Assertion: sail's shape | /r/HasProperty | dimensional
Facets:
Source sentences:
text: The flat panels are first cut or otherwise formed into the desired predetermined shape, and adjacent panels are joined together by sewing or broadseaming to provide a sail having a three dimensional or airfoil shape.
text: This invention relates to sails for sailing vessels or other pliant lifting structures in which the sail or structure is constructed from a plaint sheet material and has a three dimensional airfoil shape for reaction with the wind.