. . "Civilian Autogyros" . . . . . . . . . . . . "gyrocopters" . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . "gyro-copters" . . . . . . . . . . . . . . "Autogyro" . . . . . . . . . . "autogyro/autogiro" . . . . "Gyro" . . . . . . . . . . . . . . "gyroplane" . . . . . "Autogyro" . . "autogiro" . . . . "hybrid helicopter and airplane" . "autogyro" . . . . . . . "Autogyro#Flight_controls" . . . . . . . "rotorcraft" . . . "gyroglider" . "circumnavigate the globe" . . . . . . "gyroplanes" . . . . . . . . . "autogyros" . . . . . . . . "Gyroplane" . . . . . . . . . . . "gyrocopter" . . "Autogiro" . . . "autogiros" . . . . . . . "1923" . "autogyro aircraft" . . . . . . . . . . . . . . . .