What is "aircraft stability" - IN VIDEO

[JtD]

OK and thanks for the information as such.

It changes nothing about what I wrote, though, if you meant to refer to that.

[TomcatViP]

Another short video explaining the main diff. btw relaxed stability aircraft and stable aircraft:

http://www.youtube.com/watch?v=VImEvFg3smQ

I think it complete well the first one and was needed here.

[JG14_Josf]

Hi,

From the first video it seems clear enough that an unstable airplane (center of lift in front of the center of gravity) is like pushing a shopping cart and trying to keep the castor wheels facing the wrong way - impossible.

Castor wheels have center of axis ahead of the contact patch where the wheel meets the road.