The SA-321 Super Frelon was developed by the French state-owned firm Sud Aviation to meet military requirements for a multi-role heavy helicopter for the Armée de Terre, Armée de l’Air, and Marine Nationale. The design evolved from the earlier SNCASE SE.3200 Frelon, which had been created to replace Sikorsky H-34/S-58 helicopters used during the Algerian conflict. Developed with assistance from Sikorsky, the Super Frelon first flew on December 7, 1962. By July 1963, a modified aircraft set three international speed records, including a 350.29 km/h mark over 15–25 km, making it the fastest helicopter in the world at the time.
Production began with prototypes in 1962, with series production commencing in September 1964. A total of 110 aircraft were manufactured in France, including two prototypes and four pre-series models, before production ceased in 1981 due to a lack of orders. The aircraft was produced by Sud Aviation, a company formed in 1957 from the merger of SNCASE and SNCASO. In 1969, Sud Aviation merged with Nord Aviation and SEREB to become Aérospatiale, the corporate lineage of which continues today through Airbus Helicopters.
Technically, the Super Frelon is characterized by three Turbomeca Turmo IIIC or IIIC4 turboshaft engines mounted atop the fuselage. In naval configurations, such as the SA-321G, each engine provided approximately 1,171 kW (1,570 hp). The aircraft featured a main rotor diameter of 18.90 meters and a maximum take-off weight of approximately 13,000–13,200 kg. It could transport up to 27 passengers or 15 stretchers, though some high-density configurations allowed for up to 38 equipped troops.
In military service, the French Navy was the primary operator, utilizing the SA-321G for anti-submarine warfare, anti-ship strike (equipped with Exocet missiles and radar), and search and rescue (SAR) roles. The French Navy retired its last units on April 30, 2010, after roughly 40 years of service. Other military operators included Israel, South Africa, Libya, Iraq, and Zaire. The type saw operational use in the Six-Day War, the Gulf War, and conflicts in the former Yugoslavia. Additionally, China produced a licensed version, the Harbin Z-8, which remains the only active variant of the Super Frelon family today. While a 27-seat civilian "heli-liner" variant (SA-321J) was produced, the aircraft was predominantly sold to military customers.