A true pretzel loop? Simple... some people or rollercoaster companies define it as a Boomerang element. I say a boomerang element is a half-loop, two half-corkscrews, and a half-loop again reversing your direction 180 degrees (as opposed to the heart loop, found on all cloned Vekoma SLC's which keep you going in the same direction). The pretzal element is a half-corkscrew, 2 half-loops, and a half-corkscrew again turning you back in the direction you came!
There is one located at Six Flags Darien Lake pictured here:
http://www.rcdb.com/installationgallery224.htm?Picture=2 Companies can call them what they want to... but I wish there was an industry standard what a specific element is...
ie: Corkscrew, Boomerang, Cobra Roll, Zero-G Roll, Heartline Roll, Pretzal...etc. Some of those are the same thing! Kind of confuses the average person.
-------------
The Great Escape... Soon to become Six Flags Adirondack Escape!!!
*** This post was edited by Dawg Byte on 7/4/2001. ***