Assertion: airfoil | /r/HasAspect | sharp leading edge
Facets:
value: usually
type: TEMPORAL
Source sentences:
text: Airfoils optimised for supersonic flight have a sharp leading edge to minimise drag.
text: Moreover, the airfoil must have a sharp trailing edge.
text: The Kutta condition gives some insight into why airfoils usually have sharp trailing edges, even though this is undesirable from structural and manufacturing viewpoints.