Assertion: airfoil's lift | /r/CapableOf | reach maximum
Facets:
value: at some angle
type: MANNER
value: as the angle of attack increases
type: TEMPORAL
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.