M.Dusing German & Austro-Hungarian Aero Engines of WWI. Vol.3 (A Centennial Perspective on Great War Airplanes 66)

John Wenskus ("Volt"), Cologne

  German aviation pioneer John Wenskus is among the many designers who devoted themselves to aviation with selfless dedication, usually without large financial reserves. Wenskus founded an aircraft engine workshop in Berlin-Johannisthal in 1911 to build and test his own engines.
  John Wenskus became famous for a small, dainty monoplane made of steel and wood, equipped with a radial engine, also of his own design, to which he gave the name "Volt-Motor".
  Despite the proximity to many pilots and aircraft companies, no commercial successes occurred. In December 1913, Wenskus closed his shed and moved to Cologne with his aircraft and completed engines to continue his work at Cologne-Butzweilerhof.