Naval Aircraft Factory PN (Paperback)

High Quality Content by WIKIPEDIA articles! The Naval Aircraft Factory PN was a series of American flying boats of the 1920s and 1930s. A development of the Felixstowe F5L flying boat of the First World War, variants of the PN were built for the United States Navy by Douglas, Keystone Aircraft and Martin. The chief long-range patrol flying boats of the United States Navy at the end of the First World War were the Curtiss H.16 and the similar Felixstowe F5L.