Dynamic characteristics of a sailplane with all-moving tail

Abstract

All-moving tails, often applied to saiplanes and aeroplanes before WW II, were neglected by the designers of light aircraft in the 40's and 50's though they were used on subsonic and supersonic aircraft....   The most important influence on the short-period oscillation modes of a sailplane with stick free is exerted by the position of the tail hinge line, the limiting position of this line for oscillatory instability being in front of the limit at which the all-moving tail itself becomes statically unstable....