Thanks for your reply Mad (Flt) Scientist.
While accelerating or decelerating, the balance of the stick in the aircraft wasn't the problem. I thought another issue could be how the vertical accelerometer is referenced. These aircraft generally fly slightly nose-up with positive AOA particularly in the speed regime I mention previously.
If the accelerometer is referenced to the aircraft waterline/nose and not the velocity vector, then accelerating in level flight would cause the vertical accelerometer to sense a resultant <1g force.
However these devices are reference to the velocity vector so this isn't an issue.
Regarding case
3) I don't think the FCS needs to be predictive. If we consider unstable/RSS aircraft such as the F-117A, F-16 and Super Hornet, pilots talk about how smooth, responsive and easy the planes are to fly.
These aircraft I understand have a natural tendency to diverge from a current attitude when a small force is applied. So if the pilot entered a small pitch input, the aircraft will divert from its current attitude at an increasing rate without the aid of computers for stability.
Pilots flying these aircraft don't notice any divergence. A quick pitch up to ten degrees is performed accurately without the flightpath/nose overshooting or deviating. So the FCS and flight control surfaces are quick enough to stabilise any unwanted excurisons,
not before they happen but before they are noticable to the pilot. I guess its like using a calculator, the delay before you get an answer is so very brief, it appears as if the calculations were performed instantaneously.
This is very confusing
Obi