E.II and, as the first E.Is were entering service in June 1915, the first of the E.II type was being demonstrated by Anthony Fokker. Nevertheless, E.I production continued in parallel with the E.II, depending on the availability of the Oberursel engines. By 1916, a total of 54 had been manufactured and delivered to the German Army, Navy and the Austro-Hungarian army. Operators Kaiserliche und Königliche Luftfahrtruppen Luftstreitkräfte Imperial German Navy Ottoman Air Force Specifications (E.I.) See also References Notes Bibliography Boyne, Walter J. The Smithsonian Book of Flight for Young People. Washington, DC: Smithsonian Institution, 1988. . Dierikx, Marc. Fokker: A Transatlantic Biography. Washington, DC: Smithsonian Institution Press, 1997. . Grosz, Peter M. Fokker E I/II (Windsock Datafile No. 91). Berkhamsted, Herts, UK: Albatros Publications, 2002. . Jarrett, Philip. "Database: The Fokker Eindeckers". Aeroplane Monthly, December 2004. vanWyngarden, Greg. Early German Aces of World War I (Osprey Aircraft of the Aces 73). Botley, Oxfordshire, UK: Osprey, 2006. . Winchester, Jim. Fighter: The World's Finest Combat Aircraft – 1913 to the Present Day. New York: Barnes & Noble Publishing, Inc. and Parragon Publishing, 2006. . E.I 1910s German fighter aircraft Military aircraft of World War I Single-engined tractor aircraft Mid-wing aircraft Aircraft first flown in 1915 Rotary-engined aircraft