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FMA IA 58 Pucará

From Alfawiki
Fábrica Militar de Aviones
Company typeState-owned company
IndustryAerospace
Founded1927; 99 years ago (1927)
Headquarters
Córdoba
,
Argentina
ProductsAircraft, including IA 58 Pucará

The FMA IA 58 Pucará () is an Argentine ground-attack and counter-insurgency (COIN) aircraft produced by Fábrica Militar de Aviones. It is a low-wing, twin-turboprop, all-metal monoplane equipped with retractable landing gear, designed to operate from unprepared airstrips. The Pucará was actively deployed in combat during both the Falklands War and the Sri Lankan Civil War.

Development

The development of the AX-2 COIN aircraft commenced in August 1966 at the Argentine state factory DINFIA, aiming to fulfill the requirements of the Argentine Air Force. Engineer Ricardo Olmedo initially led the project, which was later overseen by Aníbal Dreidemie, also known for designing the IA-52 Guaraní II and IA-63 Pampa. The design concept featured a low-wing monoplane powered by two turboprop engines housed in wing nacelles, paired with a T-tail configuration. The first full-scale unpowered glider prototype took flight on 26 December 1967.

After successful glider trials, construction began on a powered prototype in September 1968, originally named FMA IA 58 Delfín before adopting the name Pucará. This prototype was equipped with two Garrett TPE331 engines. Earlier that year, DINFIA had been rebranded as Fábrica Militar de Aviones (FMA). The maiden flight of the first prototype occurred on 20 August 1969, followed by a second prototype powered by Turbomeca Astazou XVIG engines on 6 September 1970. The Astazou engine was ultimately selected for production, leading to a third production prototype in 1973. The initial production aircraft flew on 8 November 1974, with deliveries commencing in early 1976.

Three derivative projects stemmed from the IA-58 development: a stretched airframe featuring a pressurized cabin and Astafan turbofan engines intended for light transport and aerial photography; an observation and reconnaissance platform inspired by the A-10; and the IA-60, an advanced trainer and light attack aircraft powered by two Astafan engines with high wings and a T-tail. Although wind tunnel testing was conducted for these variants, they were ultimately abandoned to concentrate resources on the IA-63 Pampa program.

Design

The IA 58 Pucará is constructed predominantly from all-metal materials, mainly duralumin, featuring conventional cantilever low wings with an unswept design and seven degrees of dihedral on the outer wing panels. The trailing edges are fitted with slotted flaps. Its slim fuselage accommodates a tandem two-seat cockpit beneath an upward-opening clamshell canopy. The cockpit includes Martin-Baker Mk 6AP6A zero/zero ejection seats, dual flight controls, and offers excellent forward and side visibility. Aerodynamically clean, the Pucará achieves higher speeds than the American OV-10 Bronco COIN aircraft but lacks an internal cargo bay requested for that model.

Crew protection against ground fire is provided by armor plating around critical areas including the cockpit and engines. Propulsion is delivered by two Turbomeca Astazou engines driving three-bladed Ratier-Forest 23LF propellers that double as air brakes. Designed for operations from short and rough airfields, it features retractable tricycle landing gear with a single nosewheel and twin main wheels retracting into engine nacelles equipped with low-pressure tires suited for uneven terrain. The tall undercarriage legs ensure clearance for weapons mounted beneath the wings. Additionally, three JATO rockets can be attached under the fuselage to assist with extremely short takeoffs. Fuel storage includes two fuselage tanks and two self-sealing wing tanks totaling 1,260 liters. Hydraulic systems operate the landing gear, flaps, and brakes, utilizing spring suspension technology similar to that found on the Junkers Ju 88. A T-tail configuration further enhances takeoff performance.

Armament reflects designs reminiscent of World War II era aircraft: two Hispano 804 20 mm cannons are mounted below the cockpit with ammunition capacity of 270 rounds each; four fuselage-mounted Browning FN 7.62 mm machine guns carry 900 rounds each. The aircraft supports three external hardpoints capable of carrying bombs, rockets, or additional fuel tanks—one under-fuselage station rated for up to 1,000 kg and two wing stations rated at 500 kg each—allowing a maximum external payload of 1,620 kg. Targeting is facilitated through a basic reflector sight system integrated into the cockpit.

Operational history

The initial batch of aircraft was delivered to the Argentine Air Force (, FAA) in May 1975, equipping the 2° Squadron of the 3rd Air Brigade () based in Reconquista, located in northern Santa Fe. These aircraft entered operational service later that same year, executing counter-insurgency missions from Córdoba targeting Communist ERP guerrilla forces during Operativo Independencia in Tucumán Province.

1982 Falklands War

By the time of the Falklands conflict, approximately 60 Pucarás had been delivered. Due to their ability to operate on the limited airstrips available on the Falkland Islands—where FAA Skyhawks and Mirages could not be deployed—the decision was made to send Pucarás to the islands. Four aircraft reached Port Stanley on 2 April 1982, followed by an additional eight on 9 April. The remaining planes were stationed at Puerto Santa Cruz and Comodoro Rivadavia for coastal patrols and potential reinforcement duties.

The majority of combat Pucarás were equipped with unguided bombs, 2.75-inch rocket pods, or 7.62 mm machine gun pods. Operating from Port Stanley airport and makeshift grass runways at Goose Green and Pebble Island, they carried out reconnaissance and light attack operations.

On 1 May 1982, at Goose Green, three Pucarás were destroyed and one pilot killed by cluster bombs dropped by 800 NAS Sea Harriers. Subsequently, six more aircraft were destroyed during the SAS Raid on Pebble Island on 15 May.

On 21 May, one Pucará was shot down by a Stinger SAM, marking the first combat deployment of this missile system. Another was downed by Cmdr Nigel Ward's Royal Navy Sea Harrier following a successful two-aircraft strike against a British observation post. Despite sustaining over twenty cannon hits, the aircraft demonstrated notable durability; its pilot ejected safely and was recovered.

Two Pucarás recorded the only confirmed Argentine air-to-air kill by shooting down a Royal Marines Scout helicopter with machine gun fire on 28 May during the Battle of Goose Green. One of these aircraft crashed while returning to Port Stanley; its pilot survived and was later honored post-conflict.

Also on 28 May, troops from the British 2 Para unit shot down a Pucará using small arms fire after it launched rockets against their positions; the pilot was captured as a prisoner of war.

During the assault on Battle of Mount Longdon on 11 June, three Pucarás executed a coordinated attack against British artillery positions in conjunction with the Argentine Army's 3rd Artillery Group (GA3).

Captured aircraft

Following the Argentine capitulation, British forces seized eleven Pucarás (four still operational), with six being transported to the United Kingdom.

Sri Lankan Civil War

Due to restrictions imposed by traditional Western suppliers on military equipment, the Sri Lanka Air Force procured two Pucarás from Argentina for counter-insurgency roles. These were assigned to the No 1 Flying Training Wing at SLAF Anuradhapura, bearing serial numbers CA-601 and CA-602. After initial pilot training, these aircraft were utilized for advanced flight instruction and combat missions. In 1993, two additional units—CA-604 and CA-605—were added to the fleet.

The Pucarás demonstrated effectiveness because of their substantial payload capacity and appropriate cruising speed for close air support tasks. Although primarily based at SLAF Anuradhapura, they were occasionally deployed to forward locations such as SLAF Palaly, providing support to the Sri Lanka Army during operations including Operation Riviresa. The aircraft also undertook maritime patrol missions. Notably, CA-605 survived ground fire over the Kilaly lagoon and is currently displayed at the Sri Lanka Air Force Museum.

During heavy fighting in the Northern Province as part of Operation Leap Forward, CA-601 was shot down by a MANPADS in July 1995, resulting in the loss of its pilot. CA-604 was lost due to an accidental ordnance detonation during a night bombing mission; its pilot successfully ejected. Subsequently, CA-602 was retired in 1997 as helicopter gunships (Mil Mi-24) and later jet aircraft (Mikoyan MiG-27) took over close air support duties.

Operational constraints for the Pucará included absence of an oxygen system limiting operational altitude and lack of defensive countermeasures against SAMs, which reduced survivability in hostile environments.

Upgrades

During the Falklands conflict in May 1982, the Argentine Air Force and Navy outfitted the AX-04 prototype with pylons designed to carry Mark 13 torpedoes, aiming to transform it into a torpedo bomber to boost its anti-ship effectiveness. Test flights were conducted near Puerto Madryn and Golfo Nuevo; however, the cessation of hostilities halted the assessment process.

Throughout the 1980s, multiple fleet modernization programs—including the Pucará Charlie modification, Pucará 2000, and Pucará Bravo (for which 40 units were initially ordered but subsequently cancelled)—were discontinued due to insufficient financial resources.

The Uruguayan Air Force undertook fleet enhancements by integrating Litton LTN-211 and GPS omega navigation systems, structural adaptations for deploying Mk. 82 Snakeye bombs and 1000-litre external fuel tanks, as well as installing avionics such as the WX-500 Stormscope and LED Sandel SN3500 cockpit displays.

In 2007, an Argentine IA-58 was converted to operate on bio-jet fuel derived from soybeans under a government-supported initiative, making Argentina the second nation worldwide to fly an aircraft powered by biofuel. This effort aimed to decrease reliance on conventional fossil fuels within the FAA.

Beginning in 2009, extensive avionics modernization and airframe refurbishments commenced under a collaboration between the FAA and FAdeA, culminating in the IA-58D Pucará Delta variant. Cockpit instrumentation was standardized with that of the IA-63 Pampa Phase II, featuring upgraded communications equipment, distance measuring equipment (DME), emergency locator transmitter (ELT), identification friend or foe (IFF), GPS navigation, Electronic Attitude Director Indicator (EADI), Electronic Horizontal Situation Indicator (EHSI), radar warning receiver (RWR), heads-up display (HUD), DEFA 554 cannons, and a Pratt & Whitney Canada PT6A-62 engine generating 950 shp replacing the original Turbomeca Astazou. These improvements are intended to extend operational service through 2045. However, bureaucratic hurdles and economic constraints delayed full fleet modernization. Uruguay has shown interest in FAdeA’s maintenance, repair, and overhaul (MRO) program along with new engine installations.

By April 2016, FAdeA was actively upgrading twenty Argentine Pucarás; the initial prototype conducted its first flight in November 2015.

In 2019, Argentina phased out the Pucará from frontline light attack duties and repurposed it as the Pucará Fénix for border monitoring and surveillance missions. This version features Pratt & Whitney Canada PT-6A-62 engines equipped with four-bladed propellers, a pod-mounted Fixview EO/IR sensor turret, and enhanced data link systems. The Fénix model received authorization in December 2021 and is projected to remain in service for at least fifteen years.

Failed contracts

The Peruvian Air Force expressed interest in procuring up to twenty-five IA-58A aircraft slated for delivery in 1974.

Argentina's first international sale attempt occurred in February 1978 when the Islamic Air Force of Mauritania contracted for four IA-58A units along with training and support valued at $10.8 million USD, with an option for eight additional aircraft. Following the overthrow of President Moktar Ould Daddah, this agreement was cancelled. The completed aircraft were absorbed into Argentine Air Force service as A-515 through A-518, retaining their desert camouflage scheme.

In March 1983, negotiations with the Central African Republic Air Force for two Pucarás at $9.5 million USD were terminated.

A September 1983 deal worth $110 million USD for twenty-four IA-58A equipped with Garrett turboprop engines for the Venezuelan Air Force was also cancelled. Venezuela subsequently acquired OV-10A Broncos from United States Air Force surplus stocks via credit arrangements.

Political complications led to the cancellation of a March 1985 contract with the Iraqi Air Force for twenty IA-58A aircraft plus options for an additional twenty valued at $76 million USD.

In May 1986, although the Bolivian Air Force requested twelve IA-58A aircraft priced at $52 million USD, no orders were finalized.

Between 1987 and 1988, Iran negotiated agreements totaling over $440 million USD for one hundred ten IA-58A units; however, no firm orders materialized.

An agreement reached in November 1987 with the Force Aérienne Zairoise for six Pucarás valued at $26.7 million USD was subsequently cancelled.

In 1990, Brazil announced plans to acquire thirty IA-58A aircraft as part of its SIVAM program but later cancelled this procurement due to development focus shifting toward the Embraer EMB 314 Super Tucano.

Finally, in 1991 negotiations with the Paraguayan Air Force regarding four IA-58A aircraft valued at $10.6 million USD did not result in a purchase.

Variants

  • AX-02 Delfín: Experimental prototype model.
  • AX-04: Prototype equipped to carry torpedoes.
  • IA-58A Pucará: Primary production model featuring two seats, designed for counter-insurgency and close air support missions; planned for retirement in September 2019.
  • IA-58B Pucará Bravo: Altered two-seat version with an extended forward fuselage allowing substitution of the 20 mm cannon with a pair of 30 mm DEFA cannons and upgraded avionics; one prototype converted from the IA-58A.
  • IA-58C Pucará Charlie: Single-seat configuration developed after the Falklands War to enhance anti-shipping and anti-helicopter capabilities; incorporated additional weaponry and electronic warfare equipment; the prototype flew in 1985, but further conversions were halted due to budget constraints.
  • IA-58D Pucará Delta: Modernization initiative aimed at upgrading IA-58A airframes with advanced avionics and Pratt & Whitney PT6A-62 engines; project resumed in June 2019 with certification anticipated shortly thereafter.
  • IA-66: Modified IA-58A fitted with two Garrett TPE331 turboprop engines; only one prototype was flown in 1980.
  • IA-58 Pucará Fénix: Conversion program initiated after 2019 to repurpose retired counterinsurgency aircraft for border surveillance and patrol duties; approved in December 2021, with an expected service lifespan exceeding 15 years.

Current operators

  • "Fénix" prototype under testing since 2019, with production authorized in 2021.

Former operators

  • Sri Lanka Air Force (active from 1993 to 1999, losing two aircraft in combat and retiring two others)
  • Royal Air Force (assessed a captured Pucará following the Falklands conflict; currently exhibited at the RAF Museum Cosford)

Argentina

Sri Lanka

United Kingdom

Bibliography

External links

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