Re: Gravity Cavity
I'm not sure what your question is, exactly, but....
The "Gravity Cavity" was a feature of the old track layout. It was a big valley at the end of the back straight. You'd be flying down the long back straight, and then the track would just sort of fall away from you, not enought to catch air or anything, but giving just a bit fo that floating feeling. Just about the time you'd mentally recovered from that, you were pressed down hard against the bike as it climbed back up the other side. The Gravity Cavity.
It was great fun at my lowly speeds, but apparently it was pretty dangerous at race pace, so they completely rearranged the track a few years ago.
Here is a link to some on-bike footage from CLASS. The link labeled "Vintage Road Atlanta" shows "1997 footage of Jason on a VFR750 - 140 through the Gravity Cavity." I could only get my VFR750 to about 125-130 before I chickened out and started braking to enter the gravity cavity.
The following description of the track changes comes from
http://www.amasuperbike.com/atlanta98.htm
"The Road Atlanta racetrack has changed in many ways since the series last visited there. The frighten-you-to-your-bones Gravity Cavity is gone, replaced now with a chicane. In addition, the track itself has been widened and re-paved. Most found the changes favorable and as to whether it improved the racing or not--in a word, yes. The racetrack rewards precision and bravery, less so now than before the Cavity was removed. There are two decent straights at Road Atlanta so those with power will be rewarded, plus the track has just one racing line in places so getting a good start is very important. "