The Fokker D.I
(company model M18
) was a development of the D.II
fighter. It was also flown in Austro-Hungarian service as a reconnaissance aircraft under the designation B.III
. Confusing the matter further, both the D.II and D.I arrived at the Front in German service at similar times, in July-August 1916. The main designer was Martin Kreutzer
Design and development
Similar to the D.II, the D.I was an unstaggered
single-bay equal-span biplane. The upper fuselage was parallel with the upper wing. Unlike the D.II, the D.I was fitted with the 100 hp Mercedes D.I
six cylinder watercooled engine.
Control was achieved using wing-warping
. The wings were also tested in twin bay form. To improve visibility, the center section was cut into and the wings were slightly staggered.
These improvements were retained, and the airplane was ordered into production with a 120 hp Mercedes D.II inline engine and a single synchronized LMG 08/15 machine gun. The Austro-Hungarian B.IIIs retained the D.I engine, and were armed with a Schwarzlose machine gun.
Deliveries began in July 1916. 90 were delivered to the German Fliegertruppen
, and 16 to the Austro-Hungarian Luftfahrttruppen
(as the B III). Eight were license produced by the Magyar Általános Gépgyár
One Austro-Hungarian B III was experimentally fitted with a 160 hp Mercedes D.III engine. Another had ailerons instead of wing warping, and still another had long span, swept back wings.
Compared with aircraft in service at that time, such as the Albatros D.II and the Nieuport 11, this Fokker's design and performance were decidedly unimpressive, and further production did not take place.
The D.I was the basis for the D.III and D.IV.
: Austro-Hungarian Imperial and Royal Aviation Troops
- Gray, Peter and Thetford, Owen. German Aircraft since the First World War. London:Putnam, 1962.
- Green William and Swanborough, Gordon. The Complete Book of Fighters. New York: Smithmark, 1994. ISBN 0-8317-3939-8.