Assertion: sail's edge | /r/HasProperty | curved
Facets:
value: in order to get shape
type: PURPOSE
Source sentences:
text: The edges may be curved, either to extend the sail's shape as an airfoil or to define its shape in use.
text: The edges may be curved, either to extend the sail's shape as an airfoil or to define its shape in use.
text: The edges of shade sails are curved, which has the effect of reducing the shaded area but is essential to achieving correct structural tension.
text: But any edge attached to a spar needs to be curved in order to get shape into the sail.