The Fokker V.9 was part of a series of experimental aircraft which led up to the low-production D.VI fighter. The aircraft were very similar, varying in detail and power plants. The V.9 was powered by a 60 kW (80 hp)

Oberursel Oberursel (Taunus) () is a town in Germany and part of the Frankfurt Rhein-Main urban area. It is located to the north west of Frankfurt, in the Hochtaunuskreis county. It is the 13th largest town in Hesse. In 2011, the town hosted the 51st He ...

and first flew in December 1917; all others flew in 1918. The V.12 was powered by an experimental 119 kW (160 hp), Steyr-

Le Rhône Le Rhône was the name given to a series of popular rotary aircraft engines produced in France by Société des Moteurs Le Rhône and the successor company of Gnome et Rhône. They powered a number of military aircraft types of the First Worl ...

engine. The V.14. Like the V.12, the V.14 was powered by the 119 kW (160 hp) Steyr-Le Rhone. The V.16 was powered by the 81 kW (110 hp) Oberursel Ur. II. The V.33 was a development of the V.9. It was tested with both 82 kW (110 hp) and 108 kW (145 hp) Oberursel engines.

References

* http://www.dutch-aviation.nl/index5/Military/index5-1%20Fokker%20Military%20Aircrafts.html 1910s German fighter aircraft V.09 Rotary-engined aircraft Single-engined tractor aircraft Biplanes Aircraft first flown in 1917 {{germany-stub