WAerial Reconfigurable Embedded System
WAérospatiale Ludion
WAirbus A³ Vahana
WAnnular lift fan aircraft
WArmstrong Whitworth AW.681
WAvro Canada VZ-9 Avrocar
WFairey Rotodyne
WFocke Rochen
WHiller VZ-1 Pawnee
WJoint Combat Aircraft
WKayaba Heliplane
WLift fan
WLift jet
WLunar Landing Research Vehicle
WMartin Jetpack
WNorthrop Grumman Tern
WPowered lift
WRolls-Royce Thrust Measuring Rig
WSikorsky S-72
WSkyRider X2R
WSoloTrek XFV
WTiltjet
WVTOL X-Plane
WWilliams X-Jet