In response to the loss of air superiority in late 1917, the Germans organized a competition for new fighter designs held in January 1918. The in-line engine winner was the Fokker D.VII. The D.VII's unique ability to seemingly "hang on its propeller," and fire into the unprotected underside of enemy aircraft made it a highly feared combat opponent. Highlighted in this image is a tire of the Fokker D.VII.