The Eurocopter MH-65 Dolphin is a twin-engined

helicopter A helicopter is a type of rotorcraft in which Lift (force), lift and thrust are supplied by horizontally spinning Helicopter rotor, rotors. This allows the helicopter to VTOL, take off and land vertically, to hover (helicopter), hover, and ...

operated by the

United States Coast Guard The United States Coast Guard (USCG) is the maritime security, search and rescue, and Admiralty law, law enforcement military branch, service branch of the armed forces of the United States. It is one of the country's eight Uniformed services ...

(USCG) for

medevac Medical evacuation, often shortened to medevac or medivac, is the timely and efficient movement and en route care provided by medical personnel to patients requiring evacuation or transport using medically equipped air ambulances, helicopters an ...

-capable

search and rescue Search and rescue (SAR) is the search for and provision of aid to people who are in distress or imminent danger. The general field of search and rescue includes many specialty sub-fields, typically determined by the type of terrain the search ...

(SAR) and armed Airborne Use of Force missions. It is a variant of the French-built

Eurocopter AS365 Dauphin The Eurocopter, later Airbus Helicopters AS365 Dauphin, originally known as the Aérospatiale SA 365 Dauphin 2, is a medium-weight multipurpose twin-engine helicopter produced by Airbus Helicopters. It was originally developed and manufactured ...

Development

The SA366 G1 Dauphin version was selected by the United States Coast Guard in 1979 as its new short range recovery (SRR) air-sea rescue helicopter, replacing the Sikorsky HH-52A Sea Guard. In total 99 helicopters, optimised for the USCG's search and rescue role tasks and given the designation HH-65A Dolphin, were acquired. Unlike the HH-52, the HH-65A is not able to perform water landings.HH-65A Dolphin
, GlobalSecurity.org, accessed 1 October 2007 The HH-65 normally carries a crew of four: Pilot, Copilot, Flight Mechanic and Rescue Swimmer. The Dolphin was manufactured by Aerospatiale Helicopter Corporation (later

Airbus Helicopters Airbus Helicopters SAS (formerly Eurocopter S.A., trading as Eurocopter Group) is the helicopter manufacturing division of Airbus. It is the largest in the industry in terms of revenues and turbine helicopter deliveries, holding 48% of the wo ...

) and assembled in

Grand Prairie, Texas Grand Prairie is a city in the U.S. state of Texas, located in Dallas County, Texas, Dallas, Tarrant County, Texas, Tarrant, and Ellis County, Texas, Ellis counties with a small part extending into Johnson County, Texas , Johnson county. It ...

. Lycoming LTS101-750B-2

turboshaft A turboshaft engine is a form of gas turbine that is optimized to produce shaft horsepower rather than jet thrust. In concept, turboshaft engines are very similar to turbojets, with additional turbine expansion to extract heat energy from the ex ...

engines were selected, while

Rockwell Collins Rockwell Collins, Inc. was a multinational corporation headquartered in Cedar Rapids, Iowa, providing avionics and information technology systems and services to government agencies and aircraft manufacturers. It was formed when the Collins Radi ...

manufactured the HH-65's avionics in

Cedar Rapids, Iowa Cedar Rapids is a city in Linn County, Iowa, United States, and its county seat. The population was 137,710 at the 2020 United States census, 2020 census, making it the List of cities in Iowa, second-most populous city in Iowa. The city lies o ...

. The HH-65 Dolphin is used for homeland security patrols,

cargo In transportation, cargo refers to goods transported by land, water or air, while freight refers to its conveyance. In economics, freight refers to goods transported at a freight rate for commercial gain. The term cargo is also used in cas ...

, drug interdiction, ice breaking, military readiness,

pollution control Pollution is the introduction of contaminants into the natural environment that cause harm. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the component ...

, and

missions. The HH-65 is known for its Fenestron tail rotor and its

autopilot An autopilot is a system used to control the path of a vehicle without requiring constant manual control by a human operator. Autopilots do not replace human operators. Instead, the autopilot assists the operator's control of the vehicle, allow ...

capabilities, which can complete an unaided approach to the water and bring the aircraft into a stable hover, or automatically fly search patterns, an ability which allows the crew to engage in other tasks. In order to comply with U.S. regulations relating to local content (based primarily on the value of individual components of the aircraft), engineering changes were required—notably, the SA365's original Turbomeca Arriel engines were replaced with the LTS101-750B-2, which at the time were required to be American. Unfortunately, initial teething problems with this engine worsened as the HH-65's weight grew, resulting in several in-flight loss-of-power events. The USCG funded a program to improve engine reliability, but the resulting LTS101-850 failed to meet expectations. In 1994, the USCG therefore held a fast-track competition to select a new engine, and in March 2004 the Guard announced the selection of the Turbomeca Arriel 2C2-CG, already installed on the EC155. This upgrade began in 2004, and has resulted in a safer and more capable aircraft. These modified HH-65As and HH-65Bs, which also gained new avionics and other enhancements, have been designated as HH-65Cs.

Design

The HH-65A's minimum equipment requirements exceeded anything previously packaged into a helicopter weighing less than 10,000 pounds (4,535 kg). Seventy-five percent of the HH-65's structure—including rotorhead, rotor blades and fuselage—consists of corrosion-resistant composite materials. Also a unique feature of the Dolphin is its computerized flight management system, which integrates state-of-the-art communications and navigation equipment. This system provides automatic flight control. At the pilot's direction, the system will bring the aircraft to a stable hover above a selected object. This is an important safety feature in darkness or inclement weather. Selected search patterns can be flown automatically, freeing the pilot and copilot to concentrate on sighting & searching the object. A distinctive feature of the MH-65 is its fenestron ducted-fan anti-torque device. The fenestron consists of 11 blades spinning inside a circular housing at the base of the helicopter's tail fin. Certified for single-pilot

instrument flight rules In aviation, instrument flight rules (IFR) is one of two sets of regulations governing all aspects of civil aviation aircraft operations; the other is visual flight rules (VFR). The U.S. Federal Aviation Administration's (FAA) ''Instrument Fl ...

(IFR) operation, the HH-65A was the first helicopter certified with a four-axis autopilot, allowing for hands-off hover over a pre-determined location.

Operational history

The Dolphin is primarily a Short Range Recovery (SRR) aircraft. There are now a total of 102 Dolphins in the United States Coast Guard Fleet. The fleet has home ports in 17 cities on the

Atlantic The Atlantic Ocean is the second largest of the world's five oceanic divisions, with an area of about . It covers approximately 17% of Earth's surface and about 24% of its water surface area. During the Age of Discovery, it was known for se ...

and

Pacific Ocean The Pacific Ocean is the largest and deepest of Earth's five Borders of the oceans, oceanic divisions. It extends from the Arctic Ocean in the north to the Southern Ocean, or, depending on the definition, to Antarctica in the south, and is ...

Gulf of Mexico The Gulf of Mexico () is an oceanic basin and a marginal sea of the Atlantic Ocean, mostly surrounded by the North American continent. It is bounded on the northeast, north, and northwest by the Gulf Coast of the United States; on the southw ...

Hawaii Hawaii ( ; ) is an island U.S. state, state of the United States, in the Pacific Ocean about southwest of the U.S. mainland. One of the two Non-contiguous United States, non-contiguous U.S. states (along with Alaska), it is the only sta ...

, and the

Great Lakes The Great Lakes, also called the Great Lakes of North America, are a series of large interconnected freshwater lakes spanning the Canada–United States border. The five lakes are Lake Superior, Superior, Lake Michigan, Michigan, Lake Huron, H ...

region. The Dolphin is usually deployed from shore but it can be deployed from medium and high endurance Coast Guard Cutters, as well as the Polar Icebreakers. The Dolphin's main jobs are: search and rescue, enforcement of laws and treaties (including drug interdiction), polar ice breaking, marine environmental protection including pollution control, and military readiness. When deployed from an icebreaker, the helicopter acts as the ship's eyes, searching out thinner and more navigable ice channels. They also have the job of airlifting supplies to villages isolated by winter, or transporting scientists to conduct remote research. The MH-65 is also used to patrol the Air Defense Identification Zone (ADIZ) around

Washington, D.C. Washington, D.C., formally the District of Columbia and commonly known as Washington or D.C., is the capital city and federal district of the United States. The city is on the Potomac River, across from Virginia, and shares land borders with ...

, also known as the National Capital Region (NCR). Seven new-build MH-65Cs were acquired for this mission.

Israeli Air Force service

In the early 1980s, the

Israeli Navy The Israeli Navy (, ''Ḥeil HaYam HaYisraeli'', ; ) is the Israel Defense Forces#Arms, naval warfare service arm of the Israel Defense Forces, operating primarily in the Mediterranean Sea theater as well as the Gulf of Eilat and the Red Sea th ...

sought to acquire a purpose-built maritime helicopter to bolster its over-the-horizon detection and targeting capabilities. Several helicopter types were evaluated, including the

Westland Lynx The Westland Lynx is a British multi-purpose twin-engined military helicopter designed and built by Westland Helicopters at its factory in Yeovil. Originally intended as a utility craft for both civil and naval usage, military interest led to t ...

and SH-60 Seahawk; in 1983, Israel announced the selection of the HH-65 Dolphin. Seeking a few examples to gain service experience and with limited funding, Israel acquired two used HH-65A developmental test aircraft from the USCG, the first HH-65A pre-production prototype (c/n 6002) and the third prototype (c/n 6005). These were delivered on 4 August 1985 and although owned by the navy, they were operated by the

Israeli Air Force The Israeli Air Force (IAF; , commonly known as , ''Kheil HaAvir'', "Air Corps") operates as the aerial and space warfare branch of the Israel Defense Forces (IDF). It was founded on May 28, 1948, shortly after the Israeli Declaration of Indep ...

. Initially serving as the maritime flight of 124 Squadron at Palmachim, in June 1987 the IAF formed a dedicated maritime squadron, 193 Squadron, to which the two Dolphins were assigned. On 16 September 1996 one crashed in the Mediterranean, killing the three crew members on board. The remaining helicopter was retired a year later, replaced by the Eurocopter AS565 Panther. The Dolphins were operated by a crew consisting of an IAF Pilot, and IAF mechanic and an IN maritime support officer. First deployed in USCG colors, they were later given a blue and gray color scheme.

Variants

;HH-65A: Initial USCG version, powered by two LTS101-750B-2 turboshaft engines and with an MTOW. ;HH-65B: Avionics upgrade undertaken on a portion of the fleet. Retrofit included an NVG-compatible integrated flight management avionics suite consisting of two GPS-embedded CDU-900G control display units and two MFD-255 multifunction flat panel displays. The HH-65B upgrade was undertaken at the Coast Guard's Aircraft Repair and Supply Center (ARSC) in Elizabeth City, NC, with the first aircraft rolling-off the post-depot maintenance (PDM) line in March 2001. ;HH-65C: HH-65A/B upgraded with new Arriel 2C2-CG engines that provide 40% more power and higher performance, plus an upgraded tail gearbox, long-nose avionics compartment, increased MTOW, expanded lateral flight envelope and Vehicle and Engine Multifunction Display (VEMD) with First Limit Indicator (FLI). First retrofit completed in October 2004. USCG HH-65C

;MH-65C: Initially intended only for use by the Multi-Mission Cutter Helicopter (MCH), a further enhancement of the HH-65C within the USCG's Deepwater effort, includes the installation of a 10-blade low-noise Fenestron, relocated avionics, and an Airborne Use of Force (AUF) package (in common with that of the modernized HH-60T) which provides the capability to fire warning and disabling shots from the air. The MH-65C is used in AUF missions, such as the

Helicopter Interdiction Tactical Squadron The Helicopter Interdiction Tactical Squadron (HITRON) is an Armed helicopter, armed United States Coast Guard helicopter squadron (aviation), squadron specializing in Airborne Use of Force (AUF) and drug-interdiction missions. It is based at Ceci ...

(HITRON) mission taken up by the MH-65C in early 2008. AUF aircraft are armed with the Barrett M107CQ 12.7 mm anti-materiel rifle and M240G 7.62 mm machine gun. The helicopter can also be used for counter terrorism. ;MH-65D: MH-65C with an upgraded flight navigation system common to

Department of Defense The United States Department of Defense (DoD, USDOD, or DOD) is an executive department of the U.S. federal government charged with coordinating and supervising the six U.S. armed services: the Army, Navy, Marines, Air Force, Space Force, ...

helicopters. The first production MH-65D was completed on 20 January 2011 and is fitted with a Honeywell HG7502 radar altimeter, two Honeywell H-764G EGI's (embedded GPS/inertial navigation systems) and two control display units CDU-7000D from Rockwell Collins. 97 HH/MH-65Cs will be upgraded to MH-65D standard. ;MH-65E: The MH-65E incorporates upgrades that will modernize the cockpit by installing digital "glass" cockpit instruments, known as the Common Avionics Architecture System (CAAS) from

Collins Aerospace Collins Aerospace is an American technology company that is one of the world's largest suppliers of aerospace and defense products. It was formed in 2018 from the merger of Rockwell Collins and UTC Aerospace Systems. Headquartered in Charlotte, ...

, similar to those installed in the Coast Guard's upgraded MH-60T Jayhawk Medium Range Recovery (MRR) helicopters. The Echo upgrade replaces the legacy analog automatic flight control with a digital system, and a digital weather radar system. The MH-65E model is expected to begin deliveries to the fleet in 2017.

Operators

Two coast guard HH-65C Dolphin helicopters

;: *

** 124 Squadron (Israel) –

Palmachim Airbase Palmachim Airbase (, ) is an Israeli Air Force, Israeli Air Force (IAF) base and spaceport, which the IAF and the Israel Space Agency, Israel Space Agency (ISA) operate jointly. It is located west of the city of Yavne on the Mediterranean coas ...

(initial assignment) ** 193 Squadron (Israel) – Ramat David Airbase or

;: *

** CGAS Atlantic City ** Coast Guard ATC ** CGAS Barbers Point ** CGAS Corpus Christi ** CGAS Detroit ** CGAS Houston ** CGAS Humboldt Bay ** CGAS Kodiak ** CGAS Miami ** CGAS North Bend ** CGAS Port Angeles ** CGAS San Francisco ** CGAS Savannah **

Specifications (MH-65C)

Eurocopter MH-65 Dolphin orthographical image

References

External links

HH-65 Depot Maintenance page
an
Flight Training page on CoastGuardchannel.com

{{Authority control Aérospatiale aircraft Airbus Helicopters aircraft Fantail helicopters Military helicopters Search and rescue helicopters 1980s United States helicopters Twin-turbine helicopters Aircraft first flown in 1980