The Bell UH-1N Twin Huey is a medium

military helicopter A military helicopter is a helicopter that is either specifically designed for or converted for usage by a military. A military helicopter's mission is a function of its design or conversion. The most common use of military helicopters is airlif ...

designed and produced by the American aerospace manufacturer

Bell Helicopter Bell Textron Inc. is an American aerospace manufacturer headquartered in Fort Worth, Texas. A subsidiary of Textron, Bell manufactures military rotorcraft at facilities in Fort Worth, and Amarillo, Texas, United States as well as commercial heli ...

. It is a member of the extensive

Huey family The Bell Huey family of helicopters includes a wide range of civil and military aircraft produced since 1956 by Bell Helicopter. This H-1 family of aircraft includes the utility UH-1 Iroquois and the derivative AH-1 Cobra attack helicopter serie ...

, the initial version was the CUH-1N Twin Huey (later CH-135 Twin Huey), which was first ordered by the

Canadian Forces The Canadian Armed Forces (CAF; , FAC) are the unified Military, military forces of Canada, including sea, land, and air commands referred to as the Royal Canadian Navy, Canadian Army and the Royal Canadian Air Force. Under the ''National Defenc ...

in 1968. Barely a year following initial discussions, the UH-1N performed its

maiden flight The maiden flight, also known as first flight, of an aircraft is the first occasion on which it leaves the ground under its own power. The same term is also used for the first launch of rockets. In the early days of aviation it could be dange ...

in April 1969. Its procurement by the US military was initially controversial due to the high level of Canadian content, such as its

Pratt & Whitney Canada PT6T The Pratt & Whitney Canada PT6T Twin-Pac is a turboshaft engine designed for helicopters. Manufactured by Pratt & Whitney Canada, its first application was in the Bell 212 and UH-1N Twin Huey helicopter family. The PT6T Twin-Pac consists of two ...

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. However, the acquisition was approved and the Twin Huey was quickly delivered to the

United States Air Force The United States Air Force (USAF) is the Air force, air service branch of the United States Department of Defense. It is one of the six United States Armed Forces and one of the eight uniformed services of the United States. Tracing its ori ...

and being sent to front line combat units in

Vietnam Vietnam, officially the Socialist Republic of Vietnam (SRV), is a country at the eastern edge of mainland Southeast Asia, with an area of about and a population of over 100 million, making it the world's List of countries and depende ...

in October 1970. The following year, the Canadian Forces,

United States Marine Corps The United States Marine Corps (USMC), also referred to as the United States Marines or simply the Marines, is the maritime land force service branch of the United States Department of Defense. It is responsible for conducting expeditionar ...

, and the

United States Navy The United States Navy (USN) is the naval warfare, maritime military branch, service branch of the United States Department of Defense. It is the world's most powerful navy with the largest Displacement (ship), displacement, at 4.5 millio ...

all received their first examples; Bell was also quick to adapt the Twin Huey into a civilian helicopter, the

Bell 212 The Bell 212 (also known as the ''Bell Two-Twelve'') is a two-blade, twin-engine, medium helicopter that first flew in 1968. Originally manufactured by Bell Helicopter in Fort Worth, Texas, United States, production was moved to Mirabel, Queb ...

, as well as the later

Bell 412 The Bell 412 is a utility helicopter of the Huey family manufactured by Bell Helicopter. It is a development of the Bell 212, with the major difference being the composite four-blade main rotor. It is a twin-turbine helicopter that has been ...

. The Twin Huey would see service in numerous conflicts, the first being the

Vietnam War The Vietnam War (1 November 1955 – 30 April 1975) was an armed conflict in Vietnam, Laos, and Cambodia fought between North Vietnam (Democratic Republic of Vietnam) and South Vietnam (Republic of Vietnam) and their allies. North Vietnam w ...

, where they were commonly used to support

Special Forces Special forces or special operations forces (SOF) are military units trained to conduct special operations. NATO has defined special operations as "military activities conducted by specially designated, organized, selected, trained and equip ...

reconnaissance missions. On the home front, they were used as the main utility helicopter at various

ICBM An intercontinental ballistic missile (ICBM) is a ballistic missile with a range (aeronautics), range greater than , primarily designed for nuclear weapons delivery (delivering one or more Thermonuclear weapon, thermonuclear warheads). Conven ...

launch sites, as well as operating as executive transports for carrying the US president and other high-ranking officials by

Marine Helicopter Squadron One Marine is an adjective meaning of or pertaining to the sea or ocean. Marine or marines may refer to: Ocean * Maritime (disambiguation) * Marine art * Marine biology * Marine current power * Marine debris * Marine energy * Marine habitats * Mari ...

. USMC UH-1Ns were active during the 2003 invasion of Iraq, providing reconnaissance, communications, and

close air support Close air support (CAS) is defined as aerial warfare actions—often air-to-ground actions such as strafes or airstrikes—by military aircraft against hostile targets in close proximity to friendly forces. A form of fire support, CAS requires ...

to ground forces. Overseas, UH-1Ns participated in the

Colombian armed conflict The Colombian conflict () began on May 27, 1964, and is a low-intensity asymmetric war between the government of Colombia, far-right paramilitary groups, crime syndicates and far-left guerrilla groups fighting each other to increase their i ...

and the

Falklands War The Falklands War () was a ten-week undeclared war between Argentina and the United Kingdom in 1982 over two British Overseas Territories, British dependent territories in the South Atlantic: the Falkland Islands and Falkland Islands Dependenci ...

. In the 2010s and 2020s, multiple operators were in the process of replacing the Twin Huey with newer helicopters, such as the

Bell UH-1Y Venom The Bell UH-1Y Venom (also called Super Huey) is a twin-engine, 4-blade, medium-sized utility helicopter built by Bell Helicopter under the H-1 upgrade program of the United States Marine Corps. One of the latest members of the numerous Bell H ...

(a development of the UH-1N) and the

AgustaWestland AW139 The AgustaWestland AW139, now known as the Leonardo AW139, is a 15-seat medium-sized twin-engined helicopter developed and produced by the Italian helicopter manufacturer AgustaWestland, now part of Leonardo. It is marketed at several differ ...

Development

The UH-1N was originally developed out of negotiations between the

(CF) and

on the topic of a new utility helicopter during 1968. Specifically, the CF wanted it to be based on the stretched-fuselage

Bell 205 The Bell 204 and 205 are the civilian versions of the UH-1 Iroquois single-engine military helicopter of the Huey family of helicopters. They are type-certificated in the transport category and are used in a wide variety of applications, i ...

, which the service already had experience of, but instead powered by a pair of engines for a higher level of safety. Furthermore, the selection of this engine, the

engine, was reportedly due to political factors. Its initial designation was ''CUH-1N Twin Huey''; later, the CF adopted a new designation system under which the rotorcraft was redesignated ''CH-135 Twin Huey''. The CF approved the development of the rotorcraft on 1 May 1968,Mutza 1986, pp. 31-33. a total of 50 CH-135s were procured, the deliveries of which commenced during May 1971.Drendel 1983, pp. 14-17. CH-135139TwinHuey01A

The US military quickly took an interest in the UH-1N and some officials were keen to quickly procure the type, yet the procurement came close to not happening. It was opposed by the chairman of the

House Armed Services Committee The U.S. House Committee on Armed Services, commonly known as the House Armed Services Committee or HASC, is a standing committee of the United States House of Representatives. It is responsible for funding and oversight of the Department of ...

at the time, L. Mendel Rivers, who disliked that the UH-1N's Pratt & Whitney Canada PT6T engines were produced in Canada. The

Liberal Liberal or liberalism may refer to: Politics * Generally, a supporter of the political philosophy liberalism. Liberals may be politically left or right but tend to be centrist. * An adherent of a Liberal Party (See also Liberal parties by country ...

Canadian government of the time had not supported US involvement in Vietnam and had also opposed US policies in

Southeast Asia Southeast Asia is the geographical United Nations geoscheme for Asia#South-eastern Asia, southeastern region of Asia, consisting of the regions that are situated south of China, east of the Indian subcontinent, and northwest of the Mainland Au ...

, as well as accepting US

draft dodger Conscription evasion or draft evasion (American English) is any successful attempt to elude a government-imposed obligation to serve in the military forces of one's nation. Sometimes draft evasion involves refusing to comply with the military dr ...

s. Rivers was also concerned that procuring the engines would result in a

trade deficit Balance of trade is the difference between the monetary value of a nation's exports and imports of goods over a certain time period. Sometimes, trade in services is also included in the balance of trade but the official IMF definition only consi ...

situation with Canada.

Congress A congress is a formal meeting of the representatives of different countries, constituent states, organizations, trade unions, political parties, or other groups. The term originated in Late Middle English to denote an encounter (meeting of ...

only approved the Twin Huey purchase when it was assured that a US source would be found for the PT6T/T400 engines. Despite these concerns, the sale was permitted and the United States military services ordered 294 Bell 212s under the designation ''UH-1N'', with deliveries commencing in 1970. Having secured multiple military customers, Bell Helicopters became interested in developing a commercial utility model for the civilian market; during 1971,

type certification A type certificate signifies the airworthiness of a particular category of aircraft, according to its manufacturing design (''type design''). Certification confirms that the aircraft of a new type intended for serial production is in compliance w ...

was given to the

by the

Federal Aviation Administration The Federal Aviation Administration (FAA) is a Federal government of the United States, U.S. federal government agency within the United States Department of Transportation, U.S. Department of Transportation that regulates civil aviation in t ...

(FAA). Later on, homologation was obtained for

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) operations, for which appropriate avionics were fitted. During 1977, the company certified the Bell 212 for single-pilot IFR operations, making it the first helicopter in the world to obtain such certification. Another key opportunity was the European market; Bell negotiated with the Italian helicopter manufacturer

Agusta Agusta was an Italian helicopter manufacturer. It was based in Samarate, Northern Italy. The company was founded by Count Giovanni Agusta in 1923, who flew his first aeroplane in 1907. The MV Agusta motorcycle manufacturer began as an offshoot ...

to produce the ''AB-212'' under license. This model, the first examples of which was delivered in 1971, was broadly the same as their American-built counterparts, and were produced for both civilian and military operators. During 1976, the ''AB-212ASW'', an

anti-submarine warfare Anti-submarine warfare (ASW, or in the older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations ar ...

-orientated model, commenced production. The

is a further development of the Bell 212, the major difference being the composite four-blade main rotor. The UH-1N has also been developed into the upgraded, four-blade

UH-1Y The Bell UH-1Y Venom (also called Super Huey) is a twin-engine, 4-blade, medium-sized utility helicopter built by Bell Helicopter under the H-1 upgrade program of the United States Marine Corps. One of the latest members of the numerous Huey f ...

, which was developed to replace the UH-1N in USMC service.

Design

The Bell UH-1N Twin Huey is a twin-engined medium-sized

primarily operated as a utility transport. Power is provided by a PT6T-3/T400 Turbo Twin Pac, comprising a pair of

Pratt & Whitney Canada PT6 The Pratt & Whitney Canada PT6 is a turboprop aircraft engine produced by Pratt & Whitney Canada. Its design was started in 1958, it first ran in February 1960, first flew on 30 May 1961, entered service in 1964, and has been continuously upd ...

engines mounted side by side and driving a shared

gearbox A transmission (also called a gearbox) is a mechanical device invented by Louis Renault (who founded Renault) which uses a gear set—two or more gears working together—to change the speed, direction of rotation, or torque multiplication/r ...

and single output shaft. These engines are capable of producing up to 1,342 kW (1,800 shp). In the event of a single power section failing, the remaining section can deliver 671 kW (900 shp) for up to 30 minutes or 571 kW (765 shp) continuously, enabling the UH-1N to maintain cruise performance at maximum weight. It is capable of flight under instrument flight rules and in nighttime conditions. The UH-1N is often flown with a four-person crew, comprising two pilots and two crew chiefs; while in the air, these crew chiefs man the weapons, while one pilot functions as a navigator and the other actively flies. The interior is normally outfitted with a 15-seat configuration, in which it can be flown by a single pilot and carry up to 14 passengers; in practice, rarely could the UH-1N actually carry this many unless also carrying limited fuel and equipment due to weight limitations and weather conditions. When configured to carry cargo, the cabin has an internal capacity of 220 ft³ (6.23 m³). Up to six litters can be carried in a medical evacuation arrangement. An external load of up to 5,000 lb (2,268 kg) can also be carried. In

(USMC) service, up to three radios would be installed in the cabin so that commanders could remain airborne while coordinating ground troops. The UH-1N was normally armed with a single .50 caliber machine gun on the helicopter's left side, while a 7.62 millimeter machine gun is mounted on the right side. To improve safety, a high level of redundancy is present across the UH-1N's key systems; these include duplicate

hydraulic Hydraulics () is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counterpart of pneumatics, which concer ...

, electrical, and fuel systems. Fire suppression systems were also installed. The USMC opted to modify a large number of their UH-1Ns with a stability control augmentation system, which provides servo inputs to the rotor head to help stabilize the aircraft during flight. This modification removed the gyroscopic "stabilization bar" on top of the main rotor head, instead relying on the computer system for stability.

Operational history

UH-1N VXE-6 at Marble Point Antarctica 1988

050908-F-0000S-006 AFSPC UH-1N deployment aids Hurricane Katrina relief efforts

Starting in late 1970, mere months after receiving its first deliveries of the type, the USAF begun to re-equip the

20th Special Operations Squadron The 20th Special Operations Squadron is part of the 27th Special Operations Wing at Cannon Air Force Base, New Mexico. It operates Bell Boeing CV-22 Ospreys on special operations missions. It traces its history back to the activation of the 20th ...

with UH-1Ns, supplementing and eventually replacing the single-engined UH-1F and UH-1P. Armed with

minigun The M134 Minigun is an American 7.62×51mm NATO six-barrel rotary machine gun with a high rate of fire (2,000 to 6,000 rounds per minute). It features a Gatling-style rotating barrel assembly with an external power source, normally an elect ...

s (or 40 mm grenade launchers) and rocket pods, and painted camouflage with no US markings and only a Green Hornet insignia, the UH-1N supported

reconnaissance missions from

Cam Ranh Bay Cam Ranh Bay () is a deep-water bay in Vietnam in Khánh Hòa Province. It is located at an inlet of the South China Sea situated on the southeastern coast of Vietnam, between Phan Rang and Nha Trang, approximately 290 kilometers (180 miles) nor ...

.Mutza ''Air Enthusiast'' December 1986–April 1987, pp. 30–31. The first deliveries of the UH-1N to the U.S. Navy and USMC took place in 1971. In total, 205 UH-1Ns would be received, not including six VH-1N executive transports that were used to carry the US president and other high-ranking officials, operated by

. Unlike in the CF, in US service, the UH-1N retained the official name "Iroquois" from the single–engined

UH-1 The Bell UH-1 Iroquois (nicknamed "Huey") is a utility military helicopter designed and produced by the American aerospace company Bell Helicopter. It is the first member of the prolific Bell Huey family, Huey family, as well as the first turb ...

variants, although US service personnel refer to the aircraft as a "Huey" or "Twin Huey". In Canadian service, the CH-135 Twin Huey was regularly used as a tactical transport, moving troops and equipment around the forward areas of a combat zone;

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 ...

flights were also conducted. Further activities included VIP transport, search and rescue, and drug interdiction missions. CH-135s were deployed on multiple occasions to support

United Nations The United Nations (UN) is the Earth, global intergovernmental organization established by the signing of the Charter of the United Nations, UN Charter on 26 June 1945 with the stated purpose of maintaining international peace and internationa ...

peacekeeping Peacekeeping comprises activities, especially military ones, intended to create conditions that favor lasting peace. Research generally finds that peacekeeping reduces civilian and battlefield deaths, as well as reduces the risk of renewed w ...

missions in various regions, including

Central America Central America is a subregion of North America. Its political boundaries are defined as bordering Mexico to the north, Colombia to the southeast, the Caribbean to the east, and the Pacific Ocean to the southwest. Central America is usually ...

Somalia Somalia, officially the Federal Republic of Somalia, is the easternmost country in continental Africa. The country is located in the Horn of Africa and is bordered by Ethiopia to the west, Djibouti to the northwest, Kenya to the southwest, th ...

, and

Haiti Haiti, officially the Republic of Haiti, is a country on the island of Hispaniola in the Caribbean Sea, east of Cuba and Jamaica, and south of the Bahamas. It occupies the western three-eighths of the island, which it shares with the Dominican ...

. The

Argentine Air Force The Argentine Air Force (, or simply ''FAA'') is the air force of Argentina and one of three branches of the Armed Forces of the Argentine Republic. In 2018, it had 13,837 military and 6,900 civilian personnel. FAA commander in chief is Brigadie ...

acquired eight Bell 212s during 1978. During the 1982

, Argentina deployed a pair of Bell 212s to the airstrip at

Goose Green Goose Green, also known simply as Goose, is a hamlet in Lafonia on East Falkland in the Falkland Islands. It lies on Choiseul Sound, on the east side of the island's central isthmus, south-southwest of Darwin. With a population of about 4 ...

where they performed general support duties, including the recovery of numerous downed pilots. By the end of the hostilities, both aircraft were still intact and flightworthy, but were captured and dismantled by the British troops. USMC UH-1Ns were deployed during the 2003 invasion of Iraq; they were typically used to provide reconnaissance and communications support to ground troops. Multiple UH-1Ns were called upon to provide close air support during heavy fighting in the

Battle of Nasiriyah The Battle of Nasiriyah was fought between the US 2nd Marine Expeditionary Brigade and Iraqi forces from 23 March to 2 April 2003 during the US-led invasion of Iraq. On the night of 24–25 March, the bulk of the Marines of Regimental Comb ...

. In comparison with the

Bell AH-1 Cobra The Bell AH-1 Cobra is a single-engined attack helicopter developed and manufactured by the American rotorcraft manufacturer Bell Helicopter. A member of the prolific Huey family, the AH-1 is also referred to as the HueyCobra or Snake. The ...

attack helicopter, the UH-1N had a wider field of fire with its weapons and thus played a useful role in close combat situations, commonly working in conjunction with Cobras. The USAF employs the aging UH-1Ns to fulfill its

mission, providing a utility helicopter for transport between bases such as

Minot AFB Minot Air Force Base ( ; ) is a United States Air Force (USAF) installation in Ward County, North Dakota, north of the city of Minot via U.S. Route 83. In the 2020 census, the base was counted as a CDP with a total population of 5 ...

, Francis E. Warren AFB and

Malmstrom AFB Malmstrom Air Force Base is a United States Air Force base in Cascade County, Montana, United States, adjacent to the city of Great Falls. It was named in honor of World War II POW Colonel Einar Axel Malmstrom. It is the home of the 341st Mi ...

to missile launch sites in North Dakota, Montana, Wyoming, Nebraska, and Colorado. The UH-1N is also used by the

36th Rescue Squadron The 36th Rescue Squadron at Fairchild Air Force Base, Washington is part of the 58th Operations Group. It was formerly part of the 336th Training Group at Fairchild. It operates Bell UH-1N Twin Huey aircraft conducting search and rescue missions ...

(36 RQS) at

Fairchild AFB Fairchild Air Force Base (AFB) is a United States Air Force base, located in the northwest United States in eastern Washington, approximately southwest of Spokane. The host unit at Fairchild is the 92nd Air Refueling Wing (92 ARW) assigne ...

, Washington, for conducting search-and-rescue and medical evacuation missions, as well as the

459th Airlift Squadron The 459th Airlift Squadron is an active United States Air Force unit assigned to the 374th Airlift Wing at Yokota Air Base, Japan. It has been stationed at Yokota since 1993. It has performed its current mission since activating in 1975 as t ...

based at

Yokota Air Base , is a Japan Air Self-Defense Force (JASDF) and United States Air Force (USAF) base in the Tama Area, or Western Tokyo. It occupies portions of Akishima, Fussa, Hamura, Mizuho, Musashimurayama, and Tachikawa. The base houses 14,000 pers ...

in Japan. In August 2013, the USAF said they were close to finalizing a plan to sustain and modernize their UH-1Ns for the next six to ten years. It was intended to address flight and safety mandates, investigate modest improvements in capabilities, and reduce capability gaps. While the UH-1N had become one of the oldest platforms operated by the service, retaining it was viewed as having "minimal risk". Fleet-wide upgrades included night vision-compatible cockpit lighting, crash-worthy seats for flight engineers, and installation of a terrain-awareness warning system and traffic collision-avoidance device. The USAF was also in the process of acquiring ex-USMC UH-1Ns, possibly involving as many as 26 helicopters to either add them to USAF's active fleet or keep them in reserve. The UH-1N saw combat service in the

. On 16 October 2013, a UH-1N crashed in the northern

La Guajira La Guajira () is a departments of Colombia, department of Colombia. It occupies most of the Guajira Peninsula in the northeast region of the country, on the Caribbean Sea and bordering Venezuela, at the northernmost tip of South America. The ca ...

department in a

FARC The Revolutionary Armed Forces of Colombia – People's Army (, FARC–EP or FARC) was a Marxist–Leninist guerrilla group involved in the continuing Colombian conflict starting in 1964. The FARC-EP was officially founded in 1966 from peasan ...

-dominated area. The USMC planned to retire the UH-1N by September 2014 after 43 years of service. Marine Light Attack Helicopter Squadron 773 was the last Marine squadron operating the type, their last deployment occurring in 2013, when two helicopters sailed on a

Royal Netherlands Navy The Royal Netherlands Navy (, ) is the Navy, maritime service branch of the Netherlands Armed Forces. It traces its history to 8 January 1488, making it the List of navies, third-oldest navy in the world. During the 17th and early 18th centurie ...

ship for an African Partnership Station deployment. The UH-1N was replaced by the upgraded UH-1Y Venom; ten are remanufactured UH-1N airframes, after which the USMC decided to procure newly built airframes instead. By 2014, five unarmed HH-1Ns remained in use by the USMC until these were also replaced by UH-1Ys and retired in 2015, the only HH-1Ns remaining from 44 that were converted from 38 UH-1Ns and the six VH-1Ns. The final combat deployment of USMC UH-1Ns was to Afghanistan in 2010. The service retired the UH-1N during a "sundown ceremony" at

Naval Air Station Joint Reserve Base New Orleans Naval Air Station Joint Reserve Base New Orleans is a base of the United States military located in Belle Chasse, unincorporated Plaquemines Parish, Louisiana, United States. NAS JRB New Orleans is home to a Navy Reserve aggressor squadron a ...

on 28 August 2014. By March 2013, the USAF operated 62 UH-1N Twin Hueys, with 25 providing security at

sites, 19 stationed at

Joint Base Andrews Joint Base Andrews (JBA) is a United States military facility located in Prince George's County, Maryland. The facility is under the jurisdiction of the United States Air Force (USAF) 316th Wing, Air Force District of Washington (AFDW). The bas ...

to evacuate Washington-based government officials in emergencies, and 18 used for testing and training. Since most were purchased in 1969, the USAF had sought a replacement. The first requirements were issued in 2007, but the process was repeatedly delayed. On 24 September 2018, the USAF declared a

Boeing The Boeing Company, or simply Boeing (), is an American multinational corporation that designs, manufactures, and sells airplanes, rotorcraft, rockets, satellites, and missiles worldwide. The company also provides leasing and product support s ...

/ Leonardo submission of their MH-139 variant of the

the winner, beating out the

Sikorsky Sikorsky or Sikorski may refer to: * Sikorsky (comics), a Marvel Comics character * Sikorsky (crater), a lunar crater * Sikorsky Aircraft, an American aircraft manufacturer People with the surname * Brian Sikorski (born 1974), Major League Basebal ...

Lockheed Martin The Lockheed Martin Corporation is an American Arms industry, defense and aerospace manufacturer with worldwide interests. It was formed by the merger of Lockheed Corporation with Martin Marietta on March 15, 1995. It is headquartered in North ...

HH-60U Black Hawk and the

Sierra Nevada Corporation Sierra Nevada Corporation (also styled SNC) is an American aerospace, defense, electronics, engineering and manufacturing corporation that specializes in aircraft modification, integration and other space technologies. The corporation contracts ...

upgraded UH-60L Force Hawk. Boeing was awarded an initial $375 million contract for four MH-139s, with 84 helicopters planned at a total $2.38 billion program cost. Initial deliveries were planned for 2021.

Variants

Canadian variants

;CUH-1N Twin Huey :Original Canadian Armed Forces designation for the UH-1N utility transport helicopter. ; :

Canadian Canadians () are people identified with the country of Canada. This connection may be residential, legal, historical or cultural. For most Canadians, many (or all) of these connections exist and are collectively the source of their being ''C ...

version of the UH-1N. Canada purchased 50 CH-135s with deliveries starting in 1971. The aircraft were retired from the Canadian Forces starting in 1996 and struck off strength in December 1999. 41 of the surviving CH-135s were acquired by the US government in December 1999 and transferred to the

National Army of Colombia The National Army of Colombia () is the land warfare service branch of the Military Forces of Colombia. With over 361,420 active personnel as of 2020, it is the largest and oldest service branch in Colombia, and is the second largest army in the ...

and

Colombian National Police The National Police of Colombia () is the national police force of the Republic of Colombia. Although the National Police is not part of the Military Forces of Colombia (Army, Navy, and Aerospace Force), it constitutes along with them the " ...

. At least one CH-135 was destroyed in combat. 135135 was transferred to the Colombian National Police and flown by the Dirección Antinarcóticos (DIRAN). It was destroyed on the ground by

rebels on 18 January 2002, following an incident in which it was forced down by gunfire. Two CH-135s are on display in museums, one at the

Canada Aviation Museum The Canada Aviation and Space Museum () (formerly the Canada Aviation Museum (''Musée de l'aviation du Canada'') and National Aeronautical Collection (''Collection aéronautique nationale'')) is Canada's national aviation history museum. The m ...

Ottawa Ottawa is the capital city of Canada. It is located in the southern Ontario, southern portion of the province of Ontario, at the confluence of the Ottawa River and the Rideau River. Ottawa borders Gatineau, Gatineau, Quebec, and forms the cor ...

and one at the

National Air Force Museum of Canada The National Air Force Museum of Canada is an aviation museum dedicated to preserving the history of the Royal Canadian Air Force (RCAF) and is located on the west side of CFB Trenton in Trenton, Ontario. The museum is a permanent archive which c ...

CFB Trenton Canadian Forces Base Trenton (also CFB Trenton), formerly RCAF Station Trenton, is a Canadian Forces base located within the city of Quinte West, Ontario. It is operated as an air force base by the Royal Canadian Air Force (RCAF) and is the hub ...

U.S. variants

;UH-1N Iroquois :Initial production model, used by the USAF, USN, and USMC. Over the years, the primary operators, the USMC has developed a number of upgrades for the aircraft including improved avionics, defenses, and a

FLIR Forward-looking infrared (FLIR) cameras, typically used on military and civilian aircraft, use a thermographic camera that senses infrared radiation. The sensors installed in forward-looking infrared cameras, as well as those of other thermal ...

turret. The USAF planned to replace their UH-1Ns with the Common Vertical Lift Support Platform to support the service's ICBM activities, but also examined a life extension for their current fleet. ;VH-1N :VIP transport configuration ;HH-1N :SAR variant. ;

UH-1Y Venom The Bell UH-1Y Venom (also called Super Huey) is a twin-engine, 4-blade, medium-sized utility helicopter built by Bell Helicopter under the H-1 upgrade program of the United States Marine Corps. One of the latest members of the numerous Huey ...

:A UH-1N replacement and upgrade as part of the

H-1 upgrade program The H-1 upgrade program is the United States Marine Corps's program to develop the AH-1Z Viper and UH-1Y Venom military helicopters to replace its aging fleets of AH-1W SuperCobras and UH-1N Twin Hueys. The contract was awarded in 1996 to Bell Hel ...

for the USMC, designed to coincide with a similar upgrade for the

AH-1W The Bell AH-1 SuperCobra is a twin-engined attack helicopter that was developed on behalf of, and primarily operated by, the United States Marine Corps (USMC). The twin Cobra family, itself part of the larger Huey family, includes the AH-1J ...

attack helicopter to AH-1Z Viper standard, with common engines and other major systems.

Thai variants

;H.6A :()

Royal Thai Armed Forces The Royal Thai Armed Forces (RTARF; ; ) are the armed forces of the Kingdom of Thailand. The Highest Commander of the Royal Thai Armed Forces (จอมทัพไทย; ) is the King of Thailand. The armed forces are managed by the Minist ...

designation for the UH-1N.

Italian-built variants

;Agusta-Bell AB 212 :Civil or military utility transport version. Built under license in

Italy Italy, officially the Italian Republic, is a country in Southern Europe, Southern and Western Europe, Western Europe. It consists of Italian Peninsula, a peninsula that extends into the Mediterranean Sea, with the Alps on its northern land b ...

. ;Agusta-Bell AB 212EW :Electronic warfare version for

Turkey Turkey, officially the Republic of Türkiye, is a country mainly located in Anatolia in West Asia, with a relatively small part called East Thrace in Southeast Europe. It borders the Black Sea to the north; Georgia (country), Georgia, Armen ...

. ;Agusta-Bell AB 212ASW :

Anti-submarine warfare Anti-submarine warfare (ASW, or in the older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations ar ...

, anti-shipping version of the AB 212 helicopter, built under license in

. Operated by the

Italian Navy The Italian Navy (; abbreviated as MM) is one of the four branches of Italian Armed Forces and was formed in 1946 from what remained of the ''Regia Marina'' (Royal Navy) after World War II. , the Italian Navy had a strength of 30,923 active per ...

Hellenic Navy The Hellenic Navy (HN; , abbreviated ΠΝ) is the Navy, naval force of Greece, part of the Hellenic Armed Forces. The modern Greek navy historically hails from the naval forces of various Aegean Islands, which fought in the Greek War of Independ ...

and

Islamic Republic of Iran Navy The Islamic Republic of Iran Navy (IRIN; ), also referred as the Iranian Navy (abbreviated NEDAJA; ), is the naval warfare service branch of Iran's regular military, the Islamic Republic of Iran Army, Islamic Republic of Iran Army (''Artesh''). I ...

, Peru, Spain, Turkey, and Venezuela. :The AB 212ASW is a Model 212 Twin Huey with a prominent radome above the cockpit. Early production had a dome-shaped radome, while later production had a flatter "drum" radome. A left side winch is used for dipping the Bendix ASQ-18 sonar. Other changes include structural reinforcement for a gross weight of 11,197 lbs (5080 kg),

ECM ECM may refer to the following: Economics and commerce * Engineering change management * Equity capital markets * Error correction model, an econometric model * European Common Market Mathematics * Lenstra's Elliptic curve method for factor ...

, shipboard deck tie-down attachments and corrosion protection. Armament is two Mk 44 or Mk 46 torpedoes or two depth charges in the ASW role and four AS.12 air-to-surface wire-guided missiles for the anti-shipping role.Green 1980, p. 229.Wood 1985, p. 490.

Operators

; *

National Air Force of Angola The National Air Force of Angola (FANA; ) is the air force branch of the Angolan Armed Forces. With an inventory of more than 300 aircraft, FANA is (on paper) one of the largest and strongest air forces of Africa. History Angola became indepe ...

; *

** 7th Air Brigade - 1st Search and Rescue Squadron ; *

Austrian Air Force The Austrian Air Force () is a component part of the Austrian Armed Forces. Aircraft Current inventory History The Austrian Air Force in its current form was created in May 1955 by the victorious Allies of World War II, Allied powers ...

; *

Royal Bahraini Air Force The Royal Bahraini Air Force (, abbreviated as RBAF, formerly known as Bahrain Amiri Air Force) is the aerial warfare branch of the Bahrain Defence Force (BDF). Originally formed as the BDF Air Wing in 1976, it became an independent service bran ...

; *

Bangladesh Air Force The Bangladesh Air Force (BAF) () is the aerial warfare branch of the Bangladesh Armed Forces. The air force is primarily responsible for air defence of Bangladesh's sovereign territory as well as providing air support to the Bangladesh Army a ...

**9th Squadron "Scorpions" ; *

Colombian Aerospace Force The Colombian Aerospace Force (FAC, ) is the air force of the Republic of Colombia. The Colombian Aerospace Force is one of the three institutions of the Military Forces of Colombia charged, according to the 1991 Constitution, with working to exe ...

Colombian Army The National Army of Colombia () is the land warfare service branch of the Military Forces of Colombia. With over 361,420 active personnel as of 2020, it is the largest and oldest service branch in Colombia, and is the second largest army in the ...

Colombian Navy The Colombian Navy, officially the Colombian National Navy (), also known as the ''"Armada Nacional"'' or just the ''"Armada"'' in Spanish, is the naval branch of the Military Forces of Colombia, military forces of Colombia. The Navy is responsi ...

MIAS 260915 Aeronautica Militare AB212 05

; *

Guatemalan Air Force The Guatemalan Air Force ( []) is the aerial warfare service branch of the Armed Forces of Guatemala. The FAG is a subordinate to the Military of Guatemala, Guatemalan Military and its commanding officer reports to the Defence Minister. Mission ...

; *

Islamic Republic of Iran Air Force The Islamic Republic of Iran Air Force (IRIAF; ) is the air force, aviation branch of the Islamic Republic of Iran Army. The present air force was created when the Imperial Iranian Air Force was renamed in 1979 following the Iranian Revoluti ...

; *

Italian Air Force The Italian Air Force (; AM, ) is the air force of the Italy, Italian Republic. The Italian Air Force was founded as an independent service arm on 28 March 1923 by Victor Emmanuel III of Italy, King Victor Emmanuel III as the ("Royal Air Force ...

operates 36 aircraft *

; *

Lebanese Air Force The Lebanese Air Force (LAF) () is the aerial warfare branch of the Lebanese Armed Forces. The seal of the air force is a roundel with two wings and a Lebanese Cedar tree, surrounded by two laurel leaves on a blue background. History The Le ...

7 aircraft * ; *

Mexican Air Force The Mexican Air Force (FAM; ) is the air service branch of the Mexican Armed Forces. It is a component of the Mexican Army and as such overseen by the National Defense Secretariat (SEDENA). The objective of the FAM is to defend the integrity, in ...

; *

Royal Moroccan Air Force The Royal Moroccan Air Force (; ; ) is the air force of the Moroccan Armed Forces. History The Moroccan air force was formed on 14 May 1956 as the Sherifian Royal Aviation (). Its modern installations and bases were inherited from France (Bass ...

; *

National Aeronaval Service The National Aeronaval Service of Panama, also called SENAN (abbreviation for ), is a branch of the Panamanian Public Forces which is responsible for carrying out naval and air operations. Its role is to perform protection, surveillance, securit ...

; *

Peruvian Air Force The Peruvian Air Force (, FAP) is the branch of the Peruvian Military of Peru, Armed Forces tasked with defending the nation and its interests through the use of aerial warfare, air power. Additional missions include assistance in safeguarding i ...

Peruvian Navy The Peruvian Navy (, abbreviated MGP) is the branch of the Peruvian Military of Peru, Armed Forces tasked with surveillance, patrol and defense on lakes, rivers and the Pacific Ocean up to from the Peruvian littoral. Additional missions include ...

; *

Royal Saudi Air Force The Royal Saudi Air Force (RSAF; ) is the military aviation, aviation branch of the Armed Forces of Saudi Arabia, Saudi Arabian Armed Forces. The Royal Saudi Air Force currently has wings, squadrons, and a special forces unit dedicated to comba ...

; *

Spanish Army The Spanish Army () is the terrestrial army of the Spanish Armed Forces responsible for land-based military operations. It is one of the oldest Standing army, active armies – dating back to the late 15th century. The Spanish Army has existed ...

Spanish Navy The Spanish Navy, officially the Armada, is the Navy, maritime branch of the Spanish Armed Forces and one of the oldest active naval forces in the world. The Spanish Navy was responsible for a number of major historic achievements in navigation ...

; *

Sri Lanka Air Force The Sri Lanka Air Force (SLAF; ; ) is the air force, air arm and the youngest of the Sri Lanka Armed Forces. It was founded in 1951 as the Royal Ceylon Air Force (RCyAF) with the assistance of the Royal Air Force (RAF). The SLAF played a major r ...

; *

Sudan Air Force The Sudanese Air Force () is the aerial warfare branch of the Sudanese Armed Forces. It was established in 1956 following Sudan's independence earlier that year, and first saw action in the First Sudanese Civil War. History The Sudanese Air For ...

; *

Royal Thai Army The Royal Thai Army or RTA (; ) is the army of Thailand and the oldest and largest branch of the Royal Thai Armed Forces. History Origin The Royal Thai Army is responsible for protecting the kingdom's sovereignty. The army was formed in 187 ...

Royal Thai Navy The Royal Thai Navy (Abbreviation, Abrv: RTN, ทร.; , ) is the Navy, naval warfare force of Thailand. Established in 1906, it was modernised by the Admiral Prince Abhakara Kiartiwongse (1880–1923) who is known as the father of the Royal N ...

; *

Tunisian Air Force The Tunisian Air Force (, ) is one of the branches of the Tunisian Armed Forces. History The Tunisian Air Force was established in 1959, three years after Tunisia regained its independence from France. It took deliveries of its first aircraft ...

UH-1N Huey takes off Minot Air Force Base 050902-F-9208L-084

; *

Turkish Navy The Turkish Naval Forces (), or Turkish Navy (), is the naval warfare service branch of the TAF. The modern naval traditions and customs of the Turkish Navy can be traced back to 10 July 1920, when it was established as the ''Directorate o ...

; *

Uruguayan Air Force The Uruguayan Air Force (, abbreviated FAU) is the air service branch of the Armed Forces of Uruguay. Originally created as part of the National Army of Uruguay, the Air Force was established as a separate branch on December 4, 1953. It is the ...

; *

Venezuelan Navy The Bolivarian Navy of Venezuela (), commonly known as the Venezuelan Navy, is the navy, naval branch of the National Bolivarian Armed Forces of Venezuela. The Venezuelan Navy serves the purpose of defending the naval sovereignty of Venezuela, i ...

; *

Yemeni Air Force The Yemeni Air Force (YAF; ) is the air force branch of the Yemeni Armed Forces. It inherited its aircraft from the former states of North and South Yemen who were supported by the United States and the Soviet Union during the Cold War, respe ...

; *

Zambian Air Force The Zambia Air Force (ZAF) is the air force of Zambia and the air operations element of the Zambian Defence Force. Following the creation of the Republic of Zambia in 1964, the former Northern Rhodesia Air Force was renamed as the Zambia Air For ...

Former operators

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Royal Brunei Air Force The Royal Brunei Air Force (RBAirF), natively known as the (TUDB), is the air force of the sultanate of Brunei. It is headquartered and mainly based at the Royal Brunei Air Force Base, Rimba, opposite the Brunei International Airport (BIA).

; *

403 Helicopter Operational Training Squadron 403 "City of Calgary" (Helicopter) Operational Training Squadron (403 Sqn) is a squadron of the Royal Canadian Air Force (RCAF) located at CFB Gagetown, Canadian Forces Base Gagetown. It is equipped with CH-146 Griffons and provides operationa ...

408 Tactical Helicopter Squadron 408 Tactical Helicopter Squadron (408 THS) () is a unit of 1 Wing, Kingston. It is co-located with 1 Canadian Mechanized Brigade Group at Canadian Forces Base (CFB) Edmonton. Equipped with 16 CH-146 Griffon helicopters, it rotates a high com ...

422 Tactical Helicopter Squadron 4 (four) is a number, numeral and digit. It is the natural number following 3 and preceding 5. It is a square number, the smallest semiprime and composite number, and is considered unlucky in many East Asian cultures. Evolution of the Hi ...

** 424 Transport & Rescue Squadron **

427 Tactical Helicopter Squadron 427 Special Operations Aviation Squadron (427 SOAS) () is a tactical helicopter unit that provides aviation support to Canadian Special Operations Forces Command. The squadron is based at Garrison Petawawa (CFB Petawawa), Ontario with a fleet of ...

430 Tactical Helicopter Squadron 430 Tactical Helicopter Squadron is a unit of the Canadian Forces under the Royal Canadian Air Force. It operates Bell CH-146 Griffons from CFB Valcartier, near Quebec City in Quebec, Canada. History No. 430 Squadron RCAF was a unit of the Ro ...

444 Combat Support Squadron 444 Combat Support Squadron is an Air Force unit with the Canadian Armed Forces. Based at CFB Goose Bay, it provides helicopter support to the base operations. History 444 Fighter Squadron was formed in March 1953 at CFB St. Hubert, Quebec and ...

**VU 32 - pre-Unification

Royal Canadian Navy The Royal Canadian Navy (RCN; , ''MRC'') is the Navy, naval force of Canada. The navy is one of three environmental commands within the Canadian Armed Forces. As of February 2024, the RCN operates 12 s, 12 s, 4 s, 4 s, 8 s, and several auxiliary ...

Utility Squadron **Aerospace Engineering Test Establishment ** Base Flight Cold Lake ** Base Rescue Goose Bay Navy-hh1n-158256-070327-12-10

; *

Guyana Defence Force The Guyana Defence Force (GDF) is the military of Guyana, established in 1965. It has military bases across the nation. The Commander-in-Chief of the Defence Force is always the incumbent President of Guyana. The branches include the Army, Air F ...

; *

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 ...

; *

Jamaica Defence Force The Jamaica Defence Force (JDF) is the combined military of Jamaica, consisting of an infantry Regiment and Reserve Corps, an Air Wing, a Coast Guard fleet and a supporting Engineering Unit. The JDF is based upon the British military model, with ...

; *

Philippine Air Force The Philippine Air Force (PAF) () is the aerial warfare service branch of the Armed Forces of the Philippines. Initially formed as part of the Philippine Army as the Philippine Army Air Corps (PAAC) in 1935, the PAAC eventually saw combat ...

- 4 Units delivered to 250th Presidential Airlift Wing ,251 Special Airlift Squadron. Retired. ; *

Republic of Singapore Air Force The Republic of Singapore Air Force (RSAF) is the aerial service branch of the Singapore Armed Forces (SAF) responsible for controlling and defending the airspace of the country, and providing air support to the Army and Navy. It was establis ...

; * Army Air Corps ; *

Aircraft on display

Battleship Memorial Park Battleship Memorial Park is a military history park and museum on the western shore of Mobile Bay in Mobile, Alabama. Its notable aircraft and museum ships include the and . ''Alabama'' and ''Drum'' are National Historic Landmarks; the park a ...

, Mobile, Alabama, U.S. * CH-135 135114 -

Canada Aviation and Space Museum The Canada Aviation and Space Museum () (formerly the Canada Aviation Museum (''Musée de l'aviation du Canada'') and National Aeronautical Collection (''Collection aéronautique nationale'')) is Canada's national aviation history museum. The m ...

Ontario Ontario is the southernmost Provinces and territories of Canada, province of Canada. Located in Central Canada, Ontario is the Population of Canada by province and territory, country's most populous province. As of the 2021 Canadian census, it ...

Canada Canada is a country in North America. Its Provinces and territories of Canada, ten provinces and three territories extend from the Atlantic Ocean to the Pacific Ocean and northward into the Arctic Ocean, making it the world's List of coun ...

* CH-135 135102 -

* UH-1N 159198 –

Flying Leatherneck Aviation Museum The Flying Leatherneck Aviation Museum is a United States Marine Corps aviation museum currently located at the Orange County Great Park in Irvine, California. The museum contains exhibits and artifacts relating to the history and legacy of Unit ...

at MCAS Miramar,

San Diego, California San Diego ( , ) is a city on the Pacific coast of Southern California, adjacent to the Mexico–United States border. With a population of over 1.4 million, it is the List of United States cities by population, eighth-most populous city in t ...

Specifications (USMC UH-1N, as modified)

Gallery

BellCH-135TwinHuey135102.JPG, CH-135 Twin Huey 135102 serving with the

Multinational Force and Observers The Multinational Force and Observers (MFO) is an international peacekeeping force overseeing the terms of the peace treaty between Egypt and Israel. The MFO generally operates in and around the Sinai peninsula, ensuring free navigation through ...

Sinai, Egypt, 1989. BellCH-135TwinHuey135137.JPG, CH-135 Twin Huey 135137 in the original blue-gray and green camouflage pattern worn by these aircraft prior to 1986/88. BellCH135135TwinHuey.JPG, CH-135 Twin Huey 135135 in the early-style SAR markings, 1988. This aircraft was serving with Base Rescue Goose Bay and had formerly been assigned to 424 Transport & Rescue Squadron,

. BellCH-135TwinHuey135127.JPG, CH-135 Twin Huey 135127 from Base Rescue Goose Bay in the later SAR scheme used after 1986–88. BellCH-135TwinHuey135103A.JPG, CH-135 Twin Huey 135103 in special flight test markings. The aircraft was used by the Aerospace Engineering Test Establishment at

CFB Cold Lake Canadian Forces Base Cold Lake , abbreviated as CFB Cold Lake, is a Canadian Forces Base in the City of Cold Lake, Alberta. The facility is operated as an air force base by the Royal Canadian Air Force (RCAF) and is approximately south of the ...

, 1987. BellCH-135TwinHuey135103B.JPG , CH-135 Twin Huey 135103 after repainting in anti-IR olive and green scheme En-MFO1.JPG , Canadian CH-135 Twin Hueys serving with the

Sinai, Egypt 1989 CH135TwinHueyBadge.JPG, CH-135 Twin Huey badge worn by some

air and ground crew, 1980s 408UTTHFltBadge.JPG,

UTTH Flight badge worn by CH-135 Twin Huey crews circa 1990. The badge is based on the shield of the province of

Alberta Alberta is a Provinces and territories of Canada, province in Canada. It is a part of Western Canada and is one of the three Canadian Prairies, prairie provinces. Alberta is bordered by British Columbia to its west, Saskatchewan to its east, t ...

. Bell UH-1N Iroquois (212), USA - Air Force AN1269283.jpg, UH-1N serving with the

1st Helicopter Squadron The 1st Helicopter Squadron is a United States Air Force unit based at Joint Base Andrews, Maryland reporting to the 316th Operations Group, administratively controlled by Air Force District of Washington. Mission The 1st Helicopter Squadr ...

at Joint Base Andrews.

References

Citations

Bibliography

* Chant, Christopher. ''Fighting Helicopters of the 20th Century''. Graham Beehag Books, Christchurch, Dorset, England, 1996. * Debay, Yves. ''Combat Helicopters''. France: Histoire & Collections, 1996. * Drendel, Lou. ''Huey''. Squadron/Signal Publications, Carrollton, Texas, 1983. . * Eden, Paul. "Bell 212/412". ''Encyclopedia of Modern Military Aircraft''. London: Amber Books, 2004. . * Francillon, Rene, J. ''Vietnam: The War in the Air'', New York: Arch Cape Press, 1987. * Frawley, Gerard. ''The International Directory of Military Aircraft'', Aerospace Publications Pty Ltd, 2002. . * Green, William. ''Observers Aircraft'', Frederick Warne Publishing, 1980. . * Hoyle, Craig. "World Air Forces Directory". ''

Flight International ''Flight International'', formerly ''Flight'', is a monthly magazine focused on aerospace. Published in the United Kingdom and founded in 1909 as "A Journal devoted to the Interests, Practice, and Progress of Aerial Locomotion and Transport", i ...

'', Vol. 182, No. 5370. pp. 40–64. ISSN 0015-3710. * Mesko, Jim, ''Airmobile: The Helicopter War in Vietnam''. Squadron Signal Publications, 1984. * Mutza, Wayne. "Covertly to Cambodia". ''

Air Enthusiast ''Air Enthusiast'' was a British, bi-monthly, aviation magazine, published by the Key Publishing group. Initially begun in 1974 as ''Air Enthusiast Quarterly'', the magazine was conceived as a historical adjunct to ''Air International'' magaz ...

'', Thirty-two, December 1986–April 1987. pp. 22–31. ISSN 0143-5450. * Mutza, Wayne. ''UH-1 Huey in action''. Carrollton, TX: Squadron/Signal Publications, 1986. . * Mutza, Wayne. ''UH-1 Huey in Colors''. Carrollton, TX: Squadron/Signal Publications, 1992. . * Shaw, Robbie: ''Superbase 18 Cold Lake- Canada's Northern Guardians'', Osprey Publishing, London, 1990.
Specifications for 204, 205 and 214 Huey Plus
* Wood, Derek. ''Jane's World Aircraft Recognition Handbook'', Jane's Publishing Company 1985. .

External links

UH-1N page
an

UH-1N Huey fact sheet on USAF site

{{AircraftDesignationNavboxShell , 1={{US helicopters , 2={{Canadian Forces aircraft , 3={{Italian military aircraft , 4={{Italian Army helicopter designations , 5={{Thai helicopter designations , 6={{Spanish helicopters H-001Y, N

UH-1N The Bell UH-1N Twin Huey is a medium military helicopter designed and produced by the American aerospace manufacturer Bell Helicopter. It is a member of the extensive Huey family, the initial version was the CUH-1N Twin Huey (later CH-135 Twin ...

1960s United States military utility aircraft Search and rescue helicopters 1960s United States helicopters Twin-turbine helicopters Aircraft first flown in 1969 Single-rotor helicopters Aircraft with skid landing gear