Curtiss N-9H WWI USAF seaplane

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The Curtiss N-9H was a seaplane version of the famous Curtiss JN-4 trainer used by the US Air Forces during the WWI...The Curtiss N-9H was a seaplane version of the famous Curtiss JN-4 trainer used by the US Air Forces during the WWI. To make the conversion, a single large central pontoon was mounted below the fuselage, with a small float fitted under each wingtip. These changes required a ten-foot increase in wingspan to compensate for the additional weight. Further modifications to the standard Curtiss JN-4 design were required to cope with stability problems that emerged in the N-9H. They included lengthening the fuselage, increasing the area of the tail surfaces, and installing stabilizing fins on the top of the upper wing. The N-9H was initially powered by a 150hp Hispano-Suiza engine.