Assertion: helicopter's rotor | /r/HasProperty | tilted
Facets:
value: forward
type: MANNER
value: with becoming vertical
type: OTHER
value: progressively
type: MANNER
value: backward
type: MANNER
Source sentences:
text: The rotor is tilted backward.
text: As the aircraft gains speed, the rotors are progressively tilted forward, with the plane of rotation eventually becoming vertical.
text: Osprey has huge rotors at the front that can be tilted to point upward (like a helicopter) or forward (like a plane), combining the advantages of both in a single aircraft.