I recently decided to create a Schwarzkopf Looping Racer, a ride styled after the Revolution/SooperDooperLooper design. This ride interacts well the terrain, features one loop, and has what I hope is somewhat correct shaping.
I tried to design with ride to be rather family oriented aside from the loop like SooperDooperLooper was. SooperDoopLooper felt exactly like the Whizzer, but with a loop randomly inserted into the ride layout, so I tried to model that with light floater air, and no crazy forces. Minus the G's in the loop (around 4.5 max). This baby runs 4 trains with minimal stacking at the end (under 10 seconds. Since practically all real life rides stack like crazy, if you have a problem with around 5 seconds of it, you can go do something you don't like that involves profanity. Working on the supports now.
http://www.nolimitsdevcenter.net/p3849