Trains.com

Subscriber & Member Login

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

Radius/Curve Confusion??

1469 views
4 replies
1 rating 2 rating 3 rating 4 rating 5 rating
  • Member since
    February 2017
  • 102 posts
Radius/Curve Confusion??
Posted by JamesNWR05 on Sunday, July 9, 2017 7:33 PM

Hello,

I'm currently putting out some Atlas code 83 track on my 4x8 table just for fun. I'm using 18" and 22" curves to make a double loop- however, something is REALLY confusing me. I'm using the same number of straight pieces along the side of the layout, but when I get to the curves, I have one side where I'm using 3 18" and 3 22", and one side where I'm using 4 of each- and I can't seem to get the two tracks to line up- am I missing something obvious? I'm just really confused with how the curves are acting. Thanks!

  • Member since
    May 2004
  • 7,500 posts
Posted by 7j43k on Sunday, July 9, 2017 8:30 PM

I think an 18" circle uses 12 pieces and a 22" circle uses 16.

That would mean 6 and 8 to do a full 180 degree turnback.

Or 3 and 4 if you're doing "corners".

 

Does that help?

 

 

Ed

  • Member since
    May 2010
  • From: SE. WI.
  • 8,253 posts
Posted by mbinsewi on Sunday, July 9, 2017 9:01 PM

Along with what Ed told you, maybe try putting together the half circles on each end of your 4'x8', and fill in with the straight sections, to connect them.  I think your trying to make two ovals, the outside being 22" radius and the inside 18" ?

I think the straight sections are 9" long?  It might not work out to full straight pieces, you might need a small filler section.

Just a suggestion. 

Mike.

  • Member since
    September 2003
  • From: California - moved to North Carolina 2018
  • 4,422 posts
Posted by DSchmitt on Monday, July 10, 2017 12:27 AM

 double4x8 by Donald Schmitt, on Flickr

I tried to sell my two cents worth, but no one would give me a plug nickel for it.

I don't have a leg to stand on.

  • Member since
    February 2017
  • 102 posts
Posted by JamesNWR05 on Monday, July 10, 2017 3:42 PM

Thanks everyone. This is just what I needed. 

Subscriber & Member Login

Login, or register today to interact in our online community, comment on articles, receive our newsletter, manage your account online and more!

Users Online

There are no community member online

Search the Community

ADVERTISEMENT
ADVERTISEMENT
ADVERTISEMENT
Model Railroader Newsletter See all
Sign up for our FREE e-newsletter and get model railroad news in your inbox!