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The Sukhoi Su-17 (NATO reporting name: Fitter) is a Soviet variable-sweep wing fighter-bomber developed from the Sukhoi Su-7. It enjoyed a long career in Soviet, later Russian, service and was widely exported to Eastern Bloc and Middle Eastern air forces as the Su-20 and Su-22.
Seeking to improve low-speed and take-off/landing performance of the Su-7B fighter-bomber, in 1963 the Sukhoi OKB with input from TsAGI created a variable-sweep wing technology demonstrator. The Su-7IG (internal designation S-22I, NATO designation "Fitter-B"), converted from a production Su-7BM, had fixed inner portions of the wing with movable outer segments which could be swept to 28°, 45°, or 62°. A fixed inner wing simplified construction, allowing the manufacturer to retain the Su-7 landing gear and avoiding the need for complex pivoting underwing hardpoints, and it minimized the shift in the center of pressure relative to the center of mass with change in wing sweep. The new wing also had extensive leading-edge slats and trailing-edge flaps. Su-7IG first flew on 2 August 1966 with V. S. Ilyushin at the controls, becoming the first Soviet variable geometry aircraft. Testing revealed that take-off and landing speeds had decreased by 50–60 km/h (31–37 mph) compared to the conventional Su-7.
The production aircraft was named Su-17 (NATO designation "Fitter-C", factory designation S-32) and was unofficially dubbed Strizh (Стриж, martlet) in service. Aside from the new wing, it differed from its predecessor Su-7 in having a new canopy and a dorsal fuselage spine for additional fuel and avionics. The Su-17 first flew on 1 July 1969 with E. K. Kukushev at the controls.
A total of 2,867 Su-17 and its variants were built, of which 1,165 were exported to 15 nations.
Soviet Union/Russia
The Su-17 entered service with the Soviet Air Force in 1970. The aircraft was used by both the Soviets and the Afghanistan government forces during the Soviet invasion of Afghanistan. High-altitude airfields and hot dusty climate created special operational challenges. In the summer, the takeoff roll of the Su-17 increased 1.5-fold and landings frequently ended with burst tires and brake fires. Avionics failures were common due to heat and sand contamination.
However, the AL-21F engine proved tolerant of routine ingestion of sand and sand-contaminated fuel and by 1985 the combat readiness of the Su-17 fleet exceeded that of the Sukhoi Su-25 and the helicopters. The first-series Su-17s were quickly replaced with more capable Su-17M3 and Su-17M4. Despite its durability and payload, the aircraft proved ill-adapted for combat in the mountainous terrain due to high attack speeds, low maneuverability, and the need to stay out of range of anti-aircraft artillery due to lack of significant armor protection. Although external armor was added around the engine, hydraulics, and fuel systems based on damage analysis, this was still insufficient compared to dedicated close air support Su-25s.
The appearance of MANPADS such as the Soviet-made Strela 2 (smuggled from Egypt), and the American FIM-43 Redeye and later FIM-92 Stinger, presented a new threat and forced Su-17s to even higher operational altitudes. Revised tactics and retrofit of up to 12 flare dispensers which fired automatically during the attack run proved effective, and in 1985 only one Soviet Su-17 was lost to ground fire.
Forced to operate 3,500–4,000 m (11,500–13,000 ft) above ground, Su-17s shifted from using unguided rockets to bombs, including thermobaric weapons, while Su-25s were tasked with precision strikes. Toward the end of the war, the Su-17 force was partially replaced by the Mikoyan-Gurevich MiG-27s in order to perform operational testing of the new fighter-bomber.
The Su-17M3/4 were used during the First Chechen War alongside Sukhoi Su-24s and Sukhoi Su-25s in ground attack and reconnaissance missions.
In a move to eliminate single engine strike aircraft from its inventory, the Russian Air Force retired its last Su-17M4 along with its fleet of MiG-23/27s in 1998. Around 550 remain in service with other nations.
Angola
The Soviets supplied the communist government of Angola with 12 Su-20Ms in 1982 or 1983, which formed the basis of the 15th FS. The squadron suffered a swift loss of at least six aircraft – most in mishaps – by 1985, and three more by 1988, and had only two aircraft left when it was reinforced with another Soviet batch of 14 Su-22M-4Ks and two Su-22UM-3Ks in 1989–90 (incorporated into the 26th Air Regiment, based in Mocamedes). A second shipment from Belarus in 1999 consisted of 2 Su-22UBs and 4 Su-22Ms, and a third one from Slovakia in 1999-2001 consisted of 10 Su-22M-4s and one Su-22UM-3K.
These aircraft saw heavy use in the war against UNITA. From the aforementioned losses, which can not be classified as mishaps or combat attrition, only an Su-20M, serialled C510 was reportedly downed in 1987 and a better-documented case occurred on 6 November 1994 when an Su-22 based at Catumbela was shot down by a SAM fired by UNITA during a raid against Huambo. The pilot managed to eject and flee naked after stripping off his flight suit.
Iraq
From 22 September 1980 to 20 August 1988, during the Iran–Iraq War, Iraq used Su-17 export versions (Su-20 and Su-22) alongside older Su-7s. They were most used in ground attack and close air support role. In 1991, during the Gulf War, they saw limited active service because the Iraqi regime distrusted the Air Force.
Two Su-20/22 and one Su-7 were shot down by a USAF F-15C in the closing days of the campaign, when the IQAF was moving its aircraft to Iran. Many more were destroyed on the ground by coalition air forces or evacuated to Iran and they were never returned.
On 20 and 22 March, two other Su-20/22s were downed by a USAF F-15C during Operation Provide Comfort that started soon after the war.
During the Iran–Iraq war, Iranian F-14s shot down 21 Su-20/-22s, that have been confirmed by western sources. 18 Su-20/-22s were also shot down by Iranian McDonnell Douglas F-4 Phantom IIs. and three by Iranian Northrop F-5s.
Official Iraqi accounts show no loss of Su-20 aircraft throughout the war against the Kurds and Iran. 20 Su-22M2, two Su-22M3 and seven Su-22M4 were lost during the war with Iran, the majority to ground fire sustained during low level bombing raids against the Iranian front lines.
Libya
Two Libyan Su-22s were shot down in the Gulf of Sidra incident by U.S. Navy Grumman F-14 Tomcats on 19 August 1981. One Su-22 fired an AA-2 Atoll missile head-on at one of the F-14s from an estimated 300 meters closing distance. Both were then downed by AIM-9 Sidewinder missiles.
On 8 October 1987, in the aftermath of the Chadian–Libyan conflict, an Su-22MK was shot down by a FIM-92A fired by Chadian forces. The pilot, Capt. Diya al-Din, ejected and was captured. He was later granted political asylum by the French government. During the recovery operation, a Libyan MiG-23MS was shot down by a FIM-92A.
A Libyan Su-22 crashed near the city of Benghazi, Libya on 23 February 2011. The crew members, Captain Attia Abdel Salem al Abdali and his number two, Ali Omar Gaddafi, were ordered to bomb the city in response to the Libyan Civil War. They refused, bailing out of the aircraft and parachuting to the ground. Su-22s were heavily used by the Libyan loyalist forces against the insurgent forces from mid February up to mid March 2011, when the international mission started and the no fly zone was imposed. Among other missions, Su-22s also attacked Anti-Gaddafi positions on Bin Jawad in early March 2011 as government forces retook the town. Some Libyan Air Force Su-22s were claimed shot down by the rebels. One was destroyed on the ground by a Belgian Air Force F-16AM on 27 March. All other Libyan Air Force Su-22s, in flying conditions which were Su-22M3 version and trainers, were destroyed in the opening nights of the UN air raids in their shelters. In January 2015, it was reported that Libyan forces were trying to restore older Su-20 (S-32MK) air-frames, retired before the Libyan Civil War, to flying condition to push them back to service to use against opposing forces in the Libyan Civil War (2014–present).
Peru
Peru was the only Latin-American export customer of the type. On 24 April 1992, Peruvian "Fitters" attacked a U.S. Air Force Lockheed C-130H Hercules of the 310th Airlift Squadron which was intercepted at sea, west of Lima, injuring six of the 14 crew members. Crew member Joseph C. Beard, Jr., was killed, when he was sucked from the cabin at 18,500 feet, and crew member Ronald Hetzel sustained severe injuries, with his chest blown open and his jugular vein severed. The incident caused an almost year-long interruption to the US anti-drug Air Bridge Denial Program and the establishment of a Joint Air Operation Center at Howard Air Force Base in Panama.
During the 1995 Cenepa War between Peru and Ecuador, two Peruvian Sukhoi Su-22 were lost.
On 10 February 1995, two Ecuadorian Air Force Mirage F1JAs, piloted by Maj. R. Banderas and Capt. C. Uzcátegui, were directed over five targets approaching the disputed Cenepa valley. After making visual contact, the Mirages fired their missiles, claiming two Peruvian Su-22A Fitter F shot down, while a Kfir claimed a further A-37B Dragonfly. Peru, however, denied that the two Su-22A Fitter F were shot down by Mirages, stating that one was struck by Ecuadorian anti-aircraft artillery during a low flying ground-attack mission, and the second because of an engine fire.
The Su-22s flew 45 sorties into the combat zone. A 20-strong force of "Fitters" was also set up at El Pato as a retaliatory force should Ecuador decide to attack the coastal port.
Poland
On 19 August 2003, a Polish Air Force Su-22M4K was accidentally shot down by friendly fire during an exercise by a Polish 2K12 Kub battery. The aircraft was flying 21 km from the coast over the Baltic Sea near Ustka. The pilot ejected and was rescued after two hours in the water. He later died in a CASA C-295M crash on 23 January 2008. As of 2012, Poland is planning to replace its Su-22s with three squadrons of UAVs.
As of 2014 the Polish Air Force is planning to retain the Su-22s in service. The Air Force will either keep all of its planes for the next three years, or withdraw half of them use the remainder for the following decade. It is hoped that this decision will have a positive impact on Polish industry, as the WZL nr 2 repair facility in Bydgoszcz will maintain the remaining aircraft under contract to the Air Force. The decision will also allow the Air Force to retain the well-trained ground crews and pilots, currently operating the machines. The Poles consider the Su-22 easier to maintain and repair than the other main combat aircraft types currently in Polish service (mainly the MiG-29 and the F-16). They also suffer from fewer malfunctions and other problems (high, 70–75% non-error index). It is also the only plane in Polish inventory equipped for electronic intelligence, warfare, and support of ground systems. The Polish Air Force has retained a large stockpile of air-to-ground weapons for use with the Su-22. By some estimates, the cost of destroying these resources would be higher than the projected cost of continuing Su-22 operations.
Syria
The Syrian Air Force used Su-20/-22s to attack Israeli forces in the Yom Kippur War and 1982 Lebanon War. Several Su-20/-22s were shot down by Israeli Air Force.
During the Syrian civil war, since the second half of 2012, Syrian Air Force Su-22s have been involved in combat operations against the Syrian insurgents. Like other SyAAF fixed wing aircraft, videos showed Su-22s using unguided munitions, mostly general purpose bombs, cluster bombs and incendiary bombs and unguided rockets. Strike techniques were low to medium altitude flat bombing runs with pull up after ordnance delivery and use decoy flares for self-defense. A Syrian Air Force Su-22M3 was shot down close to Taqba Air Force Base on 25th July 2013. The pilot died in the crash.
Yemen
On 11 August 2009, Yemeni armed forces started Operation Scorched Earth in northern Yemen to fight the Shia insurgency. The Yemeni Air Force backed the army with air raids on rebel-held positions. On 5 October 2009, a Yemeni Su-22 crashed when it was flying in formation with another aircraft, on the way back from a mission. The rebels claimed they shot it down, while Yemeni armed forces said it crashed due to technical problems. Earlier on 2 October, the insurgents said they shot down a "MiG-21" while again the military insisted technical problems caused the crash. On 8 November, a third Yemeni fighter aircraft reported to be a Sukhoi was destroyed. Again the military claimed it crashed due to technical problems, while the rebels claimed they shot it down. The pilot ejected and was recovered by friendly forces.
The Yemeni Air force once again used Sukhoi aircraft during the Arab Spring uprising. On 28 September 2011, a Yemeni Air Force Su-22 was shot down by tribesmen opposed to the rule of President Saleh. The government confirmed that rebel tribesmen were responsible for the shoot-down, and that the jet's pilot had been captured. On February 19, 2013 a Yemen Su-22 on a training mission crashed for unknown reasons into Sana'a, killing 12. On May 13, 2013 a Yemen Su-22 on a training mission crashed in Sana'a, killing the pilot.
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