What is the degree limit for the elevator tab trailing edge down?

The degree limit for the elevator tab trailing edge down is established based on design specifications and safety considerations that govern aircraft control surfaces. In this context, the specification dictates that the trailing edge of the elevator tab should not exceed 22 degrees downward to maintain effective control and prevent any adverse aerodynamic effects that could result from excessive deflection. This limit ensures that pilots have sufficient control authority while also contributing to overall aircraft stability and safety during various flight conditions. The choice of 22 degrees is a critical parameter that reflects careful engineering to balance control effectiveness and aerodynamic performance.