Jet aircraft are airplanes powered by jet engines, which use the principle of jet propulsion to generate thrust. These engines work by expelling high-speed exhaust gases, allowing the aircraft to fly at high speeds and altitudes. Jet aircraft are commonly used for commercial air travel, military operations, and cargo transport. The design of jet aircraft includes features like a streamlined fuselage and wings optimized for aerodynamic efficiency. They can vary in size, from small private jets to large commercial airliners like the Boeing 747. Jet aircraft have revolutionized air travel, making it faster and more accessible for people around the world.