Friedrichshafen FF.60

The Friedrichshafen FF.60 was a German experimental floatplane produced by Flugzeugbau Friedrichshafen.
Development and design.
The FF.60 was an experimental large triplane floatplane, powered by four Mercedes D.III engines. Its first flight took place in November 1918, only shortly before the Armistice that ended all further development. Only one was built.