Intuitively I guess when the elevator is deflected to the maximum and the AoA is just before stall, we will get the most afterwards pressure center position of H.T.. I have NACA0009 as H.T. airfoil and elevator chord length is 33% of the H.T.. They are all very typical values. I’m wondering what would be the most afterwards c.p. position of the H.T. for different elevator deflection angle and AoA? Any knowledge or reference on this?