What is a primary consequence of Mach tuck?

Mach tuck is a phenomenon that occurs in an aircraft when it approaches transonic speeds, typically around Mach 0.75 to Mach 1. As the aircraft accelerates towards these higher speeds, the center of pressure—the point at which lift is effectively concentrated—moves aft, leading to a reduction in the effectiveness of the tailplane and the elevator. This shift can endanger the stability and controllability of the aircraft, as the tail becomes less effective at providing the necessary pitch control.

In practical terms, as the center of pressure shifts, the pilot may find it increasingly challenging to maintain level flight or to control the aircraft's nose position, which could result in a dangerous increase in pitch attitude if not managed correctly. This effect is particularly pronounced in swept-wing aircraft, which are more susceptible to changes in airflow characteristics at high speeds.