Friedrichshafen FF.53

The Friedrichshafen FF.53 was a German torpedo-carrying biplane floatplane of the 1910s produced by Flugzeugbau Friedrichshafen.

Development and design
The FF.53 was a twin-engined biplane floatplane, designed to carry a torpedo and powered by two Mercedes D.IVa engines. It was a development of the Friedrichshafen G.III heavy bomber. Only three aircraft were built.