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Reverse Loop

Started by owl90, January 28, 2020, 11:56:01 pm

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owl90

I am trying to make a Reverse Loop, But when I save it and then open the track plan up again it has change the reverse Loop

Could use some Help

Tom Springer

Please post the .ANY file so we can see what is happening.
Tom Springer

(Unintentional Pyromaniac)

owl90

Tom Not sure hw to post the file

Tom Springer

Use the REPLY button, then click the "Attachments and other options", then under "Drag and drop your files here" click "add files" and then select your .ANY file.  Then click "upload" and then "Post".
Tom Springer

(Unintentional Pyromaniac)

owl90

Hope this works I have marked the area I am trying to add the reverse loop with a red outline

Tom Springer

By "change" you presumably meant AR shows a 'different' reverse loop each time.

Yes, it does.  Because there are multiple reverse loops superimposed on (overlaying) each other.  And AR can only show one at a time.

The attached plan has my added arrow showing the double-turnout that is the cause of the multiple reverse loops.  As AR has marked the reverse loop in my attached file, this is the 'smallest' reverse loop. Or maybe call this the 'initial' reverse loop.

The track coming out of the right-side turnout (where the arrow is) generates the additional reverse loops, all of which incorporate the 'smallest/initial' reverse loop within them.

If you disconnect the double turnouts for a moment, you'd see the multiple reverse loops eliminated.

The 'multiple' superimposed reverse loop situation is probably something AR will have to address.  We had discussed this situation in another thread a while back, so I'm sure it's on David's list of improvements.
Tom Springer

(Unintentional Pyromaniac)

owl90

Thanks Tom that's I Thought the problem was, it looks like I will have to deal with 2 Reverse loops then.
I do need to run for now it time for dinner here in Ohio

Don
 

Tom Springer

If you could properly wire (handle) that actual loop that AR highlights as the 'smaller'/'initial' reverse loop, you might be able to make this work ... and call it as being 'just' 1 reverse loop'.  But that "probably" would need a small section of straight track at the arrow where the 2 turnouts connect.  Don't know if that can be done, physically.  Or even if it would work.

The blue right-handed turnout at the bottom on the right (green arrow) also seeds special consideration when the current reverses in the loop.  (Or the DCC switching unit does the reversing.)  An electrical isolator may not be enough; a straight track segment might be needed.

Same for the yellow turnout connected to the blue turnout at the lower left of the layout (blue arrow).

Wish you luck with this.  These things can drive one to hair loss.
Tom Springer

(Unintentional Pyromaniac)

Tom Springer

Don, btw it's not 2 "reverse loops"; it's "many".  A 'reverse loop condition' occurs in places on your layout where you might not think they do; it doesn't have to be a 'loop', just anywhere current flow 'collides'.  Example: you travel 'south' (clockwise) down the yellow track on the right side of your layout, reaching the curved turnout marked A.  Now take the right curved leg so you proceed towards point B.  This goes through the Wye turnout to the right of my red arrow; this Wye needs to be isolated and is the base for a reversed loop (that you just traveled).  Ok, the current is reversed. Now proceed through the left Wye turnout towards B.  The current is flowing to the 'left'; as you travel around the loop, and when you reach point C, the current flow flows to the 'right'.  The current flowing from A towards C is flowing 'left' (clockwise), but now the current from C to A is flowing 'right' (counterclockwise). Hence at C, there is a 'reverse loop condition' that is solved outside of the solutions involving the 2 Wyes at the red arrow.  And there are a few more of these situations to be found.  "Few" might be a very generous word.  Think about the blue track connections in that area in all of this.
Tom Springer

(Unintentional Pyromaniac)

owl90

Tom I guess I need to take a hard look at this, and maybe rethink the the track I have in the red BOX ???

Don

Tom Springer

Don,

Is this your first layout?  Are you experienced in complicated wiring for these types of layouts?  And, DC or DCC?  DCC can make this somewhat easier to potentially handle, once you get things more 'isolated' and less complex.

How important is that loop (the reverse loop AR highlights)?  Is there an alternative with fewer connections nearby?  What if that reversing loop was replaced by a simple "Wye loop" in the area marked with the X?
Tom Springer

(Unintentional Pyromaniac)

owl90

Tom
I have been working on the layout since 2014 when I got back into the hobby and I Had A DC layout 6x10'back in the Late 50's

I am DC Now but I plan to Add DCC soon

My layout now is closer to everything you see in the plan, except The layout now does not have what I Have put into the red area. It is only 2 main line in that are with turnouts from track 1 (Blue) to Track 2 (Yellow) so I can leave Track 1 to get to the dogbone off of Track 2 (yellow)

The area marked with X is the area that my wife has a farm in so that will not be a good area

I have all my buss wireing ready for DCC

As for the AR I would like t have it so we can change directions

I don,t need to put in the AR NOW, but would like to add it down the road, I have tried other place for the AR
without any room to put one in.

Don


Tom Springer

The wife always wins.

The bottom green track, at the top of the layout, is for what?  You could make it a reversing track.
Tom Springer

(Unintentional Pyromaniac)

owl90

Win is correct

It is a Main Line/Yard

I wiil try making it a reverse Track

Tom Springer

Seeing that your min radius is 18in, this won't work.  Back to the drawing aboard.
Tom Springer

(Unintentional Pyromaniac)