whether naturally or artificially obtained, FAR 25 requires a positive stick force gradient up to MD [demonstrated dive speed] which must be at least 0.07MN above MMO.
if not then MMO must be reduced in order to obtain that result, however stick force gradient may fall to zero at MD. only during training for upset recovery will such a condition be encountered as 411A graphically illustrates in his post, regarding the 707.
so if you remain at or below MMO then you shouldn't encounter any problems provided that the stability augmentation is operative
PA
Last edited by Pugilistic Animus; 9th Sep 2009 at 17:01.