This machine was built for the inventor, Erhard Brunsmann of Berlin-Eichwalde, Germany, by Edmund Rumpler in Berlin-Johannisthal. The tandem wings were driven by a complex patented crank mechanism and it was intended that control would be achieved by differential flapping of the wings, rather than by separate control surfaces. Lange dismisses it in little more than two lines as a “Fehlkonstruktion”.
All Aero 