panel. This format was continued with the E.III. The E.II was built in parallel with the E.I and the choice of whether an airframe became an E.I or E.II depended on the availability of engines. In total, Fokker production figures state that 49 E.IIs were built and 45 of these had been delivered to the Western Front Fliegertruppe by December 1915 (Luftstreitkräfte from October 1916 onwards) at which time production switched to the main Eindecker variant, the Fokker E.III, which used the same 75 kW (100 hp) Oberursel U.I engine. Some E.IIs under production were completed as E.IIIs and numerous E.IIs returned to Fokker's factory for repair were upgraded to E.III specification. Operators Specifications (E.II) 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. . 1910s German fighter aircraft E.II Single-engined tractor aircraft Aircraft first flown in 1915 Rotary-engined aircraft