Fokker D.I

The Fokker D.I, company designation M.18, was a German biplane fighter of World War I developed from the D.II and mainly designed by Martin Kreutzer. It was an unstaggered, single-bay, equal-span biplane with a six-cylinder water-cooled Mercedes inline engine, and wing warping rather than ailerons for control. Production aircraft used the 89 kW Mercedes D.II engine and one synchronized 7.92 mm machine gun. Deliveries began in July 1916, with 90 going to the German Fliegertruppen and 17 to the Austro-Hungarian Luftfahrttruppen, which flew them as the B.III fighter trainer. Its performance compared poorly with the Albatros D.II and Nieuport 11, so production ended, though it was the basis for the D.IV.