy web design in a material suited to 3D printing. Rob posted: 30 Apr 2020 21:24 from: Martin Wynne Hi Andy, Rob, I tried flexible webbing: 2_262143_460000000.png That design was intended to make them more accessible for cutting away before ballasting, than having them under the rails. Also the angle makes it possible for the thickness of a knife blade to flex the web away from the timber without disrupting the position of the timber. In practice they proved far too flexible (in toughened PLA), and difficult to hold in line while threading rail. Sorry no photos, it all went in the bin. cheers, Martin. posted: 30 Apr 2020 23:40 from: ...
... webs). 2. the panel is flexible for curving, and will hold the sleepers square to the curve. 3. the intersection of the web ribs makes it easy to follow a drawn centre-line when tracklaying, 4. it is easier to ballast over the webbing if desired than when it is under the rail. This scheme is unlikely to work for more complex track formations having partial templates and shoved timbers. For those I think I shall implement a means to draw the required webbing on the screen manually. 2_262143_460000000.png Here it is without rails, ready for printing: 2_262159_130000000.png Some companies which used the wider 12" joint sleepers also used wider joint chairs on them. But not all, the ordinary S1 chairs look ok on them (as above). So I think I will leave joint chairs for another day. The L1 bridge chairs are calling me. cheers, Martin. posted: 27 Nov 2018 19:33 from: Rob Manchester Hi Martin, Excellent design. All 4 reasons for the 'odd' webbing sound valid to ...
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