An aircraft with critical Mach number of 0.72 is flying at a speed of 700 kph at analtitude of 30,000 feet. It gradually increases its speed. When the speed exceeded 780 kph the aircraft started to pitch down automatically. The pilot adjusted the elevators and brought the aircraft to a stable position. He then increased the speed even more but the aircraft again started to pitch down. Why did this happen? What technical changes can be made in the aircraft's design to reduce this effect.

anesh krishna , 10 Years ago

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