Marc J. Zeitlin
Keith Spreuer wrote:
I don't even know what that means - roll stability... They're about on the CG, so even though they add area, they won't affect pitch or yaw (directional) stability much, if any.
But the spiral (roll stability) mode in these planes is generally negative and non-oscillatory, meaning that eventually, the plane will fall off to one side or the other and the roll angle will continue increasing if not corrected by the pilot. "Straightening the airflow" means nothing in this context.
So I'm with you - skeptical, at best.