Assertion: airfoil's surface | /r/HasProperty | symmetrical upper and lower
Facets:
Source sentences:
text: Highly cambered airfoils produce more lift than lesser cambered airfoils, and an airfoil that has no camber is symmetrical upper and lower surface.
text: Flat surfaces (which are symmetrical sections) work well for tail surfaces to a point but aren't as good as a true airfoiled section.
text: Highly cambered airfoils produce more lift than lesser cambered airfoils, and an airfoil that has no camber is symmetrical upper and lower surface.