T30RRA Posted June 6, 2021 Share Posted June 6, 2021 My first hour saw the first two boards screwed together and the well inserts dry fitted, a light sand to the edges is required before taping and gluing into place. Link to post Share on other sites More sharing options...
gismorail Posted June 7, 2021 Share Posted June 7, 2021 this looks interesting any further detail about this construction ...is it a kit or scratch build please ? Link to post Share on other sites More sharing options...
T30RRA Posted June 7, 2021 Author Share Posted June 7, 2021 It's a midland railway centre kit, no longer produced. Thanks. Link to post Share on other sites More sharing options...
gismorail Posted June 7, 2021 Share Posted June 7, 2021 Thanks will follow your progress 1 Link to post Share on other sites More sharing options...
T30RRA Posted June 7, 2021 Author Share Posted June 7, 2021 Glued the floor in for the well now. Had to slim one of the ply bits down to get it all to fit. 2 Link to post Share on other sites More sharing options...
T30RRA Posted June 13, 2021 Author Share Posted June 13, 2021 That's the joints glued with PVA the next step will be to get the race rail in place. 3 Link to post Share on other sites More sharing options...
T30RRA Posted July 18, 2021 Author Share Posted July 18, 2021 Does anyone know what spacing the chairs of the race rail should be at? Link to post Share on other sites More sharing options...
T30RRA Posted July 18, 2021 Author Share Posted July 18, 2021 kind of answered my own question. 70ft real dia. divided by 43.5, gives 490.423 once converted to mm, divided by 360 degrees is 1.3622mm per degree so 4 degrees is 5.449 or 5.45mm spacings nearest damn it. Link to post Share on other sites More sharing options...
daifly Posted July 18, 2021 Share Posted July 18, 2021 (edited) You might want to revisit your flawed mathematics! The scale of the error in your calculation has been calculated to over 50 trillion places of decimals! Dave Edited July 18, 2021 by daifly 1 Link to post Share on other sites More sharing options...
T30RRA Posted July 18, 2021 Author Share Posted July 18, 2021 50 minutes ago, daifly said: You might want to revisit your flawed mathematics! The scale of the error in your calculation has been calculated to over 50 trillion places of decimals! Dave So what should the spacings be? I could very easily be wrong, trying to work out a formula that I don't normally use late at night is not a great idea. Link to post Share on other sites More sharing options...
daifly Posted July 19, 2021 Share Posted July 19, 2021 The approximate length of the race rail is pi*d. So, for a 70" diameter turntable, (the race rail is not quite at the extremity so the diameter of the race rail will be slightly less) the circumference is pi*70' on the prototype. For a 7mm scale model, this becomes pi*70*12(inches)*25.4(inches to mm)/43.5(scaled). That's 1540mm. With a chair every 4deg as you propose, that's 17.11mm chair centres not 5.45mm! Dave 1 Link to post Share on other sites More sharing options...
T30RRA Posted July 19, 2021 Author Share Posted July 19, 2021 2 hours ago, daifly said: The approximate length of the race rail is pi*d. So, for a 70" diameter turntable, (the race rail is not quite at the extremity so the diameter of the race rail will be slightly less) the circumference is pi*70' on the prototype. For a 7mm scale model, this becomes pi*70*12(inches)*25.4(inches to mm)/43.5(scaled). That's 1540mm. With a chair every 4deg as you propose, that's 17.11mm chair centres not 5.45mm! Dave Thanks. The 4 degrees came from someone else on here who was building one. I appreciate the help. Link to post Share on other sites More sharing options...
T30RRA Posted July 20, 2021 Author Share Posted July 20, 2021 Pretty good effort tonight. The other half then I need to do the bridge as the upper board needs checking against the bridge prior to fixing in place. 1 Link to post Share on other sites More sharing options...
T30RRA Posted August 23, 2021 Author Share Posted August 23, 2021 This is what I have been up to tonight, still more spacers to add before the stiffening angles get rivetted and added. 1 Link to post Share on other sites More sharing options...
gismorail Posted August 24, 2021 Share Posted August 24, 2021 Coming on nicely I have to admire your patience not an easy thing to build Link to post Share on other sites More sharing options...
T30RRA Posted August 24, 2021 Author Share Posted August 24, 2021 1 hour ago, gismorail said: Coming on nicely I have to admire your patience not an easy thing to build The instructions take a bit of reading, that's for sure and the M2 nuts are often awkward to tighten up. Link to post Share on other sites More sharing options...
T30RRA Posted September 28, 2021 Author Share Posted September 28, 2021 Tonight's session complete. Race rail finished and now I can do the hard bit and finish building the bridge/ deck. 2 Link to post Share on other sites More sharing options...
RMweb Gold RedgateModels Posted September 29, 2021 RMweb Gold Share Posted September 29, 2021 This just came up on eBay if anyone else wants a kit .... https://www.ebay.co.uk/itm/403195509154?_trksid=p2485497.m4902.l9144 Link to post Share on other sites More sharing options...
T30RRA Posted September 29, 2021 Author Share Posted September 29, 2021 3 hours ago, RedgateModels said: This just came up on eBay if anyone else wants a kit .... https://www.ebay.co.uk/itm/403195509154?_trksid=p2485497.m4902.l9144 That doesn't include the race rail, well or installation module though I don't think 1 Link to post Share on other sites More sharing options...
JeffP Posted October 1, 2021 Share Posted October 1, 2021 Correct. It's the turntable bridge only. Link to post Share on other sites More sharing options...
T30RRA Posted December 30, 2021 Author Share Posted December 30, 2021 Marked out one side of the the turntable bridge for strengtheners (blue lines) and walkway supports (red lines), marked the end of the winding platform as the measures are different and then started adding the strengtheners which takes a bloody long time 2 Link to post Share on other sites More sharing options...
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