The curved closure rail in a switch is not a consistent radius. It actually has an easment on both ends. The simple way is to get a full sized drawing and bend the rail to match. You can even get NMRA drawings for HO and enlarge them on a photocopier. I used to use an enlarged version of the drawing that comes with Campbell HO turnout ties.
For some unknown reason, that was way to simple for me. I have a copy of the SP standards for switches, which includes the dimensions for #7 and #9. One of the standards is the separation of the curved closure rail from the straight stock rail. For a #7, for example, at 16'6" the separation is 6"; at 27'3" the separation is 11 5/8"; at 38' the separation is 20 7/8"; and at 48'9" the separation is 34". I lay the straight stock rail first. I precurve the closure rail approximately, then measure these separations as I spike the rail. I made a chart by interpolation and extrapolation for #6, #7, #8, and #9 switches. I have no idea why I bother with this kind of thing. Yes, I did literally count the rivets and reproduce the uneven spacing of them when I built my SF Bx9. -Michael Eldridge -San Jose, CA The poll results are in....... To REPLY to the list, use REPLY ALL, to reply to the sender, use REPLY. I do NOT know if this works on all e-mail software, but it works on some of the most common ones. For those of you on DIGEST mode, all REPLY messages go to the list. Change your membership, change your message settings, use our CALENDAR, view shared files or photos, view the list archives, GO TO http://groups.yahoo.com/group/S-Scale/ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/S-Scale/ <*> 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/
