The Fokker V.17 and its derivatives were a series of experimental monoplane Fighter aircraft produced by the Dutch aircraft company Fokker in the 1910s. V.17, was a shoulder cantilever-winged monoplane with plywood covering. 82 kW (110 hp) Oberursel engine. V.20, was a cantilever mid-winged fighter with plywood covering and was powered by a 119 kW (160 hp) Mercedes D IIIa engine. It was similar to the V.17. V.21 was much like the V.20 except the wings were tapered.