Assertion: stable fixed wing aeroplane | /r/HasProperty | a model monoplane
Facets:
Source sentences:
text: In 1871, he flew the first aerodynamically stable fixed-wing aeroplane, a model monoplane he called the "Planophore", a distance of 40 metres (130 ft).
text: In 1871 he flew the first aerodynamically stable fixed-wing aeroplane, a model monoplane he called the "Planophore", a distance of 40 m (130 ft).