Lockheed U-2
Encyclopedia

The Lockheed U-2, nicknamed "Dragon Lady", is a single-engine, very high-altitude reconnaissance aircraft
Reconnaissance aircraft
A reconnaissance aircraft is a manned military aircraft designed, or adapted, to carry out aerial reconnaissance.-History:The majority of World War I aircraft were reconnaissance designs...

 operated by the United States Air Force
United States Air Force
The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...

 (USAF) and previously flown by the Central Intelligence Agency
Central Intelligence Agency
The Central Intelligence Agency is a civilian intelligence agency of the United States government. It is an executive agency and reports directly to the Director of National Intelligence, responsible for providing national security intelligence assessment to senior United States policymakers...

 (CIA). It provides day and night, very high-altitude (70000 feet (21,336 m)), all-weather intelligence gathering. The aircraft is also used for electronic sensor research and development, satellite
Satellite
In the context of spaceflight, a satellite is an object which has been placed into orbit by human endeavour. Such objects are sometimes called artificial satellites to distinguish them from natural satellites such as the Moon....

 calibration, and satellite data validation.

Development

In the early 1950s, with Cold War
Cold War
The Cold War was the continuing state from roughly 1946 to 1991 of political conflict, military tension, proxy wars, and economic competition between the Communist World—primarily the Soviet Union and its satellite states and allies—and the powers of the Western world, primarily the United States...

 tensions on the rise, the U.S. military desired better strategic reconnaissance to help determine Soviet capabilities and intentions. The existing reconnaissance aircraft, primarily bombers converted for reconnaissance duty, were vulnerable to anti-aircraft artillery, missiles, and fighters. It was thought an aircraft that could fly at 70000 feet (21,336 m) would be beyond the reach of Soviet fighters, missiles, and even radar. This would allow overflights (knowingly violating Soviet airspace) to take aerial photographs.
Under the code name "Bald Eagle", the Air Force gave contracts to Bell Aircraft
Bell Aircraft
The Bell Aircraft Corporation was an aircraft manufacturer of the United States, a builder of several types of fighter aircraft for World War II but most famous for the Bell X-1, the first supersonic aircraft, and for the development and production of many important civilian and military helicopters...

, Martin Aircraft
Glenn L. Martin Company
The Glenn L. Martin Company was an American aircraft and aerospace manufacturing company that was founded by the aviation pioneer Glenn L. Martin. The Martin Company produced many important aircraft for the defense of the United States and its allies, especially during World War II and the Cold War...

, and Fairchild Engine and Airplane to develop proposals for the new reconnaissance aircraft. Officials at Lockheed Aircraft Corporation
Lockheed Corporation
The Lockheed Corporation was an American aerospace company. Lockheed was founded in 1912 and later merged with Martin Marietta to form Lockheed Martin in 1995.-Origins:...

 heard about the project and asked aeronautical engineer Clarence "Kelly" Johnson
Clarence Johnson
Clarence Leonard "Kelly" Johnson was an aircraft engineer and aeronautical innovator. As a member and first team leader of the Lockheed Skunk Works, Johnson worked for more than four decades and is said to have been an "organizing genius"...

 to come up with a design. Johnson was a brilliant designer, responsible for the P-38, and the P-80. He was also known for completing projects ahead of schedule, working in a separate division of the company jokingly called the Skunk Works
Skunk works
Skunk Works is an official alias for Lockheed Martin’s Advanced Development Programs , formerly called Lockheed Advanced Development Projects. Skunk Works is responsible for a number of famous aircraft designs, including the U-2, the SR-71 Blackbird, the F-117 Nighthawk, and the F-22 Raptor...

.

Johnson's design, called the CL-282, married long glider
Glider (sailplane)
A glider or sailplane is a type of glider aircraft used in the sport of gliding. Some gliders, known as motor gliders are used for gliding and soaring as well, but have engines which can, in some cases, be used for take-off or for extending a flight...

-like wings to the fuselage of another of his designs, the Lockheed F-104 Starfighter. To save weight, his initial design did not have conventional landing gear, taking off from a dolly and landing on skids. The design was rejected by the Air Force, but caught the attention of several civilians on the review panel, notably Edwin Land, the father of instant photography. Land proposed to CIA director Allen Dulles that his agency should fund and operate this aircraft. After a meeting with President Eisenhower, Lockheed received a $22.5 million contract for the first 20 aircraft. It was renamed the U-2, with the "U" referring to the deliberately vague designation "utility". The CIA assigned the cryptonym "AQUATONE" to the project, with the Air Force using the name "OILSTONE" for their support to the CIA.

The first flight occurred at the Groom Lake
Groom Lake
Groom Lake is a salt flat in Nevada used for runways of the Nellis Bombing Range Test Site airport on the north of the Area 51 USAF military installation. The lake at elevation is ~ from north to south and from east to west at its widest point...

 test site (Area 51
Area 51
Area 51 is a military base, and a remote detachment of Edwards Air Force Base. It is located in the southern portion of Nevada in the western United States, 83 miles north-northwest of downtown Las Vegas. Situated at its center, on the southern shore of Groom Lake, is a large military airfield...

) on 1 August 1955, during what was only intended to be a high-speed taxi run. The sailplane-like wings were so efficient that the aircraft jumped into the air at 70 knots (137.2 km/h).
James Baker
James Gilbert Baker
James Gilbert Baker was an American astronomer and designer of optics systems.-Biography:He was born in Louisville, Kentucky to Jesse B. Baker and Hattie M. Stallard, the fourth child of that couple. He attended Louisville duPont Manual High School then majored in mathematics at the University of...

 developed the optics for a large-format camera to be used in the U-2 while working for Perkin-Elmer. These new cameras had a resolution of 2.5 feet (76.2 cm) from an altitude of 60000 feet (18,288 m). Balancing is so critical on the U-2 that the camera had to use a split film, with reels on one side feeding forward while those on the other side feed backward, thus maintaining a balanced weight distribution through the whole flight.

When the first overflights of the Soviet Union were tracked by radar, the CIA initiated Project RAINBOW
Project Rainbow
Project Rainbow was the name given by the CIA to a research project aimed at reducing the radar cross section of the Lockheed U-2 to reduce the chance that it would be detected and tracked by Soviet radars during its overflights of the USSR.-Early Flights:...

 to reduce the U-2's radar cross section
Radar cross section
Radar cross section is a measure of how detectable an object is with a radar. A larger RCS indicates that an object is more easily detected.An object reflects a limited amount of radar energy...

. This effort ultimately proved unsuccessful, and work began on a follow-on aircraft, which resulted in the Lockheed A-12 Blackbird.

Manufacturing was restarted in the 1980s to produce TR-1, an updated and modernized design of the U-2.

Design

The unique design that gives the U-2 its remarkable performance also makes it a difficult aircraft to fly. It was designed and manufactured for minimum airframe weight, which results in an aircraft with little margin for error. Most aircraft were single-seat versions, with only five two-seat trainer versions known to exist. Early U-2 variants were powered by Pratt & Whitney J57 turbojet engines. The U-2C and TR-1A variants used the more powerful Pratt & Whitney J75 turbojet. The U-2S and TU-2S variants incorporated the even more powerful General Electric F118
General Electric F118
|-See also:-External links:* - The F110 Engine Family...

 turbofan engine.

High-aspect-ratio wings give the U-2 some glider
Glider (sailplane)
A glider or sailplane is a type of glider aircraft used in the sport of gliding. Some gliders, known as motor gliders are used for gliding and soaring as well, but have engines which can, in some cases, be used for take-off or for extending a flight...

-like characteristics, with a lift-to-drag ratio
Lift-to-drag ratio
In aerodynamics, the lift-to-drag ratio, or L/D ratio, is the amount of lift generated by a wing or vehicle, divided by the drag it creates by moving through the air...

 estimated in the high 20s. To maintain their operational ceiling of 70000 feet (21,336 m), the U-2A and U-2C models (no longer in service) must fly very near their maximum speed. The aircraft's stall speed at that altitude is only 10 knots (19.6 km/h) below its maximum speed. This narrow window was referred to by the pilots as the "coffin corner
Coffin corner (aviation)
The coffin corner is the altitude at or near which a fast fixed-wing aircraft's stall speed is equal to the critical Mach number, at a given gross weight and G-force loading. At this altitude the airplane becomes nearly impossible to keep in stable flight...

". For 90% of the time on a typical mission the U-2 was flying within only five knots above stall, which might cause a decrease in altitude likely to lead to detection, and additionally might overstress the lightly built airframe.

The U-2's flight controls are designed around the normal flight envelope and altitude that the aircraft was intended to fly in. The controls provide feather-light control response at operational altitude. However, at lower altitudes, the higher air density and lack of a power-assisted control system makes the aircraft very difficult to fly. Control inputs must be extreme to achieve the desired response in flight attitude, and a great deal of physical strength is needed to operate the controls in this manner.

The U-2 is very sensitive to crosswinds which, together with its tendency to float over the runway, makes the U-2 notoriously difficult to land. As the aircraft approaches the runway, the cushion of air provided by the high-lift wings in ground effect is so pronounced that the U-2 will not land unless the wing is fully stalled. To assist the pilot, the landing U-2 is paced by a chase car (usually a "souped-up" performance model including a Ford Mustang SSP
Ford Mustang SSP
The Ford Mustang SSP was a lightweight police car package based on the Ford Mustang produced between 1982-1993. The car was meant to provide a speedier option for police departments in lieu of other full sized sedans on the market at the time. The SSP abbreviation means Special Service Package,...

, Chevrolet Camaro B4C, Pontiac GTO
Pontiac GTO
The Pontiac GTO is an automobile built by Pontiac Division of General Motors in the United States from 1964 to 1974, and by GM subsidiary Holden in Australia from 2004 to 2006. It is considered an innovative, and now classic muscle car of the 1960s and 1970s...

, and the Pontiac G8 GT
Pontiac G8
The Pontiac G8 is a rear-wheel drive sedan that was produced by Holden, the Australian General Motors subsidiary. The G8, a rebadged Holden Commodore, was released in early 2008 for the 2008 model year in the United States, and in 2008 for the 2009 model year in Canada. Production stopped in...

) with an assistant (another U-2 pilot) who "talks" the pilot down by calling off the declining height of the aircraft in feet as it decreases in airspeed.

Instead of the typical tricycle landing gear, the U-2 uses a bicycle configuration with a forward set of main wheels located just behind the cockpit, and a rear set of main wheels located behind the engine. The rear wheels are coupled to the rudder to provide steering during taxiing. To maintain balance while taxiing, two auxiliary wheels, called "pogos" are added for takeoff. These fit into sockets underneath each wing at about mid-span, and fall off during takeoff. To protect the wings during landing, each wingtip has a titanium skid. After the U-2 comes to a halt, the ground crew re-installs the pogos one wing at a time, then the aircraft taxis to parking.

Because of the high operating altitude, the pilot must wear the equivalent of a space suit
Space suit
A space suit is a garment worn to keep an astronaut alive in the harsh environment of outer space. Space suits are often worn inside spacecraft as a safety precaution in case of loss of cabin pressure, and are necessary for extra-vehicular activity , work done outside spacecraft...

. The suit delivers the pilot's oxygen supply and emergency protection in case cabin pressure is lost at altitude (the cabin provides pressure equivalent to about 29,000 feet / 8,800 meters). To prevent hypoxia
Hypoxia (medical)
Hypoxia, or hypoxiation, is a pathological condition in which the body as a whole or a region of the body is deprived of adequate oxygen supply. Variations in arterial oxygen concentrations can be part of the normal physiology, for example, during strenuous physical exercise...

 and decrease the chance of decompression sickness
Decompression sickness
Decompression sickness describes a condition arising from dissolved gases coming out of solution into bubbles inside the body on depressurization...

, pilots don a full pressure suit and begin breathing 100% oxygen one hour prior to launch to remove nitrogen from the body; while moving from the building to the aircraft they breathe from a portable oxygen supply.
The aircraft carries a variety of sensors in the nose, Q-bay (behind the cockpit, also known as the camera bay), and wing pods. The U-2 is capable of simultaneously collecting signals, imagery intelligence and air samples. Imagery intelligence sensors include either wet film photo, electro-optic or radar imagery – the latter from the Raytheon
Raytheon
Raytheon Company is a major American defense contractor and industrial corporation with core manufacturing concentrations in weapons and military and commercial electronics. It was previously involved in corporate and special-mission aircraft until early 2007...

 ASARS-2
ASARS-2
ASARS-2 is the Advanced Synthetic Aperture Radar System carried on some variants of the Lockheed U-2 reconnaissance aircraft. Its mission is similar to the older ASARS-1 system which was used on the SR-71 Blackbird....

 system. It can use both line-of-sight and beyond-line-of-sight data links. One of the most unusual instruments in the newest version of the U-2 is the off-the-shelf Sony
Sony
, commonly referred to as Sony, is a Japanese multinational conglomerate corporation headquartered in Minato, Tokyo, Japan and the world's fifth largest media conglomerate measured by revenues....

 video camera that functions as a digital replacement for the purely optical viewsight (an upside down periscope-like viewing device) that was used in older variants to get a precise view of the terrain directly below the aircraft, especially during landing.

United States

Though the U.S. Air Force and Navy would eventually fly the U-2, it was originally a CIA operation, Project Dragon Lady, run through the Office of Scientific Intelligence
Office of Scientific Intelligence
Office of Scientific Intelligence was the name of a department of the Central Intelligence Agency. In 1963, it was incorporated into the Directorate of Science & Technology.-Pop culture:...

. Due to the political implications of a military aircraft invading a country's airspace, only CIA U-2s conducted overflights. The pilots had to resign their military commissions before joining the CIA as civilians, a process they referred to as "sheep dipping". As with CIA involvement, besides the normal serial number for each aircraft produced, each U-2 also has an "Article Number" assigned, and each U-2 would be referred to with its article number on classified internal documents/memos. The prototype U-2, Article 341, never received an Air Force serial.

As often happens with new aircraft designs, there were several operational accidents, some fatal. The first fatal accident was on 15 May 1956, when the pilot stalled the aircraft during a post-takeoff maneuver which was intended to drop off the wingtip outrigger wheels. The second occurred three months later, on 31 August when the pilot stalled the aircraft immediately after takeoff. Two weeks later, a third aircraft disintegrated during ascent, also killing the pilot. There were a number of other non-fatal incidents, including at least one which resulted in the loss of the aircraft.

Once U-2 units became operational, two units were deployed to Europe and one to the Far East. The first U-2 overflight of the Soviet Union occurred on 4 July 1956. Leaving from Wiesbaden
Wiesbaden
Wiesbaden is a city in southwest Germany and the capital of the federal state of Hesse. It has about 275,400 inhabitants, plus approximately 10,000 United States citizens...

, Germany, the pilot Hervey Stockman flew over Poland, Belorussia, and the Soviet Baltic, before returning to Wiesbaden. In 1957, one of the European units was based at the Giebelstadt Army Airfield
Giebelstadt Army Airfield
Giebelstadt Army Airfield is a closed military airfield located in Germany southwest of Giebelstadt ; approximately 250 miles southwest of Berlin. It was turned over to the German government on 23 June 2006 and is now a general aviation airport....

, Germany, and the Far Eastern unit was based at the Naval Air Facility Atsugi
Naval Air Facility Atsugi
is a naval air base located in the cities of Yamato and Ayase in Kanagawa Prefecture, Japan. It is the largest United States Navy air base in the Pacific Ocean and houses the squadrons of Carrier Air Wing 5, which deploys with the aircraft carrier...

, Japan.
The U-2 came to public attention when CIA pilot Gary Powers was shot down over Soviet territory on 1 May 1960, causing the U-2 incident.

On 14 October 1962, a U-2 from the 4080th Strategic Reconnaissance Wing, based at Laughlin Air Force Base
Laughlin Air Force Base
Laughlin Air Force Base is a facility of the United States Air Force located five miles east of the central business district of Del Rio, Texas.-Overview:...

 near Del Rio
Del Rio, Texas
Del Rio is a border city in and the county seat of Val Verde County, Texas, United States.. Del Rio is connected with Ciudad Acuña via the Lake Amistad Dam International Crossing and Del Río-Ciudad Acuña International Bridge...

, Texas, and piloted by Major Richard S. Heyser
Richard S. Heyser
Richard S. Heyser was a pilot in the United States Air Force whose photographs taken in a Lockheed U-2 revealed Soviet medium-range ballistic missiles in Cuba, precipitating the Cuban missile crisis in 1962.Lt. Col...

, photographed the Soviet military installing nuclear warhead missiles in Cuba
Cuba
The Republic of Cuba is an island nation in the Caribbean. The nation of Cuba consists of the main island of Cuba, the Isla de la Juventud, and several archipelagos. Havana is the largest city in Cuba and the country's capital. Santiago de Cuba is the second largest city...

, precipitating the Cuban Missile Crisis
Cuban Missile Crisis
The Cuban Missile Crisis was a confrontation among the Soviet Union, Cuba and the United States in October 1962, during the Cold War...

. Heyser concluded this flight at McCoy AFB in Orlando
Orlando, Florida
Orlando is a city in the central region of the U.S. state of Florida. It is the county seat of Orange County, and the center of the Greater Orlando metropolitan area. According to the 2010 US Census, the city had a population of 238,300, making Orlando the 79th largest city in the United States...

, Florida, where the 4080th established a U-2 operating location for the duration of the crisis. On 27 October 1962, in flight from McCoy AFB, a U-2 was shot down over Cuba by two SA-2 Guideline surface-to-air missiles, killing the pilot, Major Rudolf Anderson, Jr. Anderson was posthumously awarded the first Air Force Cross
Air Force Cross (United States)
The Air Force Cross is the second highest military decoration that can be awarded to a member of the United States Air Force. The Air Force Cross is the Air Force decoration equivalent to the Distinguished Service Cross and the Navy Cross .The Air Force Cross is awarded for extraordinary heroism...

. U-2 reconnaissance flights over Cuba continued at least until the 1970s under the code name OLYMPIC FIRE.

In 1963, the CIA started project Whale Tale to develop carrier-based U-2Gs to overcome range limitations. During development of the capability, CIA pilots took off and landed U-2Gs on the aircraft carrier and other ships. The U-2G was used only twice operationally. Both flights occurred from USS Ranger in May 1964 to observe France's development of an atomic bomb test range at Moruroa
Moruroa
Moruroa , also historically known as Aopuni, is an atoll which forms part of the Tuamotu Archipelago in French Polynesia in the southern Pacific Ocean...

 in French Polynesia
French Polynesia
French Polynesia is an overseas country of the French Republic . It is made up of several groups of Polynesian islands, the most famous island being Tahiti in the Society Islands group, which is also the most populous island and the seat of the capital of the territory...

.

In early 1964, the Strategic Air Command
Strategic Air Command
The Strategic Air Command was both a Major Command of the United States Air Force and a "specified command" of the United States Department of Defense. SAC was the operational establishment in charge of America's land-based strategic bomber aircraft and land-based intercontinental ballistic...

 (SAC) sent a detachment of U-2s from the 4080th to South Vietnam
South Vietnam
South Vietnam was a state which governed southern Vietnam until 1975. It received international recognition in 1950 as the "State of Vietnam" and later as the "Republic of Vietnam" . Its capital was Saigon...

 for high-altitude reconnaissance missions over North Vietnam
North Vietnam
The Democratic Republic of Vietnam , was a communist state that ruled the northern half of Vietnam from 1954 until 1976 following the Geneva Conference and laid claim to all of Vietnam from 1945 to 1954 during the First Indochina War, during which they controlled pockets of territory throughout...

. On 5 April 1965, U-2s from the 4028th SRS (Strategic Reconnaissance Squadron) took photos of SAM-2 sites near Hanoi
Hanoi
Hanoi , is the capital of Vietnam and the country's second largest city. Its population in 2009 was estimated at 2.6 million for urban districts, 6.5 million for the metropolitan jurisdiction. From 1010 until 1802, it was the most important political centre of Vietnam...

 and Haiphong
Haiphong
, also Haiphong, is the third most populous city in Vietnam. The name means, "coastal defence".-History:Hai Phong was originally founded by Lê Chân, the female general of a Vietnamese revolution against the Chinese led by the Trưng Sisters in the year 43 C.E.The area which is now known as Duong...

 harbor. On 11 February 1966, the 4080th Wing was redesignated the 100th SRW and moved to Davis-Monthan AFB, Arizona
Arizona
Arizona ; is a state located in the southwestern region of the United States. It is also part of the western United States and the mountain west. The capital and largest city is Phoenix...

. The SRS detachment at Bien Hoa AB, South Vietnam, was redesignated the 349th SRS.

The only loss of a U-2 during combat operations occurred on 8 October 1966, when Major Leo Stewart, flying with the 349th Strategic Reconnaissance Squadron, developed mechanical problems high over North Vietnam. The U-2 managed to return to South Vietnam where Stewart ejected safely. The U-2 crashed near its base at Bien Hoa. In July 1970, the 349th SRS at Bien Hoa moved to Thailand
Thailand
Thailand , officially the Kingdom of Thailand , formerly known as Siam , is a country located at the centre of the Indochina peninsula and Southeast Asia. It is bordered to the north by Burma and Laos, to the east by Laos and Cambodia, to the south by the Gulf of Thailand and Malaysia, and to the...

 and was redesignated the 99th SRS
99th Reconnaissance Squadron
The 99th Reconnaissance Squadron is part of the 9th Reconnaissance Wing at Beale Air Force Base, California. It operates U-2 Dragon Lady aircraft flying reconnaissance missions around the world.-Mission:...

, remaining there until March 1976.

In 1969, the larger U-2Rs were flown from the aircraft carrier . The U-2 carrier program is believed to have been halted after 1969.

In August 1970, two U-2Rs were deployed by NRO to cover the Israeli-Egypt conflict under the code name EVEN STEVEN.

In June 1976, the U-2s of the 100th SRW were transferred to the 9th SRW at Beale Air Force Base
Beale Air Force Base
Beale Air Force Base is a United States Air Force base located approximately east of Marysville, California. Originally known as Camp Beale....

, California, and merged with SR-71 aircraft operations there. When Strategic Air Command
Strategic Air Command
The Strategic Air Command was both a Major Command of the United States Air Force and a "specified command" of the United States Department of Defense. SAC was the operational establishment in charge of America's land-based strategic bomber aircraft and land-based intercontinental ballistic...

 was disestablished in the early 1990s, the wing was transferred to the new Air Combat Command
Air Combat Command
Air Combat Command is a major command of the United States Air Force. ACC is one of ten major commands , reporting to Headquarters, United States Air Force ....

 (ACC) and redesignated the 9th Reconnaissance Wing
9th Reconnaissance Wing
The 9th Reconnaissance Wing is a United States Air Force unit assigned to the Air Combat Command Eighth Air Force. It is stationed at Beale Air Force Base, California...

 (9 RW).

In 1977, a U-2 was retrofitted with an upward-looking window so that it could be used for high-altitude astronomical observations of the cosmic microwave background (CMB). This experiment was the first to measure definitively the motion of the galaxy relative to the CMB, and established an upper limit on the rotation of the universe as a whole.

In 1984, during a major NATO exercise, Royal Air Force
Royal Air Force
The Royal Air Force is the aerial warfare service branch of the British Armed Forces. Formed on 1 April 1918, it is the oldest independent air force in the world...

 Flight Lieutenant Mike Hale intercepted a U-2 at a height of 66000 feet (20,116.8 m), where the aircraft had previously been considered safe from interception. Hale climbed to 88000 feet (26,822.4 m) in his Lightning F3
English Electric Lightning
The English Electric Lightning is a supersonic jet fighter aircraft of the Cold War era, noted for its great speed and unpainted natural metal exterior finish. It is the only all-British Mach 2 fighter aircraft. The aircraft was renowned for its capabilities as an interceptor; Royal Air Force ...

.

In 1989, a U-2R of 9 RW, Detachment 5, flying out of Patrick Air Force Base
Patrick Air Force Base
Patrick Air Force Base is a United States Air Force Base located between Satellite Beach and Cocoa Beach, in Brevard County, Florida, United States. It was named in honor of Major General Mason Patrick. An Air Force Space Command base, it is home to the 45th Space Wing...

, Florida successfully photographed a space shuttle launch for NASA
NASA
The National Aeronautics and Space Administration is the agency of the United States government that is responsible for the nation's civilian space program and for aeronautics and aerospace research...

 to assist in identifying the cause of tile loss during launch discovered in the initial post-Challenger missions.

On 19 November 1998, a NASA ER-2 research aircraft set a world record for altitude of 20479 metres (67,188.3 ft) in horizontal flight in the 12000 kilograms (26,455.5 lb) to 16000 kilograms (35,274 lb) weight class.

Recent use and planned retirement

The U-2 remains in frontline service more than 50 years after its first flight despite the advent of surveillance satellites. This is primarily due to the ability to direct flights to objectives at short notice, which satellites cannot do. The U-2 has outlasted its Mach 3 SR-71 replacement, which was retired in 1998.

A classified budget document approved by the Pentagon
The Pentagon
The Pentagon is the headquarters of the United States Department of Defense, located in Arlington County, Virginia. As a symbol of the U.S. military, "the Pentagon" is often used metonymically to refer to the Department of Defense rather than the building itself.Designed by the American architect...

 on 23 December 2005 called for the termination of the U-2 program no earlier than 2012, with some aircraft being retired by 2007. In January 2006, Secretary of Defense Donald Rumsfeld
Donald Rumsfeld
Donald Henry Rumsfeld is an American politician and businessman. Rumsfeld served as the 13th Secretary of Defense from 1975 to 1977 under President Gerald Ford, and as the 21st Secretary of Defense from 2001 to 2006 under President George W. Bush. He is both the youngest and the oldest person to...

 announced the pending retirement of the U-2 fleet as a cost-cutting measure, and as part of a larger reorganization and redefinition of the Air Force's mission that includes the elimination of all but 56 B-52s and a complete reduction in the F-117 Nighthawk fleet. Rumsfeld said that this will not impair the Air Force's ability to gather intelligence, which will be done by satellites and a growing supply of unmanned RQ-4 Global Hawk
RQ-4 Global Hawk
The Northrop Grumman RQ-4 Global Hawk is an unmanned aerial vehicle used by the United States Air Force and Navy as a surveillance aircraft....

 reconnaissance aircraft.
Retirement of the U-2 has been delayed by gaps in capability if the fleet was removed from service. In 2009, the Air Force stated that it planned to extend the U-2 retirement from 2012 until 2014 or later to allow more time to field the RQ-4 Global Hawk
RQ-4 Global Hawk
The Northrop Grumman RQ-4 Global Hawk is an unmanned aerial vehicle used by the United States Air Force and Navy as a surveillance aircraft....

 as a replacement. Beginning in 2010, the RQ-170 Sentinel began replacing U-2s operating from Osan Air Base
Osan Air Base
Osan Air Base , is a United States Air Force facility located in the Songtan section of Pyeongtaek City, South Korea, south of Seoul. Despite its name, Osan AB is not within Osan City, which is to the north. The base is the home of the Pacific Air Forces' 51st Fighter Wing, and a number of tenant...

, South Korea.

Upgrades late in the War in Afghanistan gave the U-2 greater reconnaissance and threat-detection capability. As of early 2010, U-2s from the 99th Expeditionary Reconnaissance Squadron have flown over 200 missions in support of Operations Iraqi Freedom and Enduring Freedom; as well as Combined Joint Task Force – Horn of Africa.

A U-2 was stationed in Cyprus in March 2011 to help in the enforcement of the no-fly zone over Libya
2011 military intervention in Libya
On 19 March 2011, a multi-state coalition began a military intervention in Libya to implement United Nations Security Council Resolution 1973, which was taken in response to events during the 2011 Libyan civil war...

, and a U-2 stationed at Osan Air Base
Osan Air Base
Osan Air Base , is a United States Air Force facility located in the Songtan section of Pyeongtaek City, South Korea, south of Seoul. Despite its name, Osan AB is not within Osan City, which is to the north. The base is the home of the Pacific Air Forces' 51st Fighter Wing, and a number of tenant...

 in South Korea was used to provide imagery of the Japanese nuclear reactor damaged by the 11 March 2011 earthquake and tsunami.

In March 2011, it was projected that the US's fleet of 32 U-2s would be operated until 2015. The Obama administration requested $91 million to maintain the U-2 program. The Air Force will replace the U-2s with RQ-4s before fiscal year 2015. Proposed legislation would require that its replacement be a cost-savings over the U-2 before replacement could occur.

Republic of China (Taiwan)

The only other U-2 operator was the Republic of China
Republic of China
The Republic of China , commonly known as Taiwan , is a unitary sovereign state located in East Asia. Originally based in mainland China, the Republic of China currently governs the island of Taiwan , which forms over 99% of its current territory, as well as Penghu, Kinmen, Matsu and other minor...

 (Taiwan
Taiwan
Taiwan , also known, especially in the past, as Formosa , is the largest island of the same-named island group of East Asia in the western Pacific Ocean and located off the southeastern coast of mainland China. The island forms over 99% of the current territory of the Republic of China following...

), which flew missions mostly over the People's Republic of China (PRC). Since the 1950s, the Republic of China Air Force
Republic of China Air Force
The Republic of China Air Force is the aviation branch of the Republic of China Armed Forces. The ROCAF's primary mission is the defense of the airspace over and around Taiwan...

 had used the RB-57A/D aircraft for reconnaissance missions over the PRC, but suffered two losses when MiG-17
Mikoyan-Gurevich MiG-17
The Mikoyan-Gurevich MiG-17 is a high-subsonic fighter aircraft produced in the USSR from 1952 and operated by numerous air forces in many variants. Most MiG-17 variants cannot carry air-to-air missiles, but shot down many aircraft with its cannons...

s and SA-2
S-75 Dvina
The S-75 Dvina is a Soviet-designed, high-altitude, command guided, surface-to-air missile system...

 Surface-to-Air Missiles were able to intercept the aircraft.

In 1958, ROC and American authorities reached an agreement to create the 35th Squadron, nicknamed the Black Cat Squadron
Black Cat Squadron
The Black Cat Squadron was a squadron of the Republic of China Air Force that flew the U-2 surveillance plane out of Taoyuan Airbase in northern Taiwan, from 1961 to 1974. The formal designation of the squadron was the 35th Squadron, operating under the cover of a high altitude weather research...

, composed of two U-2Cs in Taoyuan Airbase in northern Taiwan, at an isolated part of the airbase. To create the typical misdirections at the time, the unit was created under the cover of high altitude weather research missions for ROCAF. To the US government, the 35th Squadron and any US CIA/USAF personnel assigned to the unit were known as Detachment H on all documents. But instead of being under normal USAF control, the project was known as Project RAZOR, and was run directly by CIA with USAF assistance.

Each of the 35th Squadron's operational missions had to be approved by both the US and the Taiwan/ROC presidents beforehand. To add another layer of security and secrecy to the project, all US military and CIA/government personnel stationed in Taoyuan assigned to Detachment H were issued official documents and ID with false names and cover titles as Lockheed employees/representatives in civilian clothes. The ROCAF pilots and ground support crew would never know their US counterpart's real name and rank/title, or which US government agencies they were dealing with.

A total of 26 out of 28 ROC pilots sent to the US completed training between 1959 and 1973, at Laughlin Air Force Base, Texas. On the night of 3 August 1959, a U-2 on a training mission, out of Laughlin AFB, Texas, piloted by Maj. Mike Hua of ROC Air Force, made a successful unassisted nighttime emergency landing at Cortez
Cortez, Colorado
The city of Cortez is a Home Rule Municipality that is the county seat and the most populous city of Montezuma County, Colorado, United States. The city population was 8,482 at the 2010 census...

, Colorado, that was later known as Miracle at Cortez, and Major Hua was later awarded the US Air Force Distinguished Flying Cross for saving the top secret aircraft.

In July 1960, the CIA provided the ROC with its first two U-2Cs, and in December the squadron flew its first mission over mainland China. Other countries were also covered from time to time by the 35th Squadron, such as North Korea, North Vietnam and Laos, but the main objective of the ROC 35th Squadron was to conduct reconnaissance missions assessing the PRC's nuclear capabilities. For this purpose the ROC pilots flew as far as Gansu
Gansu
' is a province located in the northwest of the People's Republic of China.It lies between the Tibetan and Huangtu plateaus, and borders Mongolia, Inner Mongolia, and Ningxia to the north, Xinjiang and Qinghai to the west, Sichuan to the south, and Shaanxi to the east...

 and other remote regions in northwest China. Some of the missions, due to mission requirements and range, plus to add some element of surprise, had the 35th Squadron's U-2s flying from or recovered at other US air bases in Southeast Asia and Eastern Asia, such as K-8 (Kunsan) in South Korea, or Tikhli in Thailand. All US airbases in the region were listed as emergency/ alternate recovery airfields and could be used besides the 35th Squadron's home base at Taoyuan airbase in Taiwan. Initially, all film taken by the Black Cat Squadron would be flown to Okinawa or Guam for processing and development, and the US forces would not share any of the mission photos with Taiwan. Only in late 1960s did the USAF agree to share a complete set of mission photos and help Taiwan set up a photo development and interpretation unit at Taoyuan AB.

In 1968, the ROC U-2C/F/G fleet was replaced with the newer U-2R. However, with the coming of the Sino-Soviet split
Sino-Soviet split
In political science, the term Sino–Soviet split denotes the worsening of political and ideologic relations between the People's Republic of China and the Union of Soviet Socialist Republics during the Cold War...

 and the rapprochement
Rapprochement
In international relations, a rapprochement, which comes from the French word rapprocher , is a re-establishment of cordial relations, as between two countries...

 between the US and the PRC, the ROC U-2 squadron stopped entering Chinese airspace, and instead only conducted electronic intelligence-gathering plus photo-reconnaissance missions with new Long-Range Oblique Reconnaissance (LOROP) cameras on the U-2R while flying over international waters. The last U-2 aircraft mission over mainland China took place on 16 March 1968. After that, all missions had the U-2 aircraft fly outside a buffer zone at least 20 nautical miles (37 km) around China.

During his visit to China in 1972, US President Richard Nixon
Richard Nixon
Richard Milhous Nixon was the 37th President of the United States, serving from 1969 to 1974. The only president to resign the office, Nixon had previously served as a US representative and senator from California and as the 36th Vice President of the United States from 1953 to 1961 under...

 promised the Chinese authorities to cease all reconnaissance missions near and over China, though this was also made practical because US photo satellites by 1972 were able to provide better overhead images without risking losing aircraft and pilots, or provoking international incidents. The last 35th Squadron mission was flown by Sungchou "Mike" Chiu on 24 May 1974.

At the end of ROC's U-2 operations, out of a total of 19 U-2C/F/G/R aircraft operated by the 35th Squadron from 1959 to 1974, 11 were lost. The squadron flew a total of about 220 missions, with about half over mainland China, resulting in five aircraft shot down, with three fatalities and two pilots captured, and another six U-2s lost in training with six pilots killed. On 29 July 1974, the two remaining U-2R aircraft in ROC possession were flown from Taoyuan AB in Taiwan to Edwards AFB, California, US, and turned over to the USAF.

Variants

Primary list

Sub-section source: Aerospaceweb.org


U-2A: Initial production, single-seat; J57-P-37A engine; 48 built
U-2B: Two-seat trainer; J57-P-31 engine; five built
U-2C: Enhanced single-seat model with J75-P-13 engine and modified engine intakes
U-2D: Enhanced two-seat trainer
U-2E: Aerial refueling capable, J57-powered
U-2F: Aerial refueling capable, J75-powered
U-2CT: Enhanced two-seat trainer rebuilt from U-2D airframes with relocation of the seats; six known converted
U-2G: A-models modified with reinforced landing gear, added arresting hook, and wing spoilers for US Navy carrier operations; three converted
U-2H: Aircraft carrier capable, aerial refueling capable
U-2R: C-models enlarged and improved with underwing pods and increased fuel capacity; 12 built. Initially designated TR-1A
U-2RT: Enhanced two-seat R-model trainer; one built. Initially designated TR-1B
U-2EPX: Proposed US Navy maritime surveillance
Surveillance
Surveillance is the monitoring of the behavior, activities, or other changing information, usually of people. It is sometimes done in a surreptitious manner...

 R-model; two built
WU-2: Atmospheric/weather research WU-model

TR-1A: All new "tactical recon" TR-model based on the U-2R with side-looking radar
Synthetic aperture radar
Synthetic-aperture radar is a form of radar whose defining characteristic is its use of relative motion between an antenna and its target region to provide distinctive long-term coherent-signal variations that are exploited to obtain finer spatial resolution than is possible with conventional...

, new avionics
Avionics
Avionics are electronic systems used on aircraft, artificial satellites and spacecraft.Avionic systems include communications, navigation, the display and management of multiple systems and the hundreds of systems that are fitted to aircraft to meet individual roles...

, and improved ECM
Electronic countermeasures
An electronic countermeasure is an electrical or electronic device designed to trick or deceive radar, sonar or other detection systems, like infrared or lasers. It may be used both offensively and defensively to deny targeting information to an enemy...

 equipment; 33 built
TR-1B: All new two-seat trainer for the TR-1A; two built
ER-2: Single-seat "earth resource" ER-model for NASA research
U-2S: New redesignation for the TR-1A; updated with a improved engine, improved sensors, and addition of a GPS system; 31 converted
TU-2S: New redesignated TR-1B two-seat trainer with improved engine; five converted

U-2E/F/H details

In May 1961, in a little-known attempt to extend the U-2's already considerable range, Lockheed modified six CIA U-2s and several USAF U-2s with aerial refueling equipment which allowed the aircraft to receive fuel from either the KC-97 or from the KC-135. This extended the aircraft's range from approximately 4000 to 8000 nmi (7,408 to 14,816 km) and extended its endurance to more than 14 hours. The J57-powered U-2Bs were re-designated U-2E and the J75
Pratt & Whitney JT4A
|-See also:-External links:*...

-powered U-2Cs were redesignated U-2F. The modified U-2s also included additional oxygen cylinder. However, pilot fatigue was not considered, and little use was made of the refueling capability. The one and only U-2H was both air-refueling capable and carrier-capable.

U-2R/S details

The U-2R, first flown in 1967, is significantly larger and more capable than the original aircraft. A tactical reconnaissance version, the TR-1A, first flew in August 1981. A distinguishing feature of these aircraft is the addition of a large instrumentation "superpod" under each wing. Designed for standoff tactical reconnaissance in Europe, the TR-1A was structurally identical to the U-2R. The 17th Reconnaissance Wing, Royal Air Force Station Alconbury
RAF Alconbury
RAF Alconbury is an active Royal Air Force station in Cambridgeshire, England. The airfield is adjacent to the Stukeleys [Great and Little] and located about northwest of Huntingdon; about north of London....

, England used operational TR-1As from 1983 until 1991. The last U-2 and TR-1 aircraft were delivered to the Air Force in October 1989. In 1992 all TR-1s and U-2s (all U-2Rs) were designated U-2Rs. The two-seat trainer variant of the TR-1, the TR-1B, was redesignated as the TU-2R. After upgrading with the F-118-101
General Electric F118
|-See also:-External links:* - The F110 Engine Family...

 engine, the former U-2Rs were designated the U-2S Senior Year.

ER-2 details

A derivative of the U-2 known as the ER-2 (Earth Resources −2), in NASA's white livery, is based at the Dryden Flight Research Center
Dryden Flight Research Center
The Dryden Flight Research Center , located inside Edwards Air Force Base, is an aeronautical research center operated by NASA. On March 26, 1976 it was named in honor of the late Hugh L. Dryden, a prominent aeronautical engineer who at the time of his death in 1965 was NASA's deputy administrator...

 and is used by NASA
NASA
The National Aeronautics and Space Administration is the agency of the United States government that is responsible for the nation's civilian space program and for aeronautics and aerospace research...

 for high-altitude civilian research including Earth resources, celestial observations, atmospheric chemistry and dynamics, and oceanic processes. Ironically, these were some of the specified "missions" of the original US government cover-up. Programs using the aircraft include the Airborne Science Program
Airborne Science Program
NASA's Airborne Science Program is administered from the NASA Dryden Flight Research Center, in Edwards, California. The program supports the sub-orbital flight requirements of NASA's Earth Science Enterprise...

, ERAST and Earth Science Enterprise
NASA Earth Science Enterprise
The NASA Earth Science Enterprise , formerly called Mission To Planet Earth , is a NASA research program "to develop a scientific understanding of the Earth system and its response to natural and human-induced changes to enable improved prediction of climate, weather, and natural hazards for...

. Landings are assisted by another pilot at speeds exceeding 120 miles per hour (53.6 m/s) in a chase car.

Operators

USA
  • United States Air Force
    United States Air Force
    The United States Air Force is the aerial warfare service branch of the United States Armed Forces and one of the American uniformed services. Initially part of the United States Army, the USAF was formed as a separate branch of the military on September 18, 1947 under the National Security Act of...

    • 9th Reconnaissance Wing
      9th Reconnaissance Wing
      The 9th Reconnaissance Wing is a United States Air Force unit assigned to the Air Combat Command Eighth Air Force. It is stationed at Beale Air Force Base, California...

      , Beale Air Force Base
      Beale Air Force Base
      Beale Air Force Base is a United States Air Force base located approximately east of Marysville, California. Originally known as Camp Beale....

      , California
      • 1st Reconnaissance Squadron
        1st Reconnaissance Squadron
        The 1st Reconnaissance Squadron is a United States Air Force reconnaissance training unit based at Beale Air Force Base, near Marysville, California. It is the oldest squadron in the Air Force, and the first organization to be established as a U.S. military flying unit...

      • 99th Reconnaissance Squadron
        99th Reconnaissance Squadron
        The 99th Reconnaissance Squadron is part of the 9th Reconnaissance Wing at Beale Air Force Base, California. It operates U-2 Dragon Lady aircraft flying reconnaissance missions around the world.-Mission:...

  • National Aeronautics and Space Administration, Moffett Federal Airfield
    Moffett Federal Airfield
    Moffett Federal Airfield , also known as Moffett Field, is a joint civil-military airport located between northern Mountain View and northern Sunnyvale, California, USA. The airport is near the south end of San Francisco Bay, northwest of San Jose. Formerly a United States Navy facility, the former...

    , California and Dryden Flight Research Center
    Dryden Flight Research Center
    The Dryden Flight Research Center , located inside Edwards Air Force Base, is an aeronautical research center operated by NASA. On March 26, 1976 it was named in honor of the late Hugh L. Dryden, a prominent aeronautical engineer who at the time of his death in 1965 was NASA's deputy administrator...

     / Edwards Air Force Base
    Edwards Air Force Base
    Edwards Air Force Base is a United States Air Force base located on the border of Kern County, Los Angeles County, and San Bernardino County, California, in the Antelope Valley. It is southwest of the central business district of North Edwards, California and due east of Rosamond.It is named in...

    , California


  • Republic of China Air Force
    Republic of China Air Force
    The Republic of China Air Force is the aviation branch of the Republic of China Armed Forces. The ROCAF's primary mission is the defense of the airspace over and around Taiwan...

      – operated U-2s during 1960–1974.
    • 35th Black Cat Squadron
      Black Cat Squadron
      The Black Cat Squadron was a squadron of the Republic of China Air Force that flew the U-2 surveillance plane out of Taoyuan Airbase in northern Taiwan, from 1961 to 1974. The formal designation of the squadron was the 35th Squadron, operating under the cover of a high altitude weather research...


Aircraft on display

A number of retired U-2 aircraft are currently on display in the United States, United Kingdom, Norway, and People's Republic of China.

China
  • Military Museum of the Chinese People's Revolution
    Military Museum of the Chinese People's Revolution
    The Military Museum of the Chinese People's Revolution, or China People's Revolution Military Museum is a museum located in Beijing, China immediately west of central Beijing in Haidian District...

    , Beijing. The wreckage of a U-2C (article 358) has been re-assembled and is on display in the aircraft exhibit hall. This airframe, flown by a pilot of the Republic of China Air Force, which was shot down on 10 January 1965, southwest of Beijing by a SA-2 missile.


Russia
  • Moscow Military Museum, the wreckage of the U-2C (article 360), flown by Francis Gary Powers, which was shot down on 1 May 1960 near Sverdlovsk (now Ekaterinburg) is on display.


Norway
  • Norsk Luftfartsmuseum, Bodo


United Kingdom
  • Imperial War Museum Duxford
    Imperial War Museum Duxford
    Imperial War Museum Duxford is a branch of the Imperial War Museum near the village of Duxford in Cambridgeshire, England. Britain's largest aviation museum, Duxford houses the museum's large exhibits, including nearly 200 aircraft, military vehicles, artillery and minor naval vessels in seven...

     (U-2CT)


United States
  • National Air and Space Museum
    National Air and Space Museum
    The National Air and Space Museum of the Smithsonian Institution holds the largest collection of historic aircraft and spacecraft in the world. It was established in 1976. Located in Washington, D.C., United States, it is a center for research into the history and science of aviation and...

    , Washington, DC. Article 347, 56–6680, the seventh U-2 built, a U-2C, is the oldest surviving airframe.
  • National Museum of the United States Air Force
    National Museum of the United States Air Force
    The National Museum of the United States Air Force is the official museum of the United States Air Force located at Wright-Patterson Air Force Base northeast of Dayton, Ohio. The NMUSAF is the world's largest and oldest military aviation museum with more than 360 aircraft and missiles on display...

    , Wright-Patterson AFB, Ohio.
  • Museum of Aviation
    Museum of Aviation
    The Museum of Aviation is the second-largest aerospace museum of the United States Air Force. The museum is located just outside Warner Robins, Georgia, and near Robins Air Force Base. It has a total of five different buildings containing 93 different aircraft on . The SR-71A Blackbird on display...

    , Robins AFB, Georgia
  • Laughlin AFB, Texas
  • Davis-Monthan AFB, Arizona
  • Edward F. Beale Museum, Beale AFB, California
  • Strategic Air and Space Museum
    Strategic Air and Space Museum
    The Strategic Air and Space Museum is a museum focusing on United States Air Force military aircraft and nuclear missiles located near Ashland, Nebraska, along Interstate 80 southwest of Omaha, Nebraska. The objective of the museum is to preserve and display historic aircraft, missile, and space...

    , near Offutt AFB and Ashland, Nebraska.

Notable appearances in media

In the television series Call to Glory
Call to Glory
Call to Glory was an American television series that aired 23 episodes during the 1984-1985 TV season on the ABC-TV network. Starring Craig T. Nelson as a USAF pilot, Colonel Raynor Sarnac. In the course of its production run, it drifted away from its original reasonably authentic setting and...

(ABC, 1984 to 1985), the U-2 was the "main ride" of US Air Force Colonel Raynor Sarnac from the October 1962 Cuba Crisis to 1979. The U-2 also appears prominently in the movie Thirteen Days
Thirteen Days (film)
Thirteen Days is a 2000 docudrama directed by Roger Donaldson about the Cuban Missile Crisis of 1962, seen from the perspective of the US political leadership. Kevin Costner stars, with Bruce Greenwood featured as John F. Kennedy....

(2000). On the BBC program James May at the Edge of Space
James May at the Edge of Space
James May at the Edge of Space is a British documentary in which television presenter James May came close to fulfilling his lifelong dream to be an astronaut by flying to the edge of space in a Lockheed U-2 spy plane...

(2009), James May
James May
James Daniel May is an English television presenter, journalist and writer. He is best known for his role as co-presenter of the award-winning motoring programme Top Gear alongside Jeremy Clarkson and Richard Hammond....

 of Top Gear fame, goes on a flight in a U-2.

The U-2 is mentioned in the Billy Joel
Billy Joel
William Martin "Billy" Joel is an American musician and pianist, singer-songwriter, and classical composer. Since releasing his first hit song, "Piano Man", in 1973, Joel has become the sixth best-selling recording artist and the third best-selling solo artist in the United States, according to...

 song "We Didn't Start the Fire
We Didn't Start the Fire
"We Didn't Start the Fire" is a song by Billy Joel. Its lyrics are made up from rapid-fire brief allusions to over a hundred headline events between March 1949 and 1989, when the song was released on his album Storm Front...

". The image of a Lockheed U-2 was used on the cover of the controversial 1991 EP released by the band Negativland
Negativland
Negativland is an experimental music and sound collage band which originated in the San Francisco Bay Area in the late 1970s. They took their name from a Neu! song, while their record label is named after another Neu! song...

 and titled U2
U2 (EP)
U2 is an EP by the experimental music and sound collage band Negativland, released in 1991. The EP and the band gained notoriety when lawyers representing Island Records, the record label of the band U2, sued over misleading artwork and the use of unauthorized sampling.-History:After Helter Stupid,...

.

The U-2 is also the "Spy Plane" as well as the "Counter Spy Plane" killstreaks in Call of Duty Black Ops.

Specifications (U-2S)

See also

External links

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