A jet aircraft is powered by jet engines, which produce thrust by expelling hot gases at high speeds through a nozzle. This propulsion method allows jets to achieve high speeds and altitudes efficiently, making them suitable for various roles including passenger transport, military combat, cargo hauling, and private aviation. Jet aircraft range in size from small business jets and private planes to large commercial airliners and military fighters. They are characterized by their speed, range, and ability to operate in a wide range of conditions and environments.