[bongodriver]

Most aircraft are not positive statically stable

Really?.....are you sure?

Positive Static Stability—The initial tendency of the airplane to return to the original state of equilibrium after being disturbed.

Static Stability is measured by Short period oscilations.

This sounds like 'most' aircraft to me and is certainly what I have experienced, the Spitfire was neutraly staticaly stable which is what gave it the light controls.

Dynamic stability is shown by measuring the long period oscilation, in the Spitfires case it was 'slightly' longitudinaly unstable and this is is what contributed to the maneuverability of the spitfire.