The Goodyear GA-400R Gizmo is a one-man helicopter proposed in the 1950s for duties such as liaison and observation.
The rotor blades have wooden cores with fiberglass surfaces.
The Gizmo has demonstrated low autorotation sink rates of 1200 ft/min.
[3] The GA-400R was tested by the United States Navy in 1957 at Patuxent River Naval Air Base in Maryland.
[4] Data from Jane's All the World's Aircraft 1958-59[5]General characteristics Performance