For those of you who like military aviation, you should know the "knife pass" displayed on every air shows.
During that display the plane isn't either on the normal position or the upside down position. It's in a middle position and I wonder how can the plane fly without the wings surface.
I think lift here doesn't work because the wings axis is not parallel with the ground, it's perpendicular.
I know for example in a dog fight, the plane can do any thing the pilot wants, as long as the structural limits are not pushed too much, but in this case the G forces do the work. In the knife pass the pilot is under 1G, flying in a straight line, so, how can the plane be sustained.
Imagine this F-16 flying staight ahead for 2Km. What surface keeps it sustained?
Mirage, Faro, Portugal