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Unpowered aircraft

2:37

Unpowered precise landing of an airplane Aeroprakt 22LS Foxbat

2:53

Soaring over Boulder in an unpowered sailplane

1:03

Unpowered control line airplane

3:35

Aerium's Robird Ornithopter Drone V3

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Flying a Glider

Unpowered aircraft can remain airborne for a significant period of time without onboard propulsion. They can be classified as fixed-wing gliders, lighter-than-air balloons and tethered kites. This requires a trajectory that is not merely a vertical descent such as a parachute. In the case of kites, lift is obtained by tethering to a fixed or moving object, perhaps another kite, to obtain a flow of wind over the lifting surfaces. In the case of balloons, lift is obtained through inherent buoyancy and the balloon may or may not be tethered. Free balloon flight has little directional control. Gliding aircraft include sailplanes, hang gliders, and paragliders that have full directional control in free flight.
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