Photo Loop Schematic e.jpg uploaded #photo-notice


w4dccqa@groups.io Notification <noreply@...>
 

The following photos have been uploaded to the Blair's files album of the w4dccqa@groups.io group.

By: Blair <smithbr@...>


Jim Betz
 

Blair,
  Your track plan is very "complex" and your "reversing sections" are (if I understand
how you intend them to work) -very- short (as in just the cross-over area?).  That 
seems, to me, to be a design for "impossible".  You -may- be able to redefine how
you wire it in order to avoid the reversing section nemesis ... a reversing section
that is shorter than the longest train going thru it.  If the train is too long sooner or
later (and usually sooner) the wheels will be crossing the gaps on both ends of
the reversing section.  
  You also added in a statement about "up to 4 trains all moving at once" - which 
further increases the probability (inevitability) that you will have the gaps at both
ends of the reversing section closed (gapped by the wheels).

  I'm afraid the above is the best I can do on this one.  I.e. Warnings, warnings,
warnings.  Running one train at a time it probably works but this seems like a
"double reversing section that is also overlapping another reversing section".

  Here is what I recommend - do what you think works then TEST.  Test first
with only one train, then add additional trains until you "max out".  If you
don't have problems then great.

  One last thing to consider ... are you creating something that "only works if
the operator(s) do all the right stuff at just the right times"?  If you track plan
-and- wiring depends upon humans never making a mistake - you will have
problems.  Not only with boomers - but even with your regular crew and/or
family and/or just you.
                                                                                          - Jim 


Blair
 

Nope, you've completely missed it, Jim.  I want to reverse the entire staging area and it's approach tracks, including the passing sidings.  All as a unit.  Based on the position of one set of switches, which the operators set as a single action.

But, given it's size, I want CB protection of the yard to be separate from the approach and siding trackage. 

I'm not sure what I can say to 'turn your head upside down', as this is what I've been saying all along.

Respectfully,

Blair

On 2021-08-18 20:49, Jim Betz wrote:
Blair,
  Your track plan is very "complex" and your "reversing sections" are (if I understand
how you intend them to work) -very- short (as in just the cross-over area?).  That 
seems, to me, to be a design for "impossible".  You -may- be able to redefine how
you wire it in order to avoid the reversing section nemesis ... a reversing section
that is shorter than the longest train going thru it.  If the train is too long sooner or
later (and usually sooner) the wheels will be crossing the gaps on both ends of
the reversing section.  
  You also added in a statement about "up to 4 trains all moving at once" - which 
further increases the probability (inevitability) that you will have the gaps at both
ends of the reversing section closed (gapped by the wheels).

  I'm afraid the above is the best I can do on this one.  I.e. Warnings, warnings,
warnings.  Running one train at a time it probably works but this seems like a
"double reversing section that is also overlapping another reversing section".

  Here is what I recommend - do what you think works then TEST.  Test first
with only one train, then add additional trains until you "max out".  If you
don't have problems then great.

  One last thing to consider ... are you creating something that "only works if
the operator(s) do all the right stuff at just the right times"?  If you track plan
-and- wiring depends upon humans never making a mistake - you will have
problems.  Not only with boomers - but even with your regular crew and/or
family and/or just you.
                                                                                          - Jim