id go with Yay. Do remember that the way the plane flies on the game is more like a estimate. Since the plane isnt real, they didnt have a way to know how it really flew.

BMatthews
If memory serves me right, i do believe taht the top wing had some anhedral (or however its spelt) to it. Might want to try to screen capture the plane from a front angle if you havent allready.