AgustaWestland AW101. The AgustaWestland AW101 is a medium-lift helicopter used in both military and civil applications. It was developed by a joint venture between Westland Helicopters in the United Kingdom and Agusta in Italy in response to national requirements for a modern naval utility helicopter.
The AgustaWestland AW139 is a 15-seat medium-sized twin-engined helicopter developed and produced principally by AgustaWestland. It is marketed at several different roles, including VIP/corporate transport, offshore transport, fire fighting, law enforcement, search and rescue, emergency medical service, disaster relief, and maritime patrol.
The Aérospatiale SA 330 Puma is a four-bladed, twin-engined medium transport/utility helicopter. The Puma was originally built by Sud Aviation of France, and continued to be made by Aérospatiale. It was also license-built in Romania as the IAR 330; two advanced, unlicensed derivatives, the Denel Rooivalk and Atlas Oryx, were made in South Africa.
NHIndustries NH90. The NHIndustries NH90 is a medium-sized, twin-engine, multi-role military helicopter. It was developed in response to NATO requirements for a battlefield helicopter which would also be capable of being operated in naval environments.
The Sikorsky CH-148 Cyclone is a twin-engine, multi-role shipboard helicopter being developed by the Sikorsky Aircraft Corporation for the Canadian Forces. A military variant of the Sikorsky S-92, the CH-148 is designed for shipboard operations and is intended to replace the venerable CH-124 Sea King, which has been in operation since 1963. The search for a Sea King replacement originally began in the 1980s.
The Sikorsky H-19 Chickasaw, (sold commercially under its Sikorsky model number, S-55) was a multi-purpose helicopter used by the United States Army and United States Air Force. It was also license-built by Westland Aircraft as the Westland Whirlwind in the United Kingdom.
The Sikorsky HH-52 Seaguard (company designation S-62) was a single turbine engine, three-blade rotor amphibious helicopter. Originally developed as a commercial venture by the Sikorsky Aircraft Corporation of Stratford, Connecticut, it was used by the United States Coast Guard primarily for air-sea rescue.
The Sikorsky S-70 is an American medium transport/utility helicopter family manufactured by Sikorsky Aircraft. It was developed for the U.S. Army in the 1970s, winning a competition to be designated the UH-60 Black Hawk and spawning a large family in U.S. military service. New and improved versions of the UH-60 have been developed since. Civilian versions, and some military versions are produced under various S-70 model designations.
Sikorsky S-92. The Sikorsky S-92 is a four-bladed twin-engine medium-lift helicopter built by Sikorsky Aircraft for the civil and military helicopter market. The S-92 was developed from the Sikorsky S-70 helicopter and has similar parts such as flight control and rotor systems.
Sikorsky SH-3 Sea King. The Sikorsky SH-3 Sea King (company designation S-61) is an American twin-engined anti-submarine warfare (ASW) helicopter designed and built by Sikorsky Aircraft. A landmark design, it was the world's first amphibious helicopter and one of the first ASW rotorcraft to use turboshaft engines.