Autogiros, also known as gyroplanes or gyrocopters, are aircraft that use unpowered rotors to generate lift. These aircraft have been around for over a century and have been used for a variety of purposes, including military reconnaissance, rescue operations, and recreational flying. Some synonyms for autogiros include autogyros, gyroplanes, gyrocopters, rotary-wing aircraft, and rotary-wing planes. While all of these terms refer to aircraft that use unpowered rotors, there are some differences in the design and capabilities of each type. For example, gyroplanes are typically smaller and more maneuverable than traditional helicopters, making them well-suited for short-range flights and aerial photography.