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... is blunted back from the FP gauge intersection to a nose width of 3/4" (GWR 11/16", FB 5/8 "). Here's an excellent pic from Mick Nicholson showing an almost new bullhead crossing. You can see how the vee nose has been blunted back from the intersection, and also profiled down below the level of the wing rails to match the coning angle on the wheels. The nose is always over the A timber and enclosed within the built-up A chair and spacers: 2_270449_340000000.jpg© Mick Nicholson regards, Martin. posted: 12 Mar 2010 17:51 from: Paul Boyd Hi David Doesn't everybody? Apparently not, and I'm not at all sure that I made a better job than you did! Something to aim for here, methinks. That crossing nose chair- I know C&L do one in brass but unless there's some odd colour rendering yours looks likes like resin. Is it? Cheers posted: 14 Mar 2010 11:37 from: Phil O Martin Wynne wrote: David ...
... that the holding-down bolt is not used with REA slab& bracket chairs. Note also the 4" dimension is on that drawing from the blunt nose to the "A" bolt. Except non-REA designs on the GWR/ BR(W) where the holding-down bolt is used with slab& brackets (and the blunt nose is 11/16"), but where the "A" timber is always 14" wide, so the slab can be placed further back. Here some pics: 2_270449_340000000.jpg REA (Non-GWR). Centre of brackets and bolts on centre-line of timber. No holding-down bolt. The blunt nose certainly looks closer to the edge of the timber than 2", but on the other hand it also looks narrower than 3/4 ", so this may be a modern revision with 5/8" nose as FB (on a new bullhead crossing with 12" timbers). 2_121258_410000000.jpg 2_121355_050000000.jpg GWR. With holding-down bolt. On 14" timber. 14 ...
... knuckle, which looks awful and is entirely unnecessary, and looks nothing like the picture above. ** Well worth replicating in he model, for much smoother running. Here I have added the gauge lines in yellow, and you can see that the vee nose is blunted back from the gauge intersection (fine point, FP), and taken down below the level of the wing rails. Only a few thou is necessary in the model to reproduce this, but it can make a big difference in the running quality: 2_270449_340000000.jpg regards, Martin. posted: 6 Apr 2011 00:01 from: Rob Manchester Hi Martin, Thanks for the reply and the pictures. I am making sure that my vees are blunt enough and drop down slightly below wing rail level to give the wheels a smoother ride. BTW I stopped off at the SVR on the way back from taking the mother-in-law to lunch the other day. A small prarie was doing the honours on the passenger runs. First time this year I have smelt the real ...
... Here is a selection of them, all showing that the knuckle bend usually comes between the timbers: 2_200703_340000000.jpg 1679_261346_230000004.jpg 1679_261331_320000002.jpg 1679_261331_240000001.jpg On this pic below from Mick Nicholson I added yellow lines to show the relationship to the gauge-faces, the blunt nose on the vee, and the way the vee top is taken down below the level of the wing rails to allow for the coning angle on the wheels. In this pic the knuckle bend is closer to the timber than in the above pics because the crossing angle is flatter: 2_270449_340000000.jpg Many thanks to those members mentioned for uploading these. regards, Martin. posted: 20 Mar 2014 17:01 from: Ian T Thanks Martin, I now understand. I am about to start building my first crossing and I didn't want to start off on the wrong foot but you have cleared up my misunderstanding. regards, Ian Parts of Templot Club may not function unless you enable JavaScript (also called Active Scripting) in your browser. Templot Club> Forums> Trackbuilding topics> Turnout Timbering about Templot Club Templot ...
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