Assertion: airfoil's lift | /r/CapableOf | increase the angle of attack
Facets:
value: beyond this critical angle of attack
type: OTHER
Source sentences:
text: 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.