Fokker D.III
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The Fokker D.III (Fokker designation M.19) was a German single-seat fighter aircraft of
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
. It saw limited frontline service before being withdrawn from combat in December 1916.


Design and development

The M.19 began as an effort to improve the performance of the
Fokker D.II __NOTOC__ The Fokker D.II was a German fighter biplane of World War I. It was a single-seat fighter aircraft developed before the Fokker D.I. It was based on the M.17 prototype, with single-bay unstaggered wings and a larger fuselage and short ...
(Fokker designation M.17).Gray and Thetford 1962, p. 92. The M.19 featured the
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U.III 14-cylinder, two-row rotary engine, combined with the two-bay wing cellule of the Fokker D.I. The U.III engine, first used in the Fokker E.IV, required a revised fore-and-aft mount and a strengthened fuselage. The prototype M.19 arrived at Adlershof for testing on 20 July 1916. '' Idflieg'' issued a production order for 50 aircraft at that time, followed by orders for an additional 60 aircraft in August and 100 in November. The new aircraft was designated D.III by ''Idflieg''.


Operational history

The first seven production aircraft were delivered on 1 September 1916.Leaman 2003, p. 23. On that date, two D.III aircraft were ferried from ''Armee Flug Park'' 1 to ''Jagdstaffel'' 2 at Bertincourt.VanWyngarden 2007, p. 10.
Oswald Boelcke Oswald Boelcke PlM (; 19 May 1891 – 28 October 1916) was a World War I German professional soldier and pioneering flying ace credited with 40 aerial victories. Boelcke is honored as the father of the German fighter air force, and of air ...
received serial 352/16 and obtained seven victories in it between 2 September and 15 September.VanWyngarden 2006, p. 76. While the D.III offered better performance than the D.I and D.II, Boelcke nevertheless found the D.III to be too slow.Weyl 1965, p. 171.Lamberton 1960, p. 120 The D.III was plagued by its U.III engine, which wore out quickly and was difficult to manufacture.Weyl 1965, pp. 122-123. Low compression resulted in poor performance at altitudeWeyl 1965, p. 123. and cooling of the rear row of cylinders proved problematic. Moreover, the D.III offered indifferent maneuverability.Weyl 1965, p. 173. On Boelcke's recommendation, the D.III was withdrawn from heavily contested sectors of the Western Front, but it continued to serve in quieter sectors.Weyl 1965, p. 171. In early October 1916, evaluation of Fokker's M.21 prototype at Adlershof revealed poor construction and workmanship.Leaman 2003, p. 23. In response, ''Idflieg'' directed that a production D.III be tested for quality control purposes.Leaman 2003, p. 23. In November 1916, serial 369/16 was disassembled and tested to destruction at Adlershof.Weyl 1965, p. 172. While the wings proved acceptable, the fuselage and tail surfaces failed to meet specifications.Leaman 2003, p. 23.Weyl 1965, p. 172. ''Idflieg'' reprimanded Fokker for his firm's substandard construction practices, but permitted D.III production to continue.Leaman 2003, p. 23. The ''Kogenluft'', however, forbade the use of Fokker aircraft for frontline duties.Leaman 2003, p. 23. Fokker built 210 D.III aircraft at its
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factory before production ceased in the spring of 1917. Late production aircraft replaced the
wing-warping Wing warping was an early system for lateral (roll) control of a fixed-wing aircraft. The technique, used and patented by the Wright brothers, consisted of a system of pulleys and cables to twist the trailing edges of the wings in opposite direc ...
system with horn-balanced ailerons on the upper wing. Though unsuitable for frontline service, the D.III continued to serve in home defense units until late 1917.Weyl 1965, p. 171. In October 1917, Germany supplied 10 D.IIIs to the
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.Green and Swanborough 1994, p. 221. These aircraft remained in service with the ''Luchtvaartafdeling'' until 1921. Boelcke's D.III, serial 352/16, survived the war to be displayed at the ''
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'' museum in
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. The aircraft was destroyed by an Allied bombing raid in 1943.


Operators

; *''
Luftstreitkräfte The ''Deutsche Luftstreitkräfte'' (, German Air Force)—known before October 1916 as (Flyer Troops)—was the air arm of the Imperial German Army. In English-language sources it is usually referred to as the Imperial German Air Service, alth ...
'' ; * ''Luchtvaartafdeling''


Specifications


References


Notes


Bibliography

* * Gray, Peter and Owen Thetford. ''German Aircraft of the First World War''. London: Putnam, 1962. *Green, William and Gordon Swanborough. ''The Complete Book of Fighters''. New York: Smithmark, 1994. . * Lamberton, W.M., and E.F. Cheesman. ''Fighter Aircraft of the 1914-1918 War''. Letchworth: Harleyford, 1960. . * Leaman, Paul. ''Fokker Dr.I Triplane: A World War One Legend''. Hersham, Surrey, UK: Classic Publications, 2003. . * VanWyngarden, Greg. ''Early German Aces of World War I (Aircraft of the Aces No. 73).'' Oxford: Osprey Publishing, 2006. . * VanWyngarden, Greg. ''Jagdstaffel 2 Boelcke: Von Richthofen's Mentor (Aviation Elite Units No. 26).'' Oxford: Osprey Publishing, 2007. . * Weyl, A.R. ''Fokker: The Creative Years''. London: Putnam, 1965. . * Woodman, Harry. ''Spandau Guns (Windsock Mini Datafile No.10)''. Berkhamsted, Herts, UK: Albatros Publications, 1997. . {{World War I Aircraft of the Central Powers 1910s German fighter aircraft D 03 Biplanes Rotary-engined aircraft Aircraft first flown in 1916