SH-3A Sea King

The Sikorsky SH‑3A Sea King, introduced in the late 1950s, was the first amphibious anti‑submarine warfare helicopter to enter service with the United States Navy. Developed by Sikorsky Aircraft Corporation, the SH‑3A first flew on 14 July 1959 and was delivered to the fleet in 1961. Its twin‑engine, turboshaft design – powered by two General Electric T58‑10 engines – gave the aircraft reliable performance over water and in adverse weather, while the flush‑mounted main rotor reduced drag and allowed operation from the decks of medium‑size carriers. The Sea King could carry a 1,200‑pound sonar buoy, magnetic anomaly detector, and a variety of torpedoes or depth charges, making it a formidable platform for detecting and engaging enemy submarines during the Cold War. The spacious, climate‑controlled cabin also accommodated up to 16 troops or a medevac litter, leading to later variants used for search‑and‑rescue, transport, and VIP missions. Over 800 units were built, and the SH‑3A set standards for amphibious helicopter design, influencing subsequent generations such as the SH‑60 Seahawk. Its long service life and adaptability cement the SH‑3A Sea King as a milestone in naval aviation history.

Sikorsky Aircraft Corporation

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Design & Classification