Assertion: yacht's sail | /r/CapableOf | act in two basic modes
Facets:
Source sentences:
text: Sails act in two basic modes; under the lift-predominant mode, the sail behaves in a manner analogous to a wing with airflow attached to both surfaces; under the drag-predominant mode, the sail acts in a manner analogous to a parachute with airflow in detached flow, eddying around the sail.