just outta curiousity.......that wing folded inward...or towards the botton of his plane. had he been doing an outside loop, wouldn't the wing have folded to the outside of the loop....or the top of the plane?
The force on a wing is to the inside of a loop. More generically, the force on the wing is in the direction of the lift created by the pressure differential caused by the wing's angle of attack. For a loop, those forces are to the inside of the loop.
The only way the wing would have gone in the other direction is if the wing had failed in stages... Not only do wings create lift, but they also create a nose-down pitching moment which is counteracted by the tail (or canard for canard configured aircraft). Therefore it is conceivable that for an aircraft with a wing spar that is a simple tube, if the rear spar attachment point failed and the main spar lasted long enough for the wing to rotate forward around the main spar tube, then the wing might theoretically be able to rotate forward enough to decrease the angle of attack to the point where the wing departs the plane "down" instead of "up" (relative to the original angle of attack that caused the failure). In practice however, I have seen this sort of failure only in small model aircraft that were in level flight, and even then it happens so quickly it is hard to tell whether the wing went up or down as it failed.
