Angle of attack

https://gyazo.com/fe705aca887ab853d9762826d95aa197

AoAを大きくしすぎると失速する

As the angle of attack increases, the lift reaches a maximum at some angle;

increasing the angle of attack beyond this critical angle of attack causes the upper-surface flow to separate from the wing; there is less deflection downward so the airfoil generates less lift. The airfoil is said to be stalled.

https://gyazo.com/0b4e61a7ef842cd44fb7eea57f141609

https://gyazo.com/6f82d15ad0b4162c5f913e9542c691da