Naval Aircraft Factory PN

PN
Naval Aircraft Factory PN-12
Role	Patrol Flying Boat
Manufacturer	Naval Aircraft Factory
Retired	1938 (PK-1)
Primary user	United States Navy
Developed from	Felixstowe F5L
Variants	Hall PH

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 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 World War I were the Curtiss H.16 and the similar Felixstowe F5L.

The F5L was a license-built version of the British Felixstowe F.5 using the American Liberty engine. The series of Felixstowe flying boats, developed by the Seaplane Experimental Station, had started with improving the hull of the Curtiss H12. The Naval Aircraft Factory, which had built F.5Ls during World War I, continued development of the design, which was redesignated PN-5 in 1922 (although in practice continued to be known as F.5Ls), with the final two being built to an improved design, the F-6L (later designated PN-6). In 1925, the Naval Aircraft Factory produced a version with new wings with an airfoil section of greater maximum lift coefficient. It was powered by experimental 525 hp (391 kW) Wright T-2 piston engines, and was designated PN-7.

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