Assertion: hang glider's wing | /r/HasAspect | naca 4 or 6 series
Facets:
value: for high lift
type: PURPOSE
Source sentences:
text: Improvement in performance is possible through modelling three-dimensional fuselages which encourage laminar flow, and in internally braced wings which can then have high-lift aerofoil profiles, such as the Clark Y or NACA 4 or 6 series, for high lift.