Aérospatiale AS350 Écureuil

Aérospatiale AS350 Écureuil
Name	Aérospatiale AS350 Écureuil
Type	Utility helicopter
Manufacturer	Aérospatiale / Eurocopter / Airbus Helicopters
First flight	1974
Introduced	1977
Status	In production

Aérospatiale AS350 Écureuil is a single-engine light utility helicopter developed in France by Aérospatiale and later produced by Eurocopter and Airbus Helicopters, serving with civil operators and armed forces worldwide. The type traces lineage to rotorcraft projects influenced by designs from Sud Aviation and contemporary developments interacting with platforms such as the Bell 206 and Sikorsky S-76, and has been employed in roles ranging from aerial work for BP and Shell to air ambulance operations alongside operators like Airbus Helicopters UK and CHC Helicopter. The model has seen service in diverse environments from the mountains of Alps and Himalayas to the coasts of Mediterranean Sea and the Arctic ranges near Svalbard.

Development and Design

The AS350 originated from a French requirement managed by Aérospatiale during the 1970s alongside contemporaneous rotorcraft projects at Westland Helicopters and MBB, and was designed with a five-seat cabin influenced by aerodynamic research from ONERA and structural practices found on the SA 341 Gazelle. Its design emphasised a single Turbomeca or later Safran Helicopter Engines powerplant similar in concept to engines used on the Eurocopter AS365 Dauphin and incorporated a three-bladed main rotor whose dynamic characteristics echoed research conducted at National Aerospace Laboratory facilities that advised programs like the NHIndustries NH90. Airframe features include a semi-rigid rotor hub influenced by practices from Bell Helicopter Textron and crashworthy fuel systems meeting standards comparable to those adopted by Federal Aviation Administration and European Union Aviation Safety Agency. The cockpit ergonomics were shaped by consultation with operators such as Électricité de France and emergency services like London Ambulance Service and Sûreté du Québec.

Variants and Modifications

Production variants evolved under Aérospatiale and later Eurocopter branding, including early AS350 B and B1 models and the high-performance AS350 B3 developed for high-altitude operations akin to modifications seen on the Kamov Ka-32; later Series upgrades paralleled modernization trends exemplified by the AgustaWestland AW109 and included avionics suites similar to those from Garmin and Honeywell. Twin-engine conversions and stretched fuselage modifications were produced by aftermarket firms such as Sikorsky Aircraft subcontractors and independent companies aligned with standards from Civil Aviation Administration of China and Transport Canada. Specialized equipment fitments—winches, cameras, external loads—reflect operational packages comparable to those used by National Geographic and broadcasters like BBC and CNN for aerial filming, while surveillance mods mirror systems used by Gulfstream and Lockheed Martin avionics integrators.

Operational History

The AS350 entered service with utility operators in the 1970s, rapidly finding customers among energy companies like ExxonMobil and tour operators servicing destinations linked to Grand Canyon National Park and Victoria Falls, and has been deployed for law enforcement missions by agencies such as Royal Canadian Mounted Police and Los Angeles Police Department. Mountain rescue units in France, Switzerland, and Nepal adopted the platform for high-altitude missions, operating alongside organizations like ICRC and UNICEF in humanitarian relief contexts similar to spruce-ups used in Bosnia and Herzegovina and Haiti responses. The type has also been a popular choice for aerial firefighting and utility work comparable to roles flown by Erickson Inc. and Siller Systems contractors.

Technical Specifications

Typical technical data for common subvariants include a single Safran turboshaft delivering shaft horsepower comparable to engines installed on the AgustaWestland AW139, a maximum cruise speed in the range of speeds similar to the Bell 407, an operational ceiling used in flights near the K2 and Mount Everest approaches, and a useful load capacity deployed in roles analogous to Sikorsky S-70 external load operations; avionics packages often feature navigation components from Thales Group and communication suites aligned with Rockwell Collins. The rotor system, transmission, and tailboom share design philosophies with other Eurocopter models and meet certification criteria established by EASA and FAA.

Operators and Civil Use

Civil operators include flightseeing companies operating in tourism hubs such as Grand Canyon National Park, Yellowstone National Park, and Banff National Park, charter firms supporting corporations like TotalEnergies and Chevron, and emergency medical services run by entities like St John Ambulance and municipal health trusts similar to NHS England. Commercial film and media outfits including Reuters and Associated Press have employed the type for aerial cinematography, while aerial crane and lifting contractors working for firms such as Bechtel and Fluor Corporation use the aircraft for construction support reminiscent of services provided by Heli-Work operators.

Military and Government Service

Several armed forces and government agencies modified the platform for liaison, training, and reconnaissance, with examples serving in the inventories of countries including France, Argentina, Australia, and Canada, and often operating alongside rotary-wing types like the Eurocopter Tiger and the Bell AH-1 Cobra in mixed fleets. Law enforcement bodies such as Police Scotland and New South Wales Police Force configured airframes with FLIR systems and radios comparable to suites used by Northrop Grumman and Elbit Systems; diplomatic and VIP transport variants have been used by presidencies in nations like Chile and Bolivia.

Accidents and Incidents

The type has been involved in accidents investigated by authorities including Bureau d'Enquêtes et d'Analyses and National Transportation Safety Board, with incidents prompting airworthiness directives from EASA and FAA and safety recommendations similar to those issued following high-profile rotorcraft mishaps such as the Sikorsky S-92 investigations; investigations have covered factors paralleling inquiries into Helios Airways and Malaysia Airlines incidents, including maintenance, weather, and human factors.

Category:Helicopters