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Reverse loop

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  • Member since
    September 2004
  • From: Dearborn Station
  • 24,281 posts
Posted by richhotrain on Saturday, January 8, 2011 10:55 AM

Hamltnblue

True, but when it does happen we somehow forget about these things and start troubleshooting it as a separate problem.  We recently ran across this at the club during an operating session.  A good bit of time troubleshooting just to find a lit passenger train crossed a Wye section that was a reversing loop.  The section was in place for over a year and we totally forgot about it.

Oh boy, that is both funny and duh.   I often wonder what a newbie thinks when he builds a layout with a reversing section or loop without realizing it because he has never heard of, or at least encountered, a reverse polarity situation.

Rich

Alton Junction

  • Member since
    May 2008
  • 4,612 posts
Posted by Hamltnblue on Saturday, January 8, 2011 10:12 AM

True, but when it does happen we somehow forget about these things and start troubleshooting it as a separate problem.  We recently ran across this at the club during an operating session.  A good bit of time troubleshooting just to find a lit passenger train crossed a Wye section that was a reversing loop.  The section was in place for over a year and we totally forgot about it.

Springfield PA

  • Member since
    September 2004
  • From: Dearborn Station
  • 24,281 posts
Posted by richhotrain on Saturday, January 8, 2011 9:35 AM

Hamltnblue

With no lighted passenger cars you're usually ok but it limits your future.   Also you always have the chance that rolling stock wheels can bridge the gap on the back end of the loop the same time the loco's cross the front part. 

HB,

What is life without risk?  LOL

Rich

Alton Junction

  • Member since
    May 2008
  • 4,612 posts
Posted by Hamltnblue on Saturday, January 8, 2011 9:07 AM

With no lighted passenger cars you're usually ok but it limits your future.   Also you always have the chance that rolling stock wheels can bridge the gap on the back end of the loop the same time the loco's cross the front part. 

Springfield PA

  • Member since
    September 2004
  • From: Dearborn Station
  • 24,281 posts
Posted by richhotrain on Saturday, January 8, 2011 8:09 AM

mactier_hogger

Quick question...is the red section longer than your passenger train?

Good question and the answer is No.  I violated my own maxim that the reversing section should be longer than the longest train.  However, it is long enough to accomodate a four engine consist (an F7 ABBA, in my case).  Since I don't have any lighted passenger cars or cabooses with power pickups, I didn't bother.  That reversing section shown in red is over 4 feet long, but it is shorter than some of my pasenger trains.

Depending upon the overall track configuration on your layout, you will need to decide how long the reversing section should be, and where the reversing section will be placed, so you can determine where to gap the rails.

Rich

Alton Junction

  • Member since
    December 2008
  • From: Bracebridge, ON
  • 235 posts
Posted by mactier_hogger on Saturday, January 8, 2011 7:56 AM

Quick question...is the red section longer than your passenger train?

Dean

30 years 1:1 Canadian Pacific.....now switching in HOSmile

  • Member since
    September 2004
  • From: Dearborn Station
  • 24,281 posts
Posted by richhotrain on Friday, January 7, 2011 9:02 PM

In a way, your diagram reminds me of a portion of my layout, as shown in the following diagram, where two tracks branch off of the mainline and feed into my passenger station on the right.  I colored that lower track red to represent my reversing section.  All of the track colored black is the non-reversing section of my layout. This diagram is greatly simplified just to give you an idea of how I dealt with the reversing section.

Alton Junction

  • Member since
    December 2008
  • From: Bracebridge, ON
  • 235 posts
Posted by mactier_hogger on Friday, January 7, 2011 7:47 PM

Thanks MisterBeasley. The square or oval is what I had under the Christmas tree this year. I'm going to expand it for next year to go around two walls of the room with another reverse loop at the other end. Thought I'd keep the original oval in order to let one train go around a few times while another  one worked it's way over to the passing track from the opposite end of the room!

Dean

30 years 1:1 Canadian Pacific.....now switching in HOSmile

  • Member since
    December 2004
  • From: Bedford, MA, USA
  • 21,483 posts
Posted by MisterBeasley on Friday, January 7, 2011 7:41 PM

I took the liberty of inserting IMG tags:

I had to think about it for a minute, but yes, it is a simple reverse loop.  The extra connecting track which turns the reverse loop itself into a continuous loop should have no effect on the required wiring.

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

  • Member since
    December 2008
  • From: Bracebridge, ON
  • 235 posts
Reverse loop
Posted by mactier_hogger on Friday, January 7, 2011 7:31 PM

http://i1228.photobucket.com/albums/ee447/Dean_Purcell/layout.jpg

Am I right in assuming that this is a simple reverse loop in regards to wiring?

Dean

30 years 1:1 Canadian Pacific.....now switching in HOSmile

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