01/31/2009. Remarks by Johan Visschedijk: "The experimental FS-28 Avispa (Wasp) was built by the Akaflieg Stuttgart, assisted by the University of Stuttgart and aircraft manufacturer Wolf Hirth, with the aim to transfer high-quality aerodynamic glider shapes to powered aircraft.

Materials used were glass-reinforced plastic, rigid foam, and aluminum, the power plant was an 115 hp four-cylinder horizontally-opposed, air-cooled Lycoming O-235-E2A. Construction was started in 1969 and D-EAFS flew for the first time on December 20, 1972."