Engineless aircraft, also known as gliders (6 letters), are aircraft that do not have an engine and rely on the natural elements such as air currents and thermals to stay in the air. They are typically used for recreational purposes, such as soaring, and can be launched from the ground or towed into the air by another aircraft. Gliders are designed to remain in the air for extended periods of time and can be flown with minimal effort from the pilot.