When are spins most likely to occur?

Spins are most likely to occur when an aircraft exceeds the critical angle of attack. This is because a spin generally initiates after a stall, which happens when the aircraft's wings cannot generate enough lift due to an excessive angle of attack. The critical angle of attack is the maximum angle at which the wings can maintain smooth airflow without stalling.

When an aircraft exceeds this angle, the airflow over the wings disrupts, leading to a loss of lift, and if the aircraft is not properly managed (such as being in a yawed state), it can enter a spin from that stall condition. Understanding this concept is crucial for pilots, as preventing spins involves maintaining control of the aircraft and ensuring that the angle of attack remains within safe limits.