Assertion: helicopter's speed | /r/HasProperty | over 300 knots
Facets:
Source sentences:
text: However, with the tiltrotor this problem is avoided, because the proprotors are perpendicular to the motion in the high-speed portions of the flight regime (and thus not subject to this reverse flow condition), so the tiltrotor has relatively high maximum speed—over 300 knots / 560 km