A nose-down pitching tendency caused by aft movement of the center of pressure and change in downwash at the tail. At high Mach, the center of pressure moves aft and shock-induced changes in downwash reduce tail effectiveness, causing nose-down pitch (tuck).

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Mach tuck is:

A nose-up pitching tendency at high Mach

Yawing at high Mach

A nose-down pitching tendency caused by aft movement of the center of pressure and change in downwash at the tail

Roll instability at high Mach

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