The first design of brothers Franz and Josef Spiller in Graz, Austria. It was exhibited in Graz in June 1910 before tests on the Graz flying field Thalerhof. The engine was a 50 hp Austro-Daimler automobile motor similar with that which Etrich also had no joy in Spring 1910 (before Ferdinand Porsche designed an aero engine of it). The Spillers later that year changed to a Puch aero engine, also built in Graz. Details of their achievements are almost undocumented, but they were experimenting at Thalerhof at least until 1912, with more or less success.
All Aero 