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On30 Easements

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  • Member since
    March 2014
  • 136 posts
Posted by Fouled Anchor on Friday, March 28, 2014 8:25 AM

Thanks Chuck. More excellent info. I'll play with the easements, as mine are no where near a foot.

 

Thanx

Steve

Life is tough, but it's tougher if your'e stupid.

  • Member since
    February 2005
  • From: Southwest US
  • 12,914 posts
Posted by tomikawaTT on Friday, March 28, 2014 1:39 AM

The narrow gauge lines in the Western US were built using standard engineering practices, including proper spiral easements.  The hurky-jerky ride is more a product of insufficient maintenance than of poor design.

That said, easements for a 35 inch radius could involve a 1/4 inch offset and a total length of about a foot.  Even that will change the sudden head-snap to a smooth transition from straight to curve.

My own prototype, the 42 inch gauge JNR, has trains that run at 90mph on some routes.  Needless to say, I include appropriate easements (10mm offset, 500mm total length) in my construction.

Chuck (Modeling Central Japan in September, 1964)

  • Member since
    April 2003
  • 305,205 posts
Posted by Anonymous on Thursday, March 27, 2014 2:10 AM

Again, we are talking about a narrow gauge line. These were built and maintained on shoestring budgets. Have you ever observed, how bumpy and jerky a ride on a narrow gauge line is? I think that a few bumps and a jerk here and there actually add to the flavor, but beware, this does not mean it should cause derailments.

  • Member since
    September 2003
  • 10,582 posts
Posted by mlehman on Wednesday, March 26, 2014 11:07 PM

With those broad curves, the jerk will be mild. There's no operating reason to have them. On the other hand Charlie is right this does improve appearances.

Mike Lehman

Urbana, IL

  • Member since
    February 2012
  • 596 posts
Posted by charlie9 on Wednesday, March 26, 2014 9:56 PM

easements are always beneficial.  much smoother transition into the curve so you avoid that "lionel" jerk coming and going from straight track.

Charlie

  • Member since
    March 2014
  • 136 posts
On30 Easements
Posted by Fouled Anchor on Wednesday, March 26, 2014 9:21 PM

Guys, my layout is 7x16', and I am running double track around the edges, with 36" radii at the ends.

 

Should I even be considering an easement into the straight track?

 

Steve

Life is tough, but it's tougher if your'e stupid.

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