A bank angle above what degree introduces a risk of skidding due to excess load?

A bank angle of 30 degrees introduces a risk of skidding due to excess load because, at this angle, the aircraft's load factor increases significantly. When an aircraft is banked, the load factor – the amount of lift required to maintain level flight – increases in relation to the bank angle. Specifically, at 30 degrees of bank, the load factor increases to approximately 1.15, meaning the wings must generate 15% more lift to maintain level flight.

As the bank angle and corresponding load factor increase, so does the risk of skidding when the aircraft enters a turn. This occurs because the centrifugal force exerted on the aircraft increases, resulting in a greater banking effect that can push the aircraft beyond its limits of control if not properly managed. Additionally, banking at this angle can lead to lower airspeed, further complicating the pilot’s ability to maintain control, especially if the aircraft encounters a gust or turbulence.

Understanding this relationship between bank angle and load factor is essential for pilots in ensuring they remain within safe operational limits and can adequately manage their aircraft during turns.