Yes, interesting stuff! Thanks, Dave!
--- On Sun, 8/28/11, ctxmf74 <[email protected]> wrote: From: ctxmf74 <[email protected]> Subject: {S-Scale List} Re: "Pine Strip" turns To: [email protected] Date: Sunday, August 28, 2011, 10:39 PM --- In [email protected], Charles Weston <rotary-oy@...> wrote: > > The real railroads actually do use circular curves, just with transitions at > the ends. > If you take a look at a large scale topo map, or even Google or Bing maps, > it's apparent that railroad curves are circular. The SP valuation maps of the branch line here show the centerline radius and deltas. It was interesting to see that the curves were compound curves instead of spiral eased single curves. The first "easement" segment might be 3 or 4 times as large a radius as the body of the curve. I don't have any here to look at but it might be something like a 2000 foot radius for a couple hundred feet then a 700 foot radius for the body then another 2000 foot radius transition to the tangent. From hanging out with the section gangs as a kid I know that no matter what the radius they line everything fair by eye as they spike the rails so they in effect use the rails as their batten. I can still picture old "Camel" the section boss down on his knees sighting the line and telling the boys a bit right or a bit left as they pried it fair with their big bars....Dave Branum [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/
