Fokker M.6

The Fokker M.6 was a German two-seat experimental monoplane derived from the M.5 that was built for the Imperial German Army's (Deutsches Heer) Imperial German Air Service (Fliegertruppen des deutschen Kaiserreiches) by the Fokker Aircraft Company (Fokker-Flugzeugwerke) in 1914, shortly before the beginning of the First World War. It fatally crashed after a few test flights. Only one aircraft had been built and development was not continued.

Summary from Wikipedia, photo via Wikimedia Commons, licensed under CC BY-SA.