Assertion: airfoil's edge | /r/HasProperty | sharp
Facets:
value: fairly
type: DEGREE
value: as for a flat plate
type: OTHER
Source sentences:
text: The trailing edge is sharp and cut away at the bottom of the airfoil until it meets the lower surface at a tangent.
text: If, as for a flat plate, the leading edge is also sharp, then vortices also shed at the leading edge and the role of leading edge vortices is two-fold：(1)
text: To produce flow-deflection as well as the "circulation" required for lift, the trailing edge of an airfoil must be fairly sharp.