I know that this is better suited for the X-foil discussion board, but I am waiting for approval to join for a few days now.
I need to run some negative load factor run cases, inverted looping flight, negative Cl. AVL does not allow me to input the values into the looping flight condition. I thought I would try getting around this by building an inverted aero model, using inverted airfoils, and an inverted tail. It is not running properly. I will try to rebuild the model, and try again. Is there an easier way to run negative lift load cases? Thanks, David -- David Klein Graduate Research Student Department of Structural Engineering Jacobs School of Engineering University of California San Diego

