I think your probably wanting something like IMAC.
IMAC tends to center around scale aerobatic planes like the extra, edge, yak, etc.
They fly the same maneuvers that you would see at a "real" aerobatic competition with full size aircraft.
Its judged very similar to pattern competition.

Check out the following sites for more information


3D - http://www.blaineaustin.com/tech_tips.htm
Pattern - www.nsrca.org
IMAC - http://www.mini-iac.com/DesktopDefault.aspx