Derivative of lift coefficient with respect to angle of atteck? - Answers

The derivative of the lift coefficient (Cl) with respect to the angle of attack (α) is known as the lift curve slope and is typically denoted as dCl/dα. This slope indicates how the lift coefficient changes as the angle of attack increases. For small angles of attack, this value is approximately constant and is often around 2π in radians for thin airfoils, indicating a strong linear relationship between Cl and α. However, as the angle of attack increases beyond a certain point, the lift coefficient may begin to stall, causing the relationship to become non-linear.