Hi all,
since a few months, it has been fashionable on this forum to discuss here and there around the concept of Aircraft Stability.
So, in order to help the reader to understand what does this concept means and makes all understand it easily (as it does not look like that all of those arguing really understand the basis), here is an extract of an interesting video on the Su-27 design story that deals graphically with aircraft stability.
You will be delighted to watch it even more, if you pay attention to who explains it.
Scroll down video to point 29min26 secs for the quick lesson to start
~S!