Naval Aircraft Factory PN
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The Naval Aircraft Factory PN was a series of open cockpit American flying boats of the 1920s and 1930s. A development of the Felixstowe F5L flying boat of the World War I, variants of the PN were bui
Naval Aircraft Factory PN-12
Naval Aircraft Factory PN-9, illustrating the characteristic hull chines
Douglas PD-1s of VP-4 over Hawaii, in 1930
A Keystone PK-1
Hall PH
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The Hall PH was an American flying boat of the 1930s. It was a twin-engined biplane, developed from the Naval Aircraft Factory PN and could hence trace its lineage back to the Felixstowe flying boats
Naval Aircraft Factory PN
…while the PM-1 and PM-2 also had an enclosed cockpit, and the PK-1 had a modified hull form with a sharper bow. These also formed the basis for the Hall PH flying boats, with a different hull fitted with an enclosed cockpit, and some of these remained in service until World War II. The early prototypes of…
Hall PH-3
XPH-1 prototype in flight. Note the open pilots cockpit.