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P2V-4 (P-2) Neptune

The P2V-4 airplane was designed for use as a day and night land-based, anti-submarine, long range patrol airplane. Its secondary tactical missions were rocket attack, night torpedo attack, mine laying, bombing, and photo reconnaissance.

The P2V-4 was developed from the P2V-3, with strengthening of structure to permit operation at higher gross weights. Like the P2V-3, the P2V-4 has an all-metal semi-monocoque fuselage with wings of conventional two-spar dural construction.

It had a crew of seven, Fowler-type wing flaps with aileron droop, "varicam" stabilizer, thermal anti-icing of wing, tail surfaces and windshield, and 50 gallons of water for combat power. Propellers were fitted with electrical de-icing. A K-25 camera and D-1 flasher were carried. A right hand wing-tip nacelle carried an AN/APS-31 attack radar, or alternately a 300 gallon tip tank. Eight rocket launchers were mounted under each wing and could accomodate the 5" HVAR or HPAG rockets. The first flight of the prototype was January 1948; first flight of the pilot model was September 1949; and it entered service in March 1950.

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