Assertion: glider's feature | /r/HasProperty | efficient wings
Facets:
value: highly
type: DEGREE
Source sentences:
text: Other features that made the Flyer a success were highly efficient wings and propellers, which resulted from the Wrights' exacting wind tunnel tests and made the most of the marginal power delivered by their early "homebuilt" engines; slow flying speeds (and hence survivable accidents); and an incremental test/development approach.