Assertion: windmill's sail | /r/HasProperty | mounted at angle
Facets:
value: to the wind
type: TRANSITIVE-OBJECT
value: rigidly
type: MANNER
Source sentences:
text: The sails are mounted at an angle or are given a slight twist so that the force of wind against them is divided into two components, one of which, in the plane of the sails, imparts rotation.
text: Multiple curved sails are rigidly mounted at an angle to the wind.