Assertion: helicopter's rotor | /r/Synonym | proprotor
Facets:
value: sometimes
type: TEMPORAL
Source sentences:
text: A tiltrotor is an aircraft which generates lift and propulsion by way of one or more powered rotors (sometimes called proprotors) mounted on rotatable engine pods or nacelles usually at the ends of a fixed wing or an engine mounted in the fuselage with drive shafts transferring power to rotor assemblies mounted on the wingtips.