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Author Topic: Tunnel size  (Read 1953 times)
lrparks

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« on: June 28, 2007, 12:40:57 PM »

I'm planning a tunnel for my railway. I want to make the tunnel big enough for any trains I may buy in the future. What should the inside dimensions of my tunnel be?

I plan on building a box form out of 2"x12" lumber and placing styrofoam in the box to serve as the tunnel. I also plan on cutting out a brick pattern out of some 1/16" thick acrylic sheet using a laser cutter to create a brick pattern on the outside of both ends. I may use chicken wire to add strength to the concrete.
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japasha

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« Reply #1 on: June 28, 2007, 01:34:24 PM »

LGB offered a templarte in one of their publications. It has all of the info you need as it was oversize.
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Kevin Strong


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« Reply #2 on: June 28, 2007, 01:56:31 PM »

Build the interior of the tunnel as large as possible, and let the portal itself fool the eye into thinking it's smaller. This way, if you should acquire a piece of equipment that stretches the capacity of the tunnel, you need only replace the portal, not the entire structure.

Having said that, I'd plan on a portal with a vertical clearance of no lower than 10", and a side-to-side clearance of no narrower than 7". That should accommodate almost everything that's on the market right now.

Later,

K
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CCSII

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« Reply #3 on: June 28, 2007, 05:19:50 PM »

Unless it is a curved tunnel.
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Charlie Mutschler

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« Reply #4 on: June 28, 2007, 08:52:44 PM »

Good one Kevin - that 10" portal should even accommodate the anticipated motive power.  Who knows - that might even allow passage of an EBT 16?  Smiley

Charlie
-30-
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