Assertion: yacht's sail | /r/CapableOf | act as lift
Facets:
value: for apparent wind angles
type: PURPOSE
Source sentences:
text: Because wind-powered vehicles typically sail at apparent wind angles aligned with the leading edge of the sail, the sail acts as an airfoil and lift is the predominant component of propulsion.
text: For apparent wind angles aligned with the entry point of the sail, the sail acts as an airfoil and lift is the predominant component of propulsion.