From: Bill Lohman <844bill@gmail.com>
To: ttat-members@aoot.com
Sent: Sat, May 8, 2010 4:35:47 PM
Subject: Atlas O Track Geometry and Interference Problems
FYI to help any of you planning to use Atlas O track. The same would extend to Ross with variations.
I use Atlas O track on my layout. Their system and all track products and bridges are all based on 4.5 inch track centers.
In my case I was making two concentric 90 degree turns in Cornfield Meet Corner where it crosses Headache High Bridge with 099 curves on the outside and 090 curves on the inside on 4.5 inch centers.
Big surprise. I thought Atlas O had it all figured out. My Big Boy and 21 inch passenger cars totally interfer with each other( as was the case with some of the club corners on 4 inch centers). I had to widen the track centers to 5 inches.
The same situation will bite those of you who plan to use Ross track which has 5 1/4 inch centers. Even tighter.
Bill