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A fixed-wing aircraft is an aircraft capable of flight using wings that generate lift due to the vehicle's forward airspeed and the shape of the wings. Fixed-wing aircraft are distinct from rotary-wing aircraft in which wings rotate about a fixed mast and ornithopters in which lift is generated by flapping wings. A powered fixed-wing aircraft that is propelled forward by thrust from a jet engine or propeller is typically called an aeroplane, aeroplane, or simply a plane. Other types of powered fixed-wing aircraft include powered paragliders and ground effect vehicles. Unpowered fixed-wing aircraft, including gliders, paragliders, hang gliders and kites, can use moving air to gain height.