Assertion: airfoil's angle | /r/HasProperty | negative
Facets:
Source sentences:
text: The angle of incidence is negative when the leading edge is lower than the trailing edge of the wing.
text: When the leading edge of the wing is higher than the trailing edge, the angle of incidence is said to be positive.
text: One could argue that a "nozzle" occurs when the angle of the flat plate is negative.