Sailplanes, also known as gliders, are aircraft without engines that rely solely on rising air currents to stay aloft. There are several synonyms for sailplanes such as gliders, soarers, and sailcraft. These terms all refer to aircraft that move through the air without the assistance of an engine, relying instead on thermals or ridge lift. Additionally, some other synonyms include non-powered aircraft, aerotow gliders, and motorless planes. Whatever name you give to them, sailplanes provide a unique and exciting way to experience the thrill of flying without the loud noise of an engine!