When does a dynamic stall typically occur?

A dynamic stall typically occurs at the end of a flare when the jumper begins to rock back under the canopy. This phenomenon happens just as the jumper transitions from the descent phase into the landing phase. During the flare, the pilot increases the angle of attack of the canopy to reduce descent rate and increase lift just before landing.

As the jumper starts to lean back to prepare for landing, the increased angle of attack may exceed the critical point, leading to a situation where the airflow over the wings can no longer maintain lift effectively. This stall can result in a sudden loss of lift and may cause the jumper to fall more abruptly than intended, accentuating the importance of proper flare timing and technique. Understanding dynamic stalls is crucial for maintaining control during landing and ensuring safety during skydiving maneuvers.