WWI Aircraft can be summarized as two different types of planes used during World War I. The SPAD (4 letters) was a French biplane fighter aircraft developed by Societe Pour L'Aviation et ses Derives. It was one of the most capable fighters of the war and was used by many Allied air forces. The Triplane (8 letters) was a German fighter aircraft developed by Fokker-Flugzeugwerke. It was used by the German Air Force during WWI and was known for its maneuverability and speed.