After finishing the CG calculations for my plane at 'AIRCRAFT PROVING GROUNDS', I've got some questions that are puzzling me.

1. After moving my CG, does the Np move as well, or is it governed by the crafts measurements/physical attributes?

2. My aircraft has a flat plate style of horizontal stab, would having an airfoil section as a stab put the Np in a different position?

3. When deciding on a CG, am I safe as long as I stay forward of the Np, or, do bad thing start to manifest themselves at a point before the Np, ie, Does the Np signify a point where bad things 'start to happen' or do they start before that point?

4. If I wanted a plane that was totally neutral, inverted as well as right side up ( needing no elevator corrections whilst inverted), would the Np be the place to put the CG?


I know that it's a lot of questions for one post, but I suppose they are all inter-connected