heavier-than-air aircraft

Heavier-than-air aircraft, such as airplanes, require a power source to generate the thrust needed for lift. Simple examples include kites, which use wind reaction for lift. Manned, unpowered vehicles like hang gliders and gliders rely on being launched to gain altitude. More sophisticated unpowered craft, known as sailplanes, utilize rising air currents for extended flight. Powered heavier-than-air vehicles, from early experimental designs by pioneers like the Wright brothers to modern aircraft, overcome gravity through aerodynamic principles, primarily lift generated by wings and thrust from engines.123