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Atlas turnouts

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  • Member since
    September 2006
  • From: Wayne County Michigan
  • 678 posts
Atlas turnouts
Posted by dale8chevyss on Tuesday, December 20, 2011 6:53 PM

I also use atlas turnouts for their $$ and they typically work well enough for me for my layout.  I've got a question regarding one in particular. 

 


I want to instal a right hand straight turnout on a 22" curve yet maintaining the curve.  Would I need a #4 or something broader? Need to mention it's HO.

 

Thanks

 

 

Modeling the N&W freelanced at the height of their steam era in HO.

 Daniel G.

  • Member since
    October 2004
  • From: Colorful Colorado
  • 8,639 posts
Posted by Texas Zepher on Tuesday, December 20, 2011 7:50 PM

dale8chevyss
I want to instal a right hand straight turnout on a 22" curve yet maintaining the curve.  Would I need a #4 or something broader? Need to mention it's HO.

Well, first Atlas turnouts do not maintain a constant curve.  It is best to determine where the turnout is to be and calculate the constant curve on both sides of it.  Second, if the turnout was a constant curve I believe a smaller # would be needed rather than a larger one.  Remember Altas custom line #4 turnouts are actually closer to #5s than they are to a real #4.    If you really want a continuous radius through a turnout look to the Peco short turnouts.  They have the European style curve of 24" through the turnout.

  • Member since
    June 2003
  • From: Culpeper, Va
  • 8,204 posts
Posted by IRONROOSTER on Tuesday, December 20, 2011 8:17 PM

Atlas has come out with a snap switch 22" curve in code 83.  If you're not using code 83 you could probably fit it in anyway with a little shimming or transition joiners.

Using a numbered turnout will require altering your curve.

Enjoy

Paul

If you're having fun, you're doing it the right way.
  • Member since
    December 2004
  • From: Bedford, MA, USA
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Posted by MisterBeasley on Tuesday, December 20, 2011 8:19 PM

Atlas makes a code 83 snap switch with a 22-inch curve for the diverging path.  There is still a short straight section leading into the points, but you could cut that off and have pretty much a pure 22-inch curve, if that's what you want.

It takes an iron man to play with a toy iron horse. 

  • Member since
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  • From: Dearborn Station
  • 24,280 posts
Posted by richhotrain on Thursday, December 22, 2011 4:49 AM

Dollars aside, why not just use a curved layout which is designed for such purposes?

It will maintain the desired curve without the risk of kinks and resulting derailments.

Rich

Alton Junction

  • Member since
    December 2005
  • From: Spanaway, WA
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Posted by SMassey on Thursday, December 22, 2011 3:47 PM

I found that the #6 curout transitions better into a 22" or 24" radius curve.  The Custom Line series are not really curved on the diverging rail.  The snap switches do have a curve to them that are right about 18" radii unless you get the Code 83 snap switch disctibed above.

 

Massey

A Veteran, whether active duty, retired, national guard, or reserve, is someone who, at one point in his or her life, wrote a blank check made payable to "The United States of America" for an amount of "up to and including my life."

  • Member since
    December 2007
  • 993 posts
Posted by hobo9941 on Friday, December 23, 2011 8:42 PM

I just got the Walthers sale flyer today, and they have a bunch of curved turnouts in it. Big track sale. I have two curved turnouts on my layout, that I have had no problems with. I don't remember who made them. The Atlas Code 83 Curved Turnout says #7. Not sure what radius that would be. They have some others in the sale flyer, but they apparently are code 100 or code 70.

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