... large and I can visualise wheels dropping in the gap*. No problem, as I can soon substitute 1:7 or 1:8 crossings. Hi Gordon, No, don't do that. If you want 1:10, build 1:10. But make them switch-diamonds with movable K-crossings. Here's a couple of images to help explain. These are diamond-crossings, but you can add slip roads to make them into slips, just as for fixed K-crossings: switch_diamond_10bh.jpg© PWI switch_diamond.jpg© PWI Notice that in a flat-bottom switch-diamond (lower photo) the switch tips (points) are carried on two separate timbers. In a bullhead switch-diamond (upper drawing) both switch tips share a common wider centre timber. *If you use the proper width wheels for 00-BF they can't "drop" into the gap. But they can, and will, take the wrong road on fixed K-crossings of very flat angle. Using movable K-crossings for flat angles ...

... 8, and would be extremely unreliable if modelled as such. Switch-diamonds (movable K-crossings) are used instead, and Templot draws them as such, like this: fb_movablek_dslip.jpg© thanks to Mick Nicholson An excellent picture from Mick Nicholson showing a flat-bottom double-slip with movable K-crossings. Templot is drawing a switch-diamond instead (i.e. movable K-crossings) because that is what is required at this angle. Here are a couple of images to help explain: switch_diamond_10bh.jpg© PWI switch_diamond.jpg© PWI regards, Martin. posted: 16 May 2012 01:06 from: Andrew Fendick Thanks very much for that information Martin. Sorry to have troubled you. posted: 16 May 2012 07:08 from: Stephen Freeman Hi, A small point but the timbering appears to be slightly different from Bullhead to Flatbottom. Does Templot correct this or is some timber manipulation called for? posted: 16 May 2012 13:07 from: Martin Wynne Borg-Rail wrote: A small point but the timbering appears to ...

... :13 from: Martin Wynne CoBo wrote: What is and how do I build a 'switched crossing'? Hi Mike, Did you mean a "switch-diamond"? Here are a couple of images to help explain.These are switch-diamond-crossings (i.e. they have movable K-crossings), but you can add slip roads to make them into slips, just as for fixed K-crossing diamonds. The two sets of moving switch blades at the centre always move together, in opposite directions: switch_diamond_10bh.jpg switch_diamond.jpg Notice that in a flat-bottom switch-diamond (lower photo) the switch tips (points) are carried on two separate timbers. In a bullhead switch-diamond (upper drawing) both switch tips share a common wider centre timber. Here is a switch-diamond in early FB track at Bilton Junction, clamped out of use. Photo thanks to Mick Nicholson: 2_221106_110000000.jpg Here is an excellent picture from Mick Nicholson showing a flat-bottom double-slip with movable K-crossings. As one switch blade ...