I Learned the reflection theory today and it came into my head.
Geometry.
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Jes
Webmaster, Jes's Roller Coasters
"Thank You Jeff Putz"
http://www.coastergallery.com/1999/GA22.html
You can see the train is exiting the loop, and that side of the element is lower, for the reason Zero-G said.
However, on shuttle coasters with cobra rolls/butterfly turns/boomerangs (the thing on Batman & Robin and all variations of Vekoma Boomerangs) they are identical on both sides. Look at http://www.coastergallery.com/2000/PGA12.html for an example.
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Hi! I'm Hungry, whats your name?
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Jes
Webmaster, Jes's Roller Coasters
"Thank You Jeff Putz"
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