Felixstowe F.5

The Felixstowe F.5 was a refinement if the F.3 with a strengthened hull and balanced control surfaces. It arrived too late to see operational service. In a strange twist, the F.5 was taken up and produced after the war in America, so the line of flying boats that started with the Curtiss H-12 "Large America" had passed from the F.2, F.3, and finally returned to the USA in the F.5. The American version used twin 400hp Liberty engines and was designed the F-5L. Fifteen F.5s were purchased by Japan in 1921.