Fokker D.IV

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The Fokker D.IV was a biplane fighter designed by the Fokker Aircraft Company during the First World War for the Imperial German Army's Imperial German Air Service. It was a development of the D.I with a more powerful engine and armament. It saw service in limited numbers beginning in late 1916 because structural problems caused by the use of poor-quality components coupled with poor workmanship at the factory. Only a single aircraft is known to have served in a front-line combat unit before all Fokker fighters were withdrawn from those units at the end of 1916 to serve in home defense and training units because of those problems.