Kaman H-2 Seasprite

The Kaman H‑2 Seasprite is a compact, twin‑engine helicopter that entered service in the early 1950s, becoming one of Kaman Corporation’s most enduring designs. Developed from the earlier K‑125 prototype, the Seasprite first flew on 6 February 1953 and was rapidly adopted by the United States Navy for anti‑submarine warfare, utility transport, and search‑and‑rescue missions. Its distinctive intermeshing rotor system, derived from Kaman’s pioneering coaxial technology, eliminated the need for a tail rotor, providing greater lift efficiency, reduced vibration, and a compact footprint suited to ship‑board operations. Powered initially by two Lycoming O‑435 radial engines and later upgraded to more reliable Allison T63 turboshafts, the H‑2 could carry up to four crew members and a modest payload of equipment or weapons. Throughout the 1960s and 1970s the Seasprite served with several NATO navies and civilian operators, demonstrating versatility in harsh maritime environments. Although production ended in the early 1970s, the aircraft’s innovative rotor layout and reliable performance influenced later naval helicopters and cemented Kaman’s reputation as a pioneer of unconventional rotorcraft design. Today, restored examples appear at air shows, preserving its legacy for future generations.

Kaman Corporation

Classification

Dimensions

Production & History

Design & Classification