DEEP STALLS CAN DEVELOP FROM RELATIVELY SHALLOW ANGLES OF ATTACK

摘要

When flying at a near the airplane's minimum drag speed (V_(MD)), an increase in angle of attack causes drag to increase faster than lift. The airplane begins to sink. In turn and when maintaining a constant pitch attitude, this tendency results in a rapid increase in angle of attack as the flightpath trends more downward and less forward.rnOnce the stall has developed and a large amount of lift has been lost, the airplane will begin to sink rapidly, accompanied by a corresponding rapid increase in angle of attack. This is the beginning of what is termed a deep stall.