Naval Aircraft Factory PN

The Naval Aircraft Factory PN was the designation for a series of closely related flying boats that were developed from the Curtiss F-5L, an American version of the British Felixstowe F.5, which was in turn the final member of a series of flying boats developed from the earlier Curtiss H-4. The last members of the PN family didn’t retire from US service until 1944, extending the life of the Curtiss H and Felixstowe F families across both World Wars!