AS365 Dauphin

AS365 Dauphin
Name	AS365 Dauphin
Type	Medium twin-engine helicopter
Manufacturer	Aérospatiale / Eurocopter / Airbus Helicopters
First flight	1975
Introduced	1976
Status	In service

AS365 Dauphin The AS365 Dauphin is a French-built twin-engine, medium-weight helicopter developed by Aérospatiale and later produced by Eurocopter and Airbus Helicopters. It has served in civil, law enforcement, search and rescue, and military roles with operators including French Navy, United States Coast Guard, Royal Navy, and numerous commercial Helicopter Maritime Services providers. The airframe and systems lineage influenced and intersected with programs such as the SA 365 N Dauphin 2, HH-65 Dolphin, and international rotorcraft development efforts involving Sikorsky Aircraft, AgustaWestland, and Bell Helicopter.

Design and Development

The Dauphin emerged from design work at Aérospatiale alongside contemporaries like the SA 330 Puma, SA 341 Gazelle, and collaborations with MBB and Westland Helicopters. Initial design prioritized a fenestron tail rotor, semi-monocoque fuselage, and retractable landing gear similar to concepts in the Gazelle and Super Puma families. The powerplant selection considered turboshafts from Turbomeca—including Turbomeca Arriel variants—and alternatives such as engines from GE Aviation and Honeywell Aerospace. Avionics suites incorporated systems compatible with equipment used by NATO members, Civil Aviation Authorities in Europe, and maritime standards like those specified by International Civil Aviation Organization and European Union Aviation Safety Agency. Airframe upgrades paralleled technologies found in NHIndustries NH90 and AgustaWestland AW139 programs, influencing survivability, de-icing, and vibration reduction systems. Industrial changes at Aérospatiale-Matra and the subsequent formation of Eurocopter Group affected production, subcontracting to suppliers including Messier-Dowty, Safran, Goodrich Corporation, and avionics firms such as Thales Group, Rockwell Collins, and Garmin.

Variants

Multiple variants were developed for civil and military missions, reflecting parallel developments like the HH-65 Dolphin used by the United States Coast Guard and export models employed by navies including the Hellenic Navy and Brazilian Navy. Notable versions included the SA 365 N, SA 365 C, AS365 N2, AS365 N3 powered by higher-thrust Turbomeca Makila or Turbomeca Arriel engines, and militarized adaptations with mission suites akin to configurations used on Westland Lynx and Sea King platforms. Civil search and rescue configurations featured equipment comparable to kits on the Eurocopter EC225 and AgustaWestland AW101, while offshore oil support builds matched standards set by operators servicing fields like the North Sea and companies such as BP, Shell, and ExxonMobil. Special mission derivatives included law-enforcement outfittings analogous to those employed by Los Angeles Police Department, Metropolitan Police Service, and Royal Canadian Mounted Police, as well as VIP interiors similar to conversions for Airbus Corporate Helicopters clients.

Operational History

The Dauphin entered service with agencies like the French Navy, commercial operators in Norway, United Kingdom, and Australia, and public service users including SAPEURS-POMPIERS and coast guard organizations comparable to the Coast Guard Administration (Taiwan). Deployments supported search and rescue missions during incidents such as North Sea evacuations and Mediterranean maritime rescues coordinated with European Maritime Safety Agency operations. Military users employed the type for anti-surface and utility tasks influenced by doctrines from NATO and procurement seen in the Hellenic Air Force and Japan Coast Guard acquisitions. Oil-and-gas support missions mirrored routing patterns servicing platforms owned by Statoil, TotalEnergies, and Chevron. The type also took part in humanitarian relief efforts in regions affected by disasters where agencies like United Nations Office for the Coordination of Humanitarian Affairs coordinated multinational air support, working alongside transport assets such as the C-130 Hercules and rotary-wing types including the UH-60 Black Hawk.

Specifications

Typical AS365 N3 specifications include twin Turbomeca Arriel 2C2 engines (or similar), cruise speeds comparable to the AgustaWestland AW109, seating for crew and passengers analogous to layouts used in Sikorsky S-76, and range/capacity figures used in offshore support roles. Avionics packages often integrated systems from Thales Group, Honeywell Aerospace, and Garmin, while safety equipment matched standards from International Civil Aviation Organization and maritime SAR outfitting used by coast guard services worldwide. Performance and dimensions placed the Dauphin class alongside helicopters like the Bell 412 and Eurocopter EC155 in payload, speed, and endurance metrics.

Operators

Civil, parapublic, and military operators included European national services such as the French Navy, Royal Air Force, and Gendarmerie Nationale, coast guard organizations like the United States Coast Guard and Japan Coast Guard, and commercial fleets serving companies including Bond Offshore Helicopters, CHC Helicopter, and Bristow Group. Other state operators comprised the Hellenic Coast Guard, Brazilian Navy, Royal Canadian Air Force, and various police agencies such as the Metropolitan Police Service and Dutch National Police for public safety missions.

Accidents and Incidents

Accidents involved operators in maritime, offshore, and law-enforcement contexts, with notable events prompting investigations by authorities like the Bureau d'Enquêtes et d'Analyses pour la Sécurité de l'Aviation Civile, National Transportation Safety Board, and equivalent national safety boards. Incidents influenced airworthiness directives issued by European Union Aviation Safety Agency and operational guidance adopted by companies such as CHC Helicopter and Bristow Group, and led to upgrades similar to retrofits pursued for other types including the Eurocopter AS332 Super Puma and Sikorsky S-92.

Category:Helicopters