Early Aircraft Question

[KJ_Lesnick]

I remember on Secret Projects (I was banned there so I can't just go on) I remember something about a novel aircraft design that was designed in such a way as to use an unusual wing-structure to exploit aeroelasticity as to produce a self-stabilizing effect.  Early plane designers considered it a holy grail to have an airplane that like a stable boat would just right itself rather than require constant adjustment by the pilot.

Anybody heard of this??