Boyne, Walter J. The Smithsonian Book of Flight for Young People.
Fokker | Fokker Dr.I | Fokker D.VII | Fokker 100 | Fokker 50 | Fokker F.VIII | Fokker F.VII | Fokker F28 Fellowship | Fokker F27 Friendship | Fokker V.17 | Fokker M.5 | Fokker F27 "Friendship' | Fokker D.XXI | Fokker D.XIII | Fokker C.X | Fokker 70 | Menckhoff's Fokker D.VII of Jasta 72 (marked with prominent letter "M"s) at Bergnicourt | Fokker M.7 | Fokker-Leimberger | Fokker F.XXXVI | Fokker F.25 | Fokker F.14 | Fokker F.10 | Fokker D.II | Fokker C.V |
A second competition in May and June led to the acceptance of several of the main contest entries, the Pfalz D.XII, Fokker E.V, Junkers D.I and Siemens-Schuckert D.IV, the later of which is considered by many to be Germany's best design of the war.
This unremarkable and derivative design was, however, transformed into a formidable fighter when it was fitted with the newly developed synchronizer gear, the Fokker Stangensteuerung, firing a single 7.92 mm (.312 in) Parabellum LMG 14 or Spandau lMG 08 machine gun through the spinning propeller.
The removal of the left-side gun is believed to have been pioneered on Oswald Boelcke's E.IV, believed to have borne IdFlieg serial 123/15, with a simpler double-synchronisation system used on the retained center-line and right side MG 08 Spandau guns.
In the late afternoon of 18 June 1916, Immelmann led a flight of four Fokker E.III Eindeckers in search of a flight of eight F.E.2b reconnaissance aircraft of 25 Squadron Royal Flying Corps over Sallaumines in northern France.