Expensive, too!
And as soon as the O96 curve is available, we can do another go-around on each side.
--Joe
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What are the overall dimensions?
Only one problem, you can still only drive short trains on it otherwise it'll hit itself on the inside turn. But still fun to watch.
Joe,
That looks like it will make you dizzy watching a train go around that layout! I love the creativity of it. I could see the challenge of running three trains on it. All I can say is "Beep, Beep-Beep, Beep-Beep-Beep" 
For those of you who need the reference...
The only drawback I see would be the length of the train, which would be limited by the lengths of the inner most loops.
Originally Posted by Loyal2Lionel:
What are the overall dimensions?
The grid lines are 1 foot by 1 foot.
I been hyp-mo-tized!
That is just crazy!
Spiral the loops up as they go in, Trestle across the horizontal run.
Problem of longer train solved.
Won't work! My living room isn't that big!
It is a neat idea you had here however.
Lots of fun!
smallest circle prior to a cross over is on O36, Circumference (train length) = 2(pie)r => 36in(3.14) = 108in, but since it's only a 3/4 circle =>81, but there's the straight pieces looks like two 10's and two 5's => another 30in gets us a train of 111in. Assume standard rolling stock is 10in per car (freight) that's 8 cars plus a caboose. Decent for the kids.
Our christmas layout had the three car RTR PE set and three box cars, a hopper and caboose going around a O36 loop connected to a 45 crossover.
Real limiting factor is what minimum radius of engine/rolling stock.
Trestle going horizontally, but it may be kind of steep unless you give it more room to ascend and descend.
