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Turnout on incline with diverging route on decline

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  • Member since
    December 2004
  • From: Bedford, MA, USA
  • 21,442 posts
Posted by MisterBeasley on Tuesday, December 5, 2023 5:23 PM

I would suggest keeping the turnout completely flat and only making level changes well after the turnout.  I had a long Atlas #6 turnout which had a lot of derailment issues.  The problem seemed to be that when my long BLI Hudson locomotive approached the turnout, its long wheelbase caused it to bridge stiffly over the turnout and not follow th track on its way down, thus missing the track on the other side of the points.

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

  • Member since
    July 2006
  • From: west coast
  • 7,642 posts
Posted by rrebell on Wednesday, December 6, 2023 7:49 AM

It really depends on what you want to run, I have done it before but most of my stuff is small.

  • Member since
    January 2023
  • From: Sherwood Park, AB
  • 13 posts
Posted by da29 on Thursday, December 7, 2023 12:26 PM

Zeke

My medium sized layout employs two turnouts on a grade.  In my case I ensured the grade was consistant through the turnout and diverging route for at least 12-18" in all directions.  I operate diesels (GP7/9, RS1) and medium steam locos (2-8-2, 0-9-0) and have no issues.

 

Dwayne A

da29.  the artist formerly known as da1.

  • Member since
    February 2005
  • From: Vancouver Island, BC
  • 23,330 posts
Posted by selector on Friday, December 8, 2023 12:09 PM

On a grade is fine, as suggested, but the vertical easement out of that plane must start about the wheelbase of a steamer away from any changes in elevation...for the diverging route beyond the frog. If you somehow bend a turnout so that it has a hump, effectively, you'll get tracking errors and derailments.  So, turnout flat, approaches as tangential as possible, and don't start a change in elevation after the frog until about a steamer's frame length.

  • Member since
    July 2021
  • 194 posts
Posted by NorthsideChi on Wednesday, December 20, 2023 7:11 PM

Risky design with that turnout.  I think stuff will come uncoupled since all xyz axis are in motion.  Turnouts introduce some turbulence so even the slightest Install imperfections will cause derailment.  

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