Kaman Aircraft was the original aviation business founded by Charles H. Kaman in Connecticut in 1945, developing into Kaman Corporation. Its helicopter work included intermeshing-rotor aircraft, naval helicopters and specialised external-load machines. The wider company later expanded into aircraft components, structures and other engineering products.[1][2]
Rotor concepts and early aircraft
Kaman established the company around his servo-flap rotor-control concept. The K-125 first flew in January 1947 with intermeshing, counter-rotating rotors. Development led to the K-225, which attracted naval and Coast Guard evaluation orders. A modified K-225 flew with a gas-turbine engine in 1951, demonstrating the propulsion system that would become increasingly important to helicopters. Subsequent aircraft included the H-43 Huskie. These programmes established Kaman as a specialist rotorcraft manufacturer with an approach distinct from the conventional main-rotor and tail-rotor layout.[1]
Naval helicopters and external lifting
The SH-2 Seasprite family served naval requirements including anti-submarine warfare, surveillance and utility operations. Later SH-2G development introduced updated engines, avionics and mission equipment. Kaman also developed the K-MAX for repetitive external-load work, receiving FAA certification in 1994. Its single-seat arrangement and counter-rotating rotors supported operations in which the pilot positions a suspended load rather than carries passengers. Uncrewed K-MAX aircraft developed with Lockheed Martin subsequently supported Marine Corps cargo resupply in Afghanistan, extending the lifting aircraft into remotely operated missions.[1][3]
Diversification and continuing support
Kaman's industrial activities expanded to bearings, seals, wheels, brakes, metallic and composite structures and other aerospace components. Helicopter-related work includes subcontract production and support, modification and restoration of existing aircraft. This broader equipment business reduced the company's dependence on new helicopter production alone. Arcline Investment Management completed its acquisition of Kaman Corporation in April 2024, taking the company private. The transaction encompassed a diversified engineering organisation whose origins remained in Charles Kaman's rotor-control experiments and early Connecticut helicopter manufacturing.[2]