Wing stalls due to an excessive angle of attack Laminar airflow Turbulence Phase 1 Whip Stall Phase 2 Phase 3 Phase 4 Wing comletely  stalled and very high pitch angle Pitch attitude for normal dive recovery Vertical dive N o s e r o t a t e s d o w n Nose is tucked under Tumble Figure 2-37. Whip stall to tumble phases and sequence. Figure 2-36. Stall progression for an airfoil chord as the angle of  attack is increased. Because the AOA of the WSC wing root chord/nose is so much  higher than the AOA of the tips, the nose stalls before the tips.  It is similar to stalling with the airplane canard in which the  nose stalls first, the main wing (or tips for the WSC aircraft)  continues to fly, and the nose drops due to lack of lift. In most normal situations, the root chord/nose stalls fi rst  because it is at a much higher AOA. The tips continue to fl y,  making the WSC wing resistant to a complete wing stall. A  pilot can even bring the aircraft into a high pitch angle stall  attitude and keep the nose high. The nose stalls and rotates  down because of the loss of lift, while the tips keep fl ying  and maintain control of the aircraft. If fl ying within the operating limitations of the aircraft and  the WSC reaches a high AOA, the nose stalls, but the tips  continue flying. However, it must be understood that there are  many wing designs with many types of stall characteristics  for each unique design. For example, high-performance  wings could have less twist to gain performance, which  could cause the wing to stall more abruptly than a training  wing with more twist. A WSC aircraft can get to a high pitch attitude by fl ying  outside the its limitations or flying in extreme/severe  turbulence. If the wing gets to such a high pitch attitude and  the AOA is high enough that the tips stall, a whip stall occurs.  [Figure 2-37]  In a WSC wing, most of the area of the wing is behind the CG  (about three-quarters). With the tips and aft part of the wing  having the greatest drag, and the weight being forward, an  immediate and strong nose-down moment is created and the  WSC nose starts to drop. Since both the relative wind and the   Whip Stall–Tuck–Tumble 2-19