I am wondering which conditions are possible and what they mean:
- Aircraft is statically stable in pitch and there is a trim point (for a specific surface deflection)
--> So in this situation my aircraft will always return (in case of a disturbance) to the trimmed condition in "free flight mode" , right? d_cm/d_alpha < 0 --> stability criteria
- Aircraft is unstable
If I have an unstable aircraft, d_cm/d_alpha > 0 . But to my understanding, there should be still one point (one angle of attack) where it is stable , so a trimmed condition should be still possible. Because I should always be able to make something (like an aircraft) stable by using/moving the right control surfaces to a certain level so that there is no moment acting on the aircraft. This should be the concept of how combat fighters fly? Unstable in the whole but really agile with a fast control algorithm?
Can you confirm me this?
Thank you Lucas