Assertion: flight feather | /r/HasProperty | asymmetrical
Facets:
value: with being narrower
type: OTHER
Source sentences:
text: Flight feathers are asymmetrical, which affects airflow over them and provides some of the lifting and thrusting force required for flight.
text: To achieve this, flight feathers are asymmetric, with the smaller vane on the leading edge in direct contact with the air during flight.
text: Flight feathers are asymmetrical, with the leading edge vane being narrower, thicker and less flexible than the trailing edge.
text: As in the wings of modern birds, the flight feathers of Archaeopteryx were somewhat asymmetrical and the tail feathers were rather broad.