An aircraft that derives its lift from blades that rotate about an approximately vertical central axis.
An aircraft which borne along by more than one sets of long rotating blades which allow it to hover, relocate any way including reverse, or land; and having a smaller sized group of blades on its end that stabilize the aircraft.
a powered troweling device with spinning blades accustomed distribute concrete.
a winged fresh fruit of certain woods, like ash, elm, and maple
a heavier-than-air aircraft whose lift is provided by the aerodynamic forces on turning blades without on fixed wings. Compared with fixed-wing aircraft.
A flying-machine which revolving screws or revolving helicoidal surfaces tend to be depended upon to maintain the device in the air.
an aircraft without wings that obtains its raise from rotation of expense blades