# Can 'neutral static stability' only be achieved by constantly augmenting the control surfaces?

I watched a flight mechanics lecture that mentioned that some combat aircraft like the Hornet has a 'mode' where the on-board computer simultaneously and automatically adjusts all the control surfaces to make the plane fly with Statically neutral stability which to my understanding means that the lift moment is constantly aligned with the plane's center of gravity.

The result is that the pilot is able to pull back on the controls and pitch up and release the input and have the plane continue to fly in a new direction without any tendency to diverge or return to equilibrium (the trim position).

Is this true and is this stability only possible with a constant re-balance of the control surfaces of the plane?

• – mins Nov 1 '15 at 11:04

An aircraft which is (statically) neutrally stable tends to stay in its new attitude when it's disturbed. For example, if you pitch the nose up by, say $2^{\circ}$, and then immediately after that it stays at $2^{\circ}$ nose up.