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 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 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.