The way I look at it, the most important requirement is controlability (pilot capability to control)
If the airplane was unstable it would not have controlability. If it was too stablebit would neither have controlability because of lack of manoeuvrability.
But if the airplane had a FBW flight control system such that it can always meet pilot demand no matter how unstable the basic airplane might be, what sets the lower limit of stability?
Wait, Now thinking I guess that certification requirements must account for failure of the FCS. Is that so? The aft CG limit of an A320 or a B777 is determined because of the direct law possibility?
Last edited by Microburst2002; 20th May 2012 at 09:20.