Dr.I 1917 prototype single seat triplane fighter. D.I 1917 prototype single seat biplane fighter. The second and third prototypes differed little from the first except in detail. A triplane version was built as the Dr.I. Three prototypes were ordered, but after the first two were involved in serious crashes, one of which killed flying ace Walter Höhndorf on September 5, 1917, development was cancelled. The AEG D.I was a biplane fighter of World War I.
