A stall occurs when the smooth airflow over the unmanned airplane's wing is disrupted and lift decreases. This is caused by
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A stall is an aerodynamic event that occurs when the wing's angle of attack exceeds the critical angle (approximately 15-18° for most airfoils). At the critical AOA, airflow separates from the upper wing surface, destroying lift. Stall can occur at any airspeed, even at high speed in an aggressive pullout.The trap →
Stall is NOT caused by low airspeed directly. It's caused by exceeding critical angle of attack. High airspeed can create a stall if aggressive maneuvering causes high AOA. Propeller RPM is irrelevant to wing stall.SOURCE → PHAK Chapter 5, FAA UAG Sample Question 23CHECKED APR 21ACS IV.A.K1MED