John, I have found that Acrylic latex caulk PLUS silicone (DAP alex, for 99cents at home depot) works perfect for securing the cork roadbed i use. I generally spread caulk at a rate of about 1ft/s for each side of the roadbed (not sure it tomalco roadbed is one or 2 piece) but don't waste my time spreading it ut. Afterwards i tape it down with masking tape and take some flextrack to make sure i am happy with the roadbed, making adjustments as necessary. I suspect suring time is 18 hours to FULLY dry, but you only have about 1 hour after application to move it around. A final word of advice, don't solder over the foam, I learned the hard way.
Jeffrey Ngowe -----Original Message----- From: johnmwalker <[email protected]> To: S-Scale <[email protected]> Sent: Sat, Jun 4, 2011 8:08 am Subject: {S-Scale List} SAF (not FNF) and extruded polystyrene Greetings colleagues, Because of heavy seasonal 1:1 scale railroad work commitments, my 1:64 railroad progress is limited to 2-3 Saturdays per month, sad to say. For my eight hours of SMF + SAF (figure that acronym out for yourselves) I've just finished rearranging my modular tables on my layout. It remains 5.44 m wide (that is 18' plus a few inches). Depth will vary but at no point will I need to reach beyond 70 cm module width. I did all of this at the last moment - i.e., before finalizing my track plan - because I was unsatisfied with the minimum radii. Until today they were as tight as 31", which looked a bit toylike. I've now increased minimum radii to roughly 42" and it is usually 45" (excluding freight yards of course, where things are tighter).The new modules 'collapse' wherein the gap between the modular tables disappears when not operating, and I will be able to install the turntable of my dreams on the southeastern corner (more on that as this progresses). Where I could use some advice is on the foam. I can get extruded polystyrene panels from my lumber years (the brand is called 'Ursa' as in bear) but no one around here models with it. The fellow at the depot thinks I am missing a couple of software upgrades, thanks to the bizarre purchases I've made in recent weeks, to wit: "do you REALLY want to cut the panels like that? ...do you REALLY want legs that high? and so on). I plan to get foam panels into which I'd carve streams and a river. Atop of the panels will be Tomalco 60 degree trackbed. The blue and pink foam panel brand names most of you speak of are unavailable here, hence the Ursa extruded polystyrene. Am I going the right way with this material composition? Any suggestions on affixing roadbed to foam? Thanks in advance and best Regards from Hombrechtikon, Switzerland. John M Walker P.S. In case anyone has not yet purchased Tomalco flex track, I can recommend the brand highly: these products are beautiful out of the box. [Non-text portions of this message have been removed] ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/S-Scale/join (Yahoo! ID required) <*> To change settings via email: [email protected] [email protected] <*> To unsubscribe from this group, send an email to: [email protected] <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/
