P2V-5 Neptune

The Lockheed P2V-5 Neptune was a long‑range maritime patrol and anti‑submarine aircraft developed in the late 1940s for the United States Navy. Evolving from the earlier P2V‑1 and P2V‑2 models, the P2V‑5 entered service in 1950 and quickly became the Navy’s primary ocean‑going reconnaissance platform during the early Cold War. Powered by two Wright R-3350 radial engines augmented by Pratt & Whitney J60 turbo‑jets, the Neptune achieved a maximum speed of 300 knots and a range exceeding 4,000 nautical miles, allowing triple‑hour patrols over the Atlantic and Pacific. Its high‑mounted straight wing incorporated a large fuel capacity and the distinctive “flying boat” hull shape, which permitted emergency water landings.

Key features included a sophisticated radar and magnetic anomaly detector suite, ventral bomb‑bay with depth‑charge and torpedo capability, and a pressurized crew compartment for up to nine personnel. The P2V‑5’s versatility extended to electronic intelligence, weather reconnaissance, and even nuclear weapons delivery during the Korean War. By demonstrating reliable long‑range endurance and advanced sensor integration, the Neptune set a benchmark for subsequent maritime patrol aircraft such as the P‑3 Orion, cementing its place in aviation history as a cornerstone of U.S. naval air power.

Lockheed Corporation

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