Gyroplane

A gyroplane, also known as an autogiro, is a type of rotary-wing aircraft that uses unpowered, rotating airfoils for lift. It employs a propeller for forward motion. Unlike a helicopter, the gyroplane's rotor is not engine-driven and relies on autorotation, where airflow through the rotor causes it to spin and generate lift. This design helped overcome control issues that initially hindered helicopter development. While the gyroplane was once a viable alternative for vertical flight, its commercial prospects diminished with the rise of the helicopter. However, sport versions, often referred to as "gyroplanes," remain popular.123