RVR, thats an interesting website (if a little americanised). From what I just glanced at it has some good stuff in there if you look hard enough. I didn't find much that helps with flying inverted though.
MR, aerodynamic rules do still apply, but rest easy, our inverted aerofoil can produce lift away from the ground if the angle of attack is good and positive. An assymetrical aerofoil will be less efficient inverted, but can be made to produce lift. Equally, if the aircraft is th right way up it can still produce "negative lift" which would accelerate the aircraft towards the ground (producing negative "g").