The Fokker V.4 was a prototype German fighter aircraft of World War I.

Inspired by the successful Sopwith Triplane, Anthony Fokker chose to create a triplane fighter.

The V.4 looked very much like the later Dr.I, but is easily recognized by the lack of interplane struts.

Aero Historian Peter M. Grosz finally corrected the error while researching Fokker fighter developments.

The V.4 was eventually fitted with V.5 wings and sent to Austria-Hungary for evaluation.