During World War II, the company built DFS Habicht training gliders, as well as tailplane assemblies for the Messerschmitt Bf 109. The company also built a research aircraft, the Göppingen Gö 9 to investigate Claude Dornier's rear-mounted "pusher" propeller plans. With its cruciform tail, this aircraft was to be a stepping-stone towards the revolutionary Dornier Do 335 Pfeil.