Ken, Your description follows the maneuver most of us are familiar with, which has an entry at the bottom. The subject of the debate is FAI's description in F-17 that adds a 45 degree entry and exit and appears to enter the actual rolling part from the side. Typically garbled FAI maneuver description that will take two years to determine what they want in Europe. Reviewing shannah's original post, this sounds like a knife-edge barrel roll and not a positive G maneuver at all.