P.Grosz, G.Haddow, P.Shiemer Austro-Hungarian Army Aircraft of World War One

Hocke Experimental Biplane

  In December 1917, aerodynamic and stability tests of a model of the Hocke aircraft (also written Holcker in Flars records) were underway in Professor Knoller's vertical wind tunnel. Satisfactory results led to the construction of a full-sized prototype powered by a four-cylinder Hiero engine. No information, other than photographs, has been found to explain the purpose of this unusual experimental aircraft.