What is the difference between an Autogiro, an autogyro and a gyroplane?
Gyroplane refers to a class of rotary wing aircraft that depend primarily upon an autorotating rotor for lift (though not necessarily for control, stability or propulsion). Autogiro (always with a capital “A”) is a proprietary term for Cierva and Cierva-licensed gyroplanes while autogyro refers to gyroplanes of the Cierva-type configuration that may or may not be Cierva products.
