## Re: Bridge clearance

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• Depends on how many curves there are in your ton of curves. 2000/number of curves have a great weekend cheerz Garth
Message 1 of 9 , Dec 5, 2010
Depends on how many curves there are in your ton of curves.

2000/number of curves

have a great weekend

cheerz Garth

--- In z_scale@yahoogroups.com, "FT. Dewey" <kc5uci_2@...> wrote:
>
> "it has a TON of curves."
>
> Just out of curiosity, how much does each curve weigh? :-oÂ Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â  DEWEY
>
> Sometimes the light at the end of the tunnel is an oncoming train.
> o o o o o o o . . . ______________________________
> o _____ || |
> .][__n_n_|DD[ ====_____ | |
> >(________|__|_[_________]_|____________________________|
> _/oo OOOOO oo` ooo ooo 'o!o!o o!o!o`
> -+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
>
> --- On Sat, 12/4/10, Don Avila <zbarr474@...> wrote:
>
> From: Don Avila <zbarr474@...>
> Subject: Re: [Z_Scale] Bridge clearance
> To: z_scale@yahoogroups.com
> Date: Saturday, December 4, 2010, 4:05 PM
>
> *Michael:
>
> Don't forget you can have a dip or depression leading up to and under and
> layout is 2% and have no problem and it has a TON of curves.
>
> ...don
>
>
> *
> On Sat, Dec 4, 2010 at 4:40 PM, Michael Piersdorff <ironduke@...>wrote:
>
> >
> >
> > Thank you, Mark. I tried the 1 3/8 inch recommended in one of the other
> > replies, and the grade is a bit steep (bit under 2% in one direction, bit
> > over in the other). I am trying to lengthen the run-up to the bridge, but is
> > isn't easy on a 24 X 26 layout with a folded figure 8 (hello, Loren) layout.
> > I will plug in the 1.2" you have given me, and see what result I get. I am
> > using 3rdPlanIt software, so it isn't as if I have to rip out finished
> > trackwork to make the change.
> >
> > Michael
> >
> > __________________________________________________________
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>
> --
> *...don a*Â  *- Northern Ohio, USA*
>
>
> [Non-text portions of this message have been removed]
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>
> ------------------------------------
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> Z-scale:Â  minimum siZe, MAXIMUM enjoyment!
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• Michael, I think you re really giving yourself a challenge trying the do a bridge in 24 x 26. I did it a while back on a 36 square. Try thinking of the layout
Message 2 of 9 , Dec 5, 2010
Michael,
I think you're really giving yourself a challenge trying the do a bridge in 24 x 26. I did it a while back on a 36" square. Try thinking of the layout being two separate loops: the goes-under loop with a grade that runs from 0 to about 3/4" and a goes-over loop that runs from 1 3/8 down to about 3/4". Then run a transition track between the two loops around the 3/4" height points on the two loops. You can get away with a 2+ % grade on a short transition track easier than on the main.
BTW: I also use 3rdPlanIt and I like it, although like Loren I still feel the urge to get out the colored pencils and grid paper.

Mark

--- In z_scale@yahoogroups.com, Michael Piersdorff <ironduke@...> wrote:
>
> Thank you, Mark. I tried the 1 3/8 inch recommended in one of the other replies, and the grade is a bit steep (bit under 2% in one direction, bit over in the other). I am trying to lengthen the run-up to the bridge, but is isn't easy on a 24 X 26 layout with a folded figure 8 (hello, Loren) layout. I will plug in the 1.2" you have given me, and see what result I get. I am using 3rdPlanIt software, so it isn't as if I have to rip out finished trackwork to make the change.
>
> Michael
>
> ____________________________________________________________
> TRY FREE IM TOOLPACK at http://www.imtoolpack.com/default.aspx?rc=if5
> Capture screenshots, upload images, edit and send them to your friends
>
• Michael, Here is my 2¢. Were I can I will have 40 mm [1.575”] clearance from the top of the rails.  My minimum clearance is 35 mm [1.378”], which will be
Message 3 of 9 , Dec 5, 2010
Michael,
Here is my 2¢.
Were I can I will have 40 mm [1.575”] clearance from the top of the rails.  My minimum clearance is 35 mm [1.378”], which will be enough to include a catenary wire.  The absolute minimum (without catenary wire) is 30 mm [1.180”] and will give a 2 mm [0.078”] clearance on the highest car.
All the beZtzzz,
(Het aller beZte)
Ed

--- On Sun, 12/5/10, mark2playz <mark.markham@...> wrote:

From: mark2playz <mark.markham@...>
Subject: [Z_Scale] Re: Bridge clearance
To: z_scale@yahoogroups.com
Date: Sunday, December 5, 2010, 3:47 PM

Michael,
I think you're really giving yourself a challenge trying the do a bridge in 24 x 26. I did it a while back on a 36" square. Try thinking of the layout being two separate loops: the goes-under loop with a grade that runs from 0 to about 3/4" and a goes-over loop that runs from 1 3/8 down to about 3/4". Then run a transition track between the two loops around the 3/4" height points on the two loops. You can get away with a 2+ % grade on a short transition track easier than on the main.
BTW: I also use 3rdPlanIt and I like it, although like Loren I still feel the urge to get out the colored pencils and grid paper.

Mark

--- In z_scale@yahoogroups.com, Michael Piersdorff <ironduke@...> wrote:
>
> Thank you, Mark. I tried the 1 3/8 inch recommended in one of the other replies, and the grade is a bit steep (bit under 2% in one direction, bit over in the other). I am trying to lengthen the run-up to the bridge, but is isn't easy on a 24 X 26 layout with a folded figure 8 (hello, Loren) layout. I will plug in the 1.2" you have given me, and see what result I get. I am using 3rdPlanIt software, so it isn't as if I have to rip out finished trackwork to make the change.
>
> Michael
>
> __________________________________________________________
> TRY FREE IM TOOLPACK at http://www.imtoolpack.com/default.aspx?rc=if5
> Capture screenshots, upload images, edit and send them to your friends
>

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