What is Mach tuck?

Mach tuck is a phenomenon that occurs when an aircraft travels at transonic speeds, approaching the speed of sound. The correct answer refers to a dive caused by shockwaves over the wing. As an aircraft accelerates towards the speed of sound, shockwaves can begin to form around the wings, particularly at the leading edges. This can lead to a change in the aircraft's aerodynamic characteristics, resulting in a nose-down pitch or dive as the control surfaces become less effective.

Understanding this phenomenon is essential as it highlights the challenges pilots face when transitioning through transonic speeds. The aerodynamic forces at play can cause a rapid loss of lift and changes in stability, which pilots must manage carefully to maintain control. The other choices do not accurately describe Mach tuck; for instance, while a sudden loss of lift or a stall can occur during high-speed flight, they do not specifically characterize the dive associated with shockwaves.