Originally Posted by
grotto2
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.
Correct. It's neither positive or negative really. The wing tip follows the "barrel" around, not the top or bottom of the plane as a normal barrel roll is performed.
If they used the description as per Michael Ramels clarification, there wouldn't be so much confusion.