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Aermacchi MB-326
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The Aermacchi or Macchi MB-326 is a light military jet trainer designed and produced by the Italian aircraft manufacturer Aermacchi. It is one of the most commercially successful aircraft of its type, being bought by more than 10 countries and produced under licence in Australia, Brazil and South Africa.
Key Information
The MB-326 was developed during a period when "all-through" jet training was considered by many air forces to be the most cost-effective model for training of military pilots. Accordingly, Aermacchi designed it as a single type of aircraft that could readily perform both elementary and advanced training right through to a near combat-ready standard. After it was proposed during the 1950s, the Italian Air Force (AMI) quickly became interested in the MB-326, and an initial contract to produce three prototypes was issued following a competition. Several design refinements were made prior to the AMI, giving its official approval of the project during 1956. On 10 December 1957, the first prototype performed its maiden flight. On 15 December 1958, the Italian government ordered 15 pre-series aircraft; further orders soon followed.
During February 1962, the MB-326 formally entered service with the AMI. Operational experience with the type demonstrated that the advantages of operating just one type for all training purposes, being simplicity and economy of scale, were usually outweighed by the disadvantages, namely the higher purchase and operating costs of a large all-jet training fleet. Many operators therefore soon switched to operating the MB-326 in conjunction with a cheaper piston-engined type for basic training purposes. Over time, the MB-326 found its primary role as a lead-in trainer to prepare pilots for transition to very high performance fighter aircraft. It set many category records, including an altitude record of 56,807 ft (17,315 m) on 18 March 1966. While the majority of operators were military, some civil organisations also flew the type; Italy's national flag carrier Alitalia conducted pilot training using a handful of MB-326s.
In excess of 800 MB-326s were built between 1961 and 1975.[2] Brazil was the biggest export customer for the MB-326, which included its produced under license by Embraer. Licensed production of the type was also performed by Atlas Aircraft Corporation of South Africa. While the MB-326 had been originally conceived as a two-seat trainer, multiple single and two-seat light attack versions were also developed. Armed MB-326 saw combat, the South African Defence Force opting to employ the type during the South African Border War against the People's Armed Forces for the Liberation of Angola (FAPLA) and Cuban expeditionary troops in Angola between 1975 and 1989.
Development
[edit]Origins
[edit]During the 1950s, a number of countries began to operate compact jet-powered trainer aircraft that possessed similar performance to frontline operational aircraft, often having been produced as two-seat adaptions of these aircraft. Recognising the potential to better fulfil this role, several different companies independently chose to commence the development of purpose-built aircraft to serve as trainers; these included the French Fouga Magister, the American Cessna T-37 Tweet, the British Jet Provost, and the Czechoslovak Aero L-29. In the aftermath of the devastating Second World War, Italy spent a number of years recuperating and reestablishing its economy; as such, the nation found itself unable to prioritise the necessary financing for the independent development of high-end combat aircraft that would be competitive with the upcoming generation of supersonic interceptors or bombers; accordingly, Italian aviation company Aermacchi elected to instead focus its resources and development efforts upon the production of a line of light fighters and trainer aircraft.
What would become the MB-326 had its origins in a private venture project by Macchi; it was developed by a team headed by Italian aeronautical engineer Ermanno Bazzocchi, the company's technical director and chief engineer.[3] Reportedly, Bazzocchi had considered many different configurations for the tentative trainer before the design team chose to proceed with a single-engined design. In accordance with its intended primary use, the airframe was a robust and light all-metal structure, being relatively simple and cheap to construct and to maintain. The design was also to be powered by the British Armstrong Siddeley Viper turbojet engine, an efficient powerplant for the time.[3] The Viper engine had been originally designed as a short-life unit destined for use upon disposable target drones, however, the engine had shown itself to be far more reliable and useful in other roles. During 1954, initial representations by Bazzocchi were made to the Italian Air Ministry.[3] During 1953, the designed airframe and engine combination led to Macchi formally launching the MB-326 programme.
Around the time of the programme's launch, the Italian Air Force took interest in the proposed aircraft. The service was considering options for the potential replacement of its existing trainer fleet, thus, upon the commissioning of a competition to select a suitable successor, the MB-326 was an obvious early entrant.[4] A detailed specification was released for the competition, the requirements stated included a maximum load of 7 g when flown at the maximum weight, a lifespan of 5,000 flight hours, an interval of at least 50–60 hours between servicing, ample warning in advance of stalls (to be at least 15 km/h (9 mph) above the aircraft's stall speed), the ability to take-off at maximum weight in 800 m (2,625 ft) over a 15 m (50 ft) high obstacle (or 500 m (1,640 ft) when flown at a light weight), being able to land within 450 m (1,480 ft) at minimum weight, a minimum speed of 110/130 km/h and a maximum speed of 700 km/h, a rate of climb at least 15 m/s (2,950 ft/min), and an endurance time of at least three hours at 3,000 m (9,840 ft).[4]
Interest in the proposed MB-326 led to the award of the development contract for three prototypes.[3] The programme was subject to significant refinement around this stage, leading to several modifications being made. Amongst these changes was the elimination of the negative dihedral angle previously present on the horizontal tail surfaces and the substitution of a pair of wing-based airbrakes into one located at a ventral position. During 1956, the AMI gave its official approval of the project and issued a request for the production of a pair of prototypes (later designated as MM.571 and MM.572) as well as a single airframe for static tests. These prototypes were not intended to include several features, such as the ability to equip and deploy armaments or refinements such as cabin pressurization, however, Bazzocchi chose to introduce them regardless.
Into flight
[edit]On 10 December 1957, the first prototype performed its maiden flight, flown by Macchi's chief test pilot Guido Carestiato.[3][5] This prototype, designated as I-MAKI, was first publicly demonstrated over France. During its flight test programme, the MB-326 prototypes demonstrated highly favourable flight characteristics of the design; however, several of the modifications made had negatively affected the overall weight of the aircraft; allegedly, at one stage, the excess weight was 400 kg (880 lb) greater than that given in the initial estimates. The original Viper 8 engine was capable of producing 7.8 kN (1,750 lbf) of thrust;[3] to address the increased weight, the more powerful Viper 9 model was adopted instead, which was capable of generating 0.7 kN (147 lbf) more thrust.
On 22 September 1958, the first prototype was joined by the similarly configured second prototype.[6] It did feature some differences from the earlier aircraft; chiefly, it was powered by a newer model of the Viper engine, the Viper 11, which had been rated to produce 11.1 kN thrust (1,134 kgf, 2,500 lbf). The Viper 11 would be the same standard of engine used on subsequent production standard aircraft.[3] Direct competition to the MB-326 came in the form of the Fiat G.80; this aircraft was both more powerful and was the first real Italian jet, having flown five years earlier. However, the G.80 had several disadvantages, including being heavier, considerably larger and more expensive than its rival; as such, it ultimately lost the trainer contest and remained without a market.
On 15 December 1958, having been suitably impressed, the Italian government placed an order for a batch of 15 pre-series examples on behalf of the AMI.[3] A production line was established at Macchi's facility in Masnago, Varese, Northern Italy. Shortly thereafter, the AMI issued its first order for the MB-326 for an initial group of 50 production standard aircraft.[3] During 1960, a larger follow-on order for 100 aircraft was received by Macchi; this sizable commitment was viewed as being a major step towards establishing the company's supremacy in jet trainer market.
Design
[edit]
The Aermacchi MB-326 was a low-wing monoplane with an all-metal structure composed of light alloys. It was one of the first jet trainers to be developed with the aim of catering to both for ab initio and advanced instruction.[3] As originally developed, the MB-326 functioned as a refined but simple aircraft capable of covering the considerably wide range of performance characteristics required to cover both ab initio training and advanced instruction alike; other major characteristics of the type included the capacity to deliver a high rate of utilization in conjunction with minimised servicing and maintenance requirements.[7] According to Flight International, the type was suitable for the teaching of the majority of advanced flying techniques. In addition to being relatively easy to fly, a high degree of safety was also intentionally built into it, including adoption of new Martin-Baker-built ejection seats.[8]
The MB-326 was powered by a single Rolls-Royce Viper non-afterburning turbojet engine, initial production aircraft were powered by the Viper 11 model, capable of generating up to 2,500 lb of thrust.[3] The engine possessed multiple favourable attributes, including its general simplicity and robustness, relatively low revolutions per minute (RPM) and turbine entry temperature (TET), rapid acceleration, ease of installation, and its somewhat forgiving nature to mishandling in the air by students.[9] Air was provided to the engine via a pair of low-profile intakes set into the wing roots. The Viper was produced under licence by Italian aviation company Piaggio following an agreement established with its original manufacturer, the British engine firm Bristol Siddeley, during 1959.[3]
In a structural perspective, the MB-326 was relatively straightforward.[8] Both the fuselage and the wing were constructed in three sections; of these, the centre section of the wing was integral to the fuselage. The fuselage was divided into a forward, central, and rear section; the forward section contained the nose wheel and radio systems; the centre part, accommodated the cockpit, fuel tanks and the engine; and the rear section which comprised both the tail unit and jet pipe.[8] The fuel system had one large tank in the middle-fuselage and two in the wingtips; a single-point pressure-fuelling system is located on the starboard side of the aircraft to provide a total refuelling time of around five minutes.[8] The rear of each wing had flaps, and ailerons with a trim surface; each wing had 22 ribs and two spars. Wing fences were added mid-wing to increase the lift characteristics. Accordingly, the MB-326 was readily capable of performing relatively slow speed take-off and landing while retaining an excellent rate of climb.[10]
The MB-326 was outfitted with a tandem cockpit configuration, this arrangement had been chosen to result in a slimmer and more aerodynamically efficient fuselage in comparison to the more usual side-by-side arrangement. It was covered by a bubble canopy for excellent external visibility; it featured a windscreen anti-icing system powered by the engine compressor using bleed air.[8] The cockpit was also pressurised, enabling the MB-326 to conduct high-altitude flight. The ability to fly at higher altitudes was favourable for multiple purposes, including during the execution of aerobatic and navigational training, as well as improving fuel efficiency for long-distance flights.[8] The onboard systems were typically pre-manufactured units which were easy both to access and to remove; several elements were also intentionally interchangeable.[8] The exterior of the aircraft was covered by a total of 80 inspection panels and doors; in-situ engine inspection could be performed via a pair of large access panels set above and below the engine bay while another pair of doors allowed access to the intake duct's interior for the inspection of the first-stage compressor rotor blades.[8]
Operational history
[edit]Italy
[edit]
The MB-326 was one of the last Italian aircraft to hold the distinction of breaking multiple world records. Perhaps the most notable of these occurred during August 1961, when pilot Guido Carestiano set the C1D group 1 category altitude record of 15,489 meters. The record-breaking flights also provided publicity for the MB-326. In particular, one pilot, Massimo Ralli, was responsible for the establishment of several different records while flying the type:
- 8 February 1966, climbing records: 2 min 2 sec to 3,000 m, 3 min 56 sec to 6,000 m, 6 min 39 sec to 9,000 m, and 12,000 m in 10 min 53 sec.
- 18 March 1966, 15,690 m altitude record in horizontal flight, and 17,315 m with a launched climb.
- 18 July 1966, endurance record, with 970 km
- 2 August 1966, speed record over a 3 km straight: 871 km/h
- December 1966: speed of 880.586 km/h over 15–25 km, 831.007 km/h over 100 km, 777.667 km/h over 500 km, and another endurance record at 777.557 km
These high-profile successes functioned as objective statements of the capable performance of the MB-326 and established the type as being one of the best aircraft amongst its contemporaries in its category. Another pilot Riccardo Peracchi, who was employed by for AMI, frequently demonstrated the manoeuvrability and controllability of the aircraft at airshows for a number of years. While Peracchi displayed the MB-326's agility, Ralli concentrated on exploring its cutting-edge performance; meanwhile, early customers of the aircraft were typically reporting their satisfaction with the type to Macchi.[4]
The first production MB-326s, following a relatively protracted development cycle, were first delivered to the Lecce-Galatina school of the AMI's 214° Group, these were temporarily fielded at Brindisi, Apulia.[3] On 22 March 1962, the MB-326 formally entered squadron service with 43° Flyer course. The type was soon used to replace the aging North American T-6 Texan; typically, within the space of 130 hours, pilots would be as prepared to graduate as they would have been after receiving 210 hours training in the older T-6.[11][12]
As a trainer, the MB-326 was considerably costlier but was met with enthusiasm amongst students; additionally, when used in combination with the Fiat G.91T advanced trainer, it enabled the enactment of an "entirely-jet" training course for AMI pilots, and moreover these were domestically designed and produced aircraft. According to aerospace publication Flight International, during the early 1960s, the AMI's flight training programme was heavily influenced by the impending entry into service of the Lockheed F-104G Starfighter.[3]
As well as being amongst the first customers to procure the aircraft, the AMI would be amongst the final customers of the later-built models of the MB-326 as well. The service ordered a batch of 12 MB-326E, comprising six MB-326 updated to MB-326G, and six newly produced (MM.54384/389). They had provisions for armament, but the engine was the Viper 11 Mk 200 and not the Viper 20 Mk 540.[4] In Italian service, the MB-326 was replaced by the MB-339 between 1981 and 1984, acting after that as fast linkage aircraft, replacing the old T-33s that were slightly faster. Unusually, the MB-326 did not see service with the Frecce Tricolori aerobatic team, who kept their faster G.91PANs (they were later replaced by MB-339s).
In addition to its AMI service, the MB-326 was also employed in a civilian capacity within Italy. National flag carrier Alitalia placed an order for four trainer-configured aircraft, designated as the "D" version; these were expressly demilitarized and equipped with specialised instrumentation in order to train the airliner's pilots in preparation for the arrival of the new generation of jetliners that were being procured by the airliner.
Neither the "A" and "C" models of the MB-326 would ever be realized. The "A" variant had been intended to be operated as a light attack aircraft, armed with a pair of 7.62 mm machine guns which were to be installed upon the aircraft's nose. While none were originally built, a number of MB-326s were later referred to by the "A" designation, however, this was meant to indicate that these had been provisioned with a Marconi-built AD-370 automatic direction finder (ADF). The "C" version was envisioned as being provisioned with a nose-mounted North American Search And Ranging Radar (NASARR) unit and other electronic equipment in order to be used for the training of AMI F-104 pilots,[7] however, this variant only appeared as a mock-up.
Australia
[edit]
The Royal Australian Air Force (RAAF) used the MB-326H as a jet trainer. A total of 97 were ordered: 12 were delivered by Macchi, 18 assembled from kits in Australia, and another 67 were built by the Commonwealth Aircraft Corporation and Hawker Aircraft with the designation CA-30.[13] They were essentially similar to the MB-326G but with improved avionics. The RAAF's aerobatic team, The Roulettes, flew the MB-326H from December 1970 until 1989. RAAF pilot training until 1975 consisted of 60 hours pre-selection on CAC Winjeels (from 1975 onwards the PAC CT/4 Airtrainer), 150 hours medium training and another 75 hours advanced training on MB-326H. Pilots selected for combat aircraft then progressed to the Mirage IIIOD.
Although well-suited to its task and widely liked for its excellent handling, the service career of the MB-326 was cut short because of structural fatigue problems. The Australian fleet, for example, had a life-of-type extension program in the 1980s, and were then re-winged in the early 1990s after a fatigue-related crash. Even so, the MB-326 was supplemented by new Pilatus PC-9 trainers to reduce the flying hours being accumulated by the MB-326. The last examples of the MB-326 were withdrawn by 2001 and replaced by the Hawk 127.[14]
Brazil
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Brazil was the main customer for the MB-326, in 1970 ordering two prototypes and 166 MB-326GCs, called the AT-26 Xavante. It was produced under license by Embraer with a further six for Togo and 10 for Paraguay.
The aircraft was important also for two developments: from the MB.326K the MB.326L was produced, this was the direct ancestor of the Aermacchi MB.339. With license-building in Brazil, the MB.326 opened the field to further collaborations, leading to the AMX. Neither the MB.339 nor the AMX were as successful as the MB.326, but this machine was capable of further steps in technology and commerce.
South Africa
[edit]South Africa obtained a license to produce the MB-326M (similar to the 'G' model), as the Impala Mk I in 1964 with production starting in 1966.[15] It received 40 Italian-built aircraft followed by about 125 built locally by the Atlas Aircraft Corporation,[16] using them both as trainers and in an armed configuration. Seven examples of the MB-326K were also bought as light attack aircraft, with a further 15 assembled from kits,[17] while around 78 were license-produced and known as the Impala Mk II.[4] Licence production of the single seat version began in 1974.[15] The Impala Mk II, locally manufactured and equipped with French armament, was also advanced with a South African ECM suite.

The South African Defence Force employed Impalas during campaigns against the People's Armed Forces for the Liberation of Angola (FAPLA) and Cuban expeditionary troops in Angola between 1975 and 1989. Impala pilots typically flew at 550–650 km/h at a height of 15 m to avoid Angolan air defences. Over the course of the South African Border War, one was downed by an SA-7; another returned with an unexploded missile in its exhaust.[18]
The aircraft had many advantages over expensive supersonic jets. Although slower, it could operate from relatively primitive airfields and strike swiftly. The South African Air Force (SAAF) used up to 6 x 120 kg or 4 x 250 kg bombs. The main armament consisted of 68 mm SNEB rocket-launchers (four x 6 or two x 18), and two 30 mm autocannon (with 300 rounds).[19] These cannons were the real bonus for the Impala Mk II, helping to give a superior performance compared to earlier two-seat versions. The latter could also carry a pair of 30 mm DEFA guns in under-wing pods. However, dual capability as trainer-attackers was better appreciated, as was the availability of six hard points and so dual-seat versions were far more common. Six squadrons were equipped with the Impala Mk II in the SAAF during the 1970s and 1980s. Prior to Operation Moduler, most Impalas were withdrawn from their operating bases in South-West Africa, leaving the work to Mirage IIIs and Blackburn Buccaneers.[20]
Impala Mk IIs were also opportunistically used as interceptors. In several encounters in 1985 with Mi-8 and Mi-24 helicopters, they shot down a total of six. This happened during a crucial phase of the ground war, when Angolan and Cuban troops were checked in an offensive against UNITA bases. This ended in disaster for the Angolan/Cuban alliance when their supplies were cut off by UNITA and the SAAF and front line troops ran out of ammunition. Helicopters were being used to supply the besieged troops and the SAAF cut off this link. Two Mi-24s were shot down in the first encounter while escorting Mi-17s.[21] The MiG-21s that escorted them flew too high to react in time. Two days later the Impala Mk IIs struck again, downing two Mi-24s and two Mi-17s. Attacks on unsuspecting helicopters were carried out with only two guns per aircraft. The single seat Impala Mk IIs were also sometimes armed with Matra R550 Magic air-to-air missiles for self-defence.[15] The Impala Mk II operated at extreme ranges and had to fly very low, climbing only when helicopters were seen at medium altitude. After each attack they returned to low level to avoid interception by enemy MiGs.
The Silver Falcons, the SAAF aerobatic team, were equipped before with Impala Mk Is.
The flying school for Impalas was Flying Training School at Langebaanweg while operational squadrons were 4, 5, 6, 7 and 8 Squadrons, with 85 Combat Flying School also having a small number of Impalas to supplement their Mirage trainers.[15]
Argentina
[edit]
A number of MB-326 aircraft, together with the more modern MB-339, formed the equipment of the Argentine Navy's 1 Escuadrilla de Ataque in 1982, when Argentina invaded the Falkland Islands. A number of MB-326s were deployed to bases along the Argentine coast immediately following the Argentine invasion, but soon returned to the squadron's base at Punta Indio. While several MB-339s were deployed to the Falklands, the MB-326s remained on the mainland.[22] After the end of the war, 11 EMB-326GBs were received from Brazil to replace losses and restore 1 Escuadrilla de Ataque's strength.[23]
Other operators
[edit]In stark contrast to the competing Fiat G.91, which was often considered to be not very convincing as a light fighter, the MB-326 was quick to achieve several export successes in this capacity. The type had ultimately failed to impress other NATO nations, who only sparsely adopted it into their air forces. However, the MB-326 did achieve a visible measure of success amongst many Third World countries, leading to the MB-326 seeing considerable use as a front-line combat aircraft in a number of regional conflicts.
Eight MB-326Bs were ordered by Tunisia in 1965. These were developed from basic MB-326s with a weapons capability, with the 37th series AMI aircraft being converted (it had civilian markings I-MAKC). The main innovation was its ground attack capability, with six underwing pylons, holding a maximum of 907 kg of stores. In the same year, Ghana ordered nine similar MB-326Fs.[citation needed]
Other MB-326Gs used the Viper Mk 20 engine which provided 1,524 kg of thrust, and were consequently faster and had an increased payload of 1,814 kg max. Argentina ordered eight, initially as the MB-326K, later called the MB-326GB.[citation needed]
Another 17 MB-326GCs were built in Italy for Zaire (Force Arienne Zairoise) and 23 for the Zambian Air Force.
The MB-326K (originally known as the MB-336) was the last generation model, fitted with the Viper Mk 600 engine, capable of 1,814 kg thrust to give an even better performance. The first flight took place on 22 August 1970. The two prototypes were I-AMKK and I-KMAK, the MB-326G was converted to this new model.
Dubai bought three in 1974, and a further three in 1978 (MB-326KD), Tunisia eight (MB-326KT), Ghana nine (MB-326KB) and Zaire eight (MB-326KB).
The MB-326L was essentially the MB-326K with two seats. Two MB-326LD were supplied to Dubai and four MB-326LD to Tunisia.
The measures to save costs led the MB-326 to be frequently substituted for by propeller-driven models, however, the Macchi was often flexible enough to act as a medium trainer and light attack aircraft.
Variants
[edit]

- MB-326: Two prototypes and 125 production training aircraft for the Italian Air Force.
- MB-326A: Proposed armed version for weapons training, not built.
- MB-326B: Eight two-seat jet trainer, light attack aircraft for Tunisia.
- MB-326D: Four two-seat unarmed jet trainers for Alitalia.
- MB-326E: Six two-seat armed jet trainers for the Italian Air Force.
- MB-326F: Nine two-seat jet trainer, light attack aircraft for Ghana.
- MB-326G: Two two-seat jet trainer, ground-attack aircraft.
- MB-326GB: Two-seat jet trainer, ground-attack aircraft. Eight were sold to the Argentine Navy. 17 aircraft were exported to Zaire, and another 23 aircraft to Zambia.
- MB-326GC: Two-seat jet trainer, ground-attack aircraft for the Brazilian Air Force. 167 aircraft built under license in Brazil as the Embraer EMB-326 for the Brazilian Air Force. Eleven of them were transferred to the Argentine Navy after the Falklands War. Six aircraft were exported to Togo, and another ten to Paraguay. Total production, 182.
- AT-26 Xavante: Brazilian Air Force designation of the MB-326GC.
- RT-26 Xavante: Some AT-26 Xavantes were converted into reconnaissance aircraft.
- MB-326H: 87 two-seat jet trainers built for the Royal Australian Air Force, and 10 for the Royal Australian Navy. Twelve Italian-built aircraft and 85 built under license in Australia by the Commonwealth Aircraft Corporation with the designation "CA-30".
- MB-326K: Single-seat ground-attack aircraft for the South African Air Force. Built under license in South Africa by the Atlas Aircraft Corporation.
- Impala Mk II: South African Air Force designation of the MB-326K.
- MB-326KB: Single-seat ground-attack aircraft for Zaire. (Six built).
- MB-326KD: Single-seat ground-attack aircraft for Dubai. (Three built).
- MB-326KG: Single-seat ground-attack aircraft for Ghana. (Four built).
- MB-326KT: Single-seat ground-attack aircraft for Tunisia. (Seven built).
- MB-326L: Two-seat advanced jet trainer aircraft.
- MB-326LD: Two-seat advanced jet training aircraft for Dubai. (Two built).
- MB-326LT: Two-seat advanced jet training aircraft for Tunisia. Four built.
- MB-326M: Two-seat jet trainer, ground-attack aircraft for the South African Air Force. Built under license in South Africa by the Atlas Aircraft Corporation.
- Impala Mk I: South African Air Force designation of the MB-326M.
- MB-326RM: Five Italian Air Force MB-326s were converted into ECM aircraft.
Operators
[edit]
- Argentine Navy – The Argentine Naval Aviation received 8 MB-326GB plus 11 MB-326GC ex-Brazilian Air Force
- Royal Australian Air Force operated 87 MB-326Hs from 1967 to 2001. As of 2014 some fuselages are still in use at RAAF Base Wagga as training aids.
- No. 25 Squadron RAAF
- No. 76 Squadron RAAF
- No. 77 Squadron RAAF
- No. 79 Squadron RAAF
- No. 2 Flying Training School RAAF
- No. 2 Operational Conversion Unit RAAF
- No. 5 Operational Training Unit RAAF
- Central Flying School RAAF
- Roulettes
- Telstars
- Aircraft Research and Development Unit
- RAAF School of Technical Training (still in use as training aids)
- Fleet Air Arm (RAN) operated 10 MB-326Hs from 1970 to 1983.
- No. 724 Squadron RAN
- Brazilian Air Force received 182 MB-326GCs (known as the AT-26 Xavante) and 12 Atlas Impala ex-South African Air Force. The last examples were retired on 2 December 2010.[24]

- Cameroon Air Force: Six ex-SAAF Impala Mk I and IIs[25]
- Dubai Defence Force Air Wing – 6 MB 326KD, 3 MB 326LD[26] passed on to the United Arab Emirates Air Force in 1999.

- Ghana Air Force received 15 MB.326s.
- Alitalia operated 4 MB-326D as trainer
- Italian Air Force operated 135 MB-326 and two MB-326G for evaluation test[12]
- Paraguayan Air Force operates ten EMB-326GBs/AT-26 Xavante, some in reserve.
- South African Air Force operated 62 MB-326s plus 125 Impala Mk.1s and 73 Mk.2s
- Togolese Air Force received six MB-326GCs.
- Tunisian Air Force received 16 MB-326s.
- United Arab Emirates Air Force inherited six aircraft from the Dubai Defence Force Air Wing.
- Zaire Air Force received 25 MB-326GBs.
- Zambian Air Force received 23 MB-326GB. Retired by end of 2025.[36]
Accidents and losses
[edit]- 6 December 1990: An MB-326 of the Italian Air force crashed into a school classroom at Casalecchio di Reno near Bologna, Italy, killing 12 students and injuring 88 other students and staff. The aircraft had been abandoned minutes earlier by its pilot, who ejected following an on-board fire and loss of control.[37]
- 2 October 1993: An MB-326M Impala of the South African Air Forces's Silver Falcons aerobatic team crashed following structural failure of the right wing during a performance at the Lanseria Airshow near Johannesburg, South Africa. The pilot ejected but was killed.[38]
- 22 March 2025: An MB-326M Impala, ZU-IMP, crashed during a performance at the West Coast Airshow held at the Saldanha Vredenburg Municipal Airport (FASD), Saldanha Bay, West Cape, South Africa.[39][unreliable source?][40]
Aircraft on display
[edit]- Argentina

- 0647 – MB-326GB on static display at Río Grande, Tierra del Fuego.[41]
- Australia

- A7-001 – MB-326H on static display at the RAAF Museum in Point Cook, Victoria.[42]
- A7-014 – MB-326H on static display at the Gippsland Armed Forces Museum in Sale, Victoria.[43]
- A7-015 – MB-326H on static display at the Gippsland Armed Forces Museum in Sale, Victoria.[43]
- A7-026 – MB-326H on static display at the South Australian Aviation Museum in Port Adelaide, South Australia.[44]
- A7-027 – MB-326H on static display at RAAF Base Pearce in Bullsbrook, Western Australia.[45]
- A7-030 – MB-326H in storage at the Historical Aircraft Restoration Society in Albion Park Rail, New South Wales.[43]
- A7-047 – MB-326H at the RAAF Base Amberley Aviation Heritage Centre in Ipswich, Queensland.[43]
- A7-054 – MB-326H on static display at the Benalla Aviation Museum in Benalla, Victoria.[46]
- A7-057 – MB-326H on static display at the Merredin Military Museum in Merredin, Western Australia.[47]
- A7-062 – MB-326H on static display at Fighter World at RAAF Base Williamtown, Williamtown, New South Wales.[48]
- A7-066 – MB-326H on static display at the Aviation Heritage Museum in Bull Creek, Western Australia. It is painted as A7-025.[49]
- A7-067 – MB-326H forward fuselage on static display at Fighter World at RAAF Base Williamtown, New South Wales.[43]
- A7-072 – MB-326H on static display, Queensland Air Museum, Caloundra, Sunshine Coast. <QAM>
- A7-077 – MB-326H on static display at the Fleet Air Arm Museum at HMAS Albatross, Nowra, New South Wales.[50]
- A7-097 – MB-326H at the RAAF Museum in Point Cook, Victoria.[51]
- Austria
- 472 – MB-326M on display at the Österreichisches Luftfahrtmuseum Graz-Thalerhof in Graz, Styria.[52]
- Brazil
- FAB-4480, an AT-26 Xavante (Brazilian version of Aermacchi MB-326, built by Embraer) on static display in the public entrance of the Barreira do Inferno Launch Center in Parnamirim, Rio Grande do Norte.[53]
- FAB-4488, an AT-26 Xavante on static display in the military area of the Gov. Carlos Wilson Airport in Fernando de Noronha, Pernambuco.[53]
- FAB-4535, an AT-26 Xavante on static display in the entrance of the CINDACTA III building in Recife, Pernambuco.[53]
- FAB-4548, an AT-26 Xavante on static display in the entrance of the Hospital da Aeronáutica do Recife (Brazilian Air Force Hospital in Recife).[53]
- FAB-4556, an AT-26 Xavante on static display in the parking lot of the Colégio Militar do Recife, a military-managed high school in Recife, Pernambuco .[53]
- FAB-4560, an AT-26 Xavante on static display at Jardim Vila Galvão square, in the city of Guarulhos.[54]
- FAB-4566, an AT-26 Xavante in storage at the TAM Museum in São Carlos, São Paulo.[53]
- FAB-4590, an AT-26 Xavante on display at Espaço Ciência, a free admission science museum in Olinda, Pernambuco. The original painting of this aircraft has been replaced by a Romero Britto-styled livery.[55][56]
- FAB-4635, an AT-26A Xavante on static display near lake Joao Barbosa Sitônio in Triunfo, Pernambuco.[53]
- Italy


- MM54245 - MB-326E identification code 37–31, with the emblem of the 41º Stormo on the drift fin. On static display on the roundabout between via Santa Maria Goretti, via San Giuseppe la Rena and via Tiro a Segno in Catania, Sicily, near the Catania-Fontanarossa Airport.
- MM54243 – MB-326 on static display at the San Pelagio Air and Space Museum in Due Carrare, Veneto.[57]
- MM54266 – MB-326D on static display at the Istituto Tecnico Industriale Aeronautico in Udine, Friuli-Venezia Giulia.[58]
- South Africa
- 494 – MB-326M on static display at Impala Primary School in Kempton Park, Gauteng.[59]
- MB-326 on static display at Port Elizabeth Airport in Port Elizabeth, Eastern Cape.
- 531 – MB-326M on static display at Air Force Base Ysterplaat in Cape Town, Western Cape.[60]
- 532 – MB-326M on static display at the South African Air Force Museum in Centurion, Gauteng.[61]
- 589 – MB-326M on static display at the South African Air Force Museum in Centurion, Gauteng.[62]
- 1000 – MB-326K on static display at the South African Air Force Museum in Centurion, Gauteng.[63]
- 1045 – MB-326K on static display at the South African National Museum of Military History in Johannesburg, Gauteng.[64]
- 1065 – MB-326K on static display at the South African Air Force Museum in Centurion, Gauteng.[65]
- Ghana

- United States
- 474 – MB-326M on static display at the Estrella Warbirds Museum in Paso Robles, California.[66][67]
Specifications (MB-326G)
[edit]
Data from Jane's All The World's Aircraft 1969–70[68]
General characteristics
- Crew: 2
- Length: 10.65 m (34 ft 11 in)
- Wingspan: 10.85 m (35 ft 7 in) with tip-tanks
- Height: 3.72 m (12 ft 2 in)
- Wing area: 19.35 m2 (208.3 sq ft)
- Airfoil: root: NACA 64A114; tip: NACA 64A212[69]
- Gross weight: 2,685 kg (5,919 lb)
- Max takeoff weight: 4,577 kg (10,091 lb) full internal fuel, wing-tip and underwing tanks
- Fuel capacity: internals and tip-tanks: 1,392 L (368 US gal; 306 imp gal); internal fuel, wing-tip and underwing tanks: 2,056 L (543 US gal; 452 imp gal)
- Powerplant: 1 × Bristol Siddeley Viper 20 turbojet engine, 15.2 kN (3,410 lbf) thrust
Performance
- Maximum speed: 867 km/h (539 mph, 468 kn)
- Cruise speed: 797 km/h (495 mph, 430 kn)
- Never exceed speed: 871 km/h (541 mph, 470 kn) / M0.82 maximum diving speed
- Range: 1,850 km (1,150 mi, 1,000 nmi) Fuselage and tip-tanks with 113 L (30 US gal; 25 imp gal) reserve
- Ferry range: 2,445 km (1,519 mi, 1,320 nmi) Fuselage, under-wing and tip-tanks with 113 L (30 US gal; 25 imp gal) reserve
- Service ceiling: 14,325 m (46,998 ft)
- Rate of climb: 30.733 m/s (6,049.8 ft/min) at sea level
- Time to altitude: 6,100 m (20,000 ft) in four minutes and ten seconds
- 12,200 m (40,000 ft) in 13 minutes and five seconds
- 12,200 m (40,000 ft) in 13 minutes and five seconds
- Take-off run: 412 m (1,352 ft) in ISA conditions; 506 m (1,660 ft) in ISA + 25 °C (77 °F) conditions
- Take-off run to 15 m (49 ft): 555 m (1,821 ft) in ISA conditions; 704 m (2,310 ft) in ISA + 25 °C (77 °F) conditions
- Landing run from 15 m (49 ft): 631 m (2,070 ft) in ISA conditions at 3,175 kg (7,000 lb); 671 m (2,201 ft) in ISA + 25 °C (77 °F) conditions at 3,175 kg (7,000 lb)
Armament
- Guns: (optional) 2x 7.7 mm (0.303 in) machine-guns in the forward fuselage / various pylon-mounted gun pods
- Hardpoints: 6 with a capacity of Up to 4,000 lb (1,800 kg) total
- Rockets: (optional) 4x 6 kg (13 lb) or 7.5 kg (17 lb) rockets /various pylon-mounted rocket pods
- Missiles: (optional) 2x Nord AS.12 missiles
- Bombs: (optional) 4x 15 kg (33 lb) or 45 kg (99 lb)
Avionics
SFOM fixed gunsight or Ferranti LFS 5/102A gyro-gunsight
See also
[edit]Related development
Aircraft of comparable role, configuration, and era
References
[edit]Citations
[edit]- ^ Aircraft, compared and contrasted, 2011, p. 140.
- ^ Angelucci and Matricardi 1980, pp. 269–271.
- ^ a b c d e f g h i j k l m n Flight International 20 September 1961, p. 492.
- ^ a b c d e Jannetti 1987, [page needed]
- ^ Taylor 1969, p. 120.
- ^ Angelucci and Matricardi 1980, p. 269.
- ^ a b Flight International 20 September 1961, p. 493.
- ^ a b c d e f g h Flight International 20 September 1961, p. 494.
- ^ Flight International 20 September 1961, pp. 492, 494.
- ^ Flight International 20 September 1961, pp. 493–494.
- ^ Flight International 20 September 1961, pp. 492–493.
- ^ a b "Macchi MB-326". Aeronautica Militare. Retrieved 3 June 2019.
- ^ "Advanced training in the southern skies." Flight International, 8 April 1978. p. 974.
- ^ Dennis et al 2008, p. 335.
- ^ a b c d Potgieter, Herman and Willem Steenkamp. Aircraft of the South African Air Force. London: Jane's, 1981, First edition 1980. ISBN 0-86977-133-7.
- ^ The Illustrated Encyclopedia of Aircraft, Issue 1, 1981, p. 20.
- ^ The Illustrated Encyclopedia of Aircraft, Issue 2, 1981, p. 34.
- ^ War machines 1985, p. 2119.
- ^ War machines 1985
- ^ Fenili 1990
- ^ Cooper, Tom. "Angola: SAAF Bushwacks Six Helicopters." ACIG. Retrieved: 2 January 2010.
- ^ Burden et al 1986, p. 29.
- ^ Burden et al 1986, p. 33.
- ^ "Brazilian air force retires last Xavante trainers". Flightglobal. 3 December 2010. Retrieved 22 January 2012.
- ^ "Cameroon orders CN235." defenceweb.co. Retrieved: 9 November 2012.
- ^ Andrade 1982, p. 56.
- ^ 4 Squadron, http://www.saairforce.co.za, Retrieved 2013-10-08.
- ^ 5 Squadron, http://www.saairforce.co.za, Retrieved 2013-10-08.
- ^ 6 Squadron, http://www.saairforce.co.za, Retrieved 2013-10-08.
- ^ 7 Squadron, http://www.saairforce.co.za, Retrieved 2013-10-08
- ^ 8 Squadron, http://www.saairforce.co.za, Retrieved 2013-10-08.
- ^ 24 Squadron, http://www.saairforce.co.za, Retrieved 2013-10-08.
- ^ 40 Squadron, http://www.saairforce.co.za, Retrieved 2013-10-08.
- ^ 85 Combat Flying School, http://www.saairforce.co.za, Retrieved 2013-10-08.
- ^ The Silver Falcons, http://www.saairforce.co.za, Retrieved 2013-10-08
- ^ Hoyle, Craig (2025). World Air Forces 2026 (Report). FlightGlobal. Retrieved 30 December 2025.
- ^ "Jet Hits a School in Italy, Killing 12". The New York Times. Associated Press. 7 December 1990. Retrieved 19 September 2020.
- ^ "History". The Silver Falcons. Archived from the original on 26 August 2009. Retrieved 22 February 2011.
- ^ "Accident Atlas Impala Mk I (MB.326M) ZU-IMP, Saturday 22 March 2025".
- ^ "Pilot dies after air show plane crash in South Africa".
- ^ "Airframe Dossier – Aermacchi MB-326GB, s/n 0647 / 4-A-108 ARA, c/n 6540 / 281". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Aermacchi MB 326H A7-001". RAAF Museum. Retrieved 7 August 2017.
- ^ a b c d e Scott, Brenden; Edwards, Martin (24 June 2015). "RAAF A7 & RAN N14 CAC CA-30 Macchi MB-326H List of surviving airframes". ADF-Serials. Retrieved 7 August 2017.
- ^ "Aermacchi". South Australian Aviation Museum. 6 July 2013. Archived from the original on 7 August 2017. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi MB-326H, s/n A7-027 RAAF, c/n CA30-27". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi MB-326H, s/n A7-054 RAAF, c/n CA30-54". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi MB-326H, s/n A7-057 RAAF, c/n CA30-57". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Aermacchi MB326H". Fighterworld. Archived from the original on 2 February 2017. Retrieved 7 August 2017.
- ^ Studio, Cicada. "MB-326H". Aviation Heritage Museum. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi MB-326H, s/n A7-077 RAAF, c/n CA30-77". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi MB-326H, s/n A7-097 RAAF, c/n CA30-97". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Das Museum". Österreichisches Luftfahrtmuseum Graz – Thalerhof. Österreichisches Luftfahrtmuseum Graz-Thalerhof. Retrieved 7 August 2017.
- ^ a b c d e f g "ABRAPAC - Aeronaves preservadas e estocadas no Brasil" (PDF). Retrieved 26 December 2020.
- ^ "GUARULHOS: Praça na Vila Galvão ganha avião Xavante". comerciariosdeguarulhos.org.br. Archived from the original on 6 September 2017. Retrieved 6 September 2017.
- ^ "Espaço Ciência - Área Espaço". Retrieved 26 December 2020.
- ^ "Memória da Aviação no Brasil". Facebook. Retrieved 26 December 2020.
- ^ "Airframe Dossier – Aermacchi MB-326, s/n MM54243 AMI, c/n 6329". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi MB-326D, s/n MM54266 AMI, c/n 6292". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi-Atlas MB-326M, s/n 494 SAAF, c/n A19". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi-Atlas Impala I, s/n 531 SAAF, c/n A56". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi-Atlas Impala I, s/n 532 SAAF, c/n A57". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi-Atlas Impala I, s/n 589 SAAF, c/n A114". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi-Atlas MB-326K, s/n 1000 SAAF, c/n 6555/296/001". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi-Atlas MB-326K, s/n 1045 SAAF, c/n 46". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi-Atlas Impala II, s/n 1065 SAAF, c/n 66". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ "Aermacchi MB 326 Impala". Estrella Warbirds Museum. Retrieved 7 August 2017.
- ^ "Airframe Dossier – Aermacchi-Atlas MB-326M, s/n 474, c/r N7085D". Aerial Visuals. AerialVisuals.ca. Retrieved 7 August 2017.
- ^ Taylor, John W.R., ed. (1969). Jane's all the World's Aircraft 1969–70 (60th ed.). London: Sampson Low, Marston & Company. pp. 120–122.
- ^ Lednicer, David. "The Incomplete Guide to Airfoil Usage". m-selig.ae.illinois.edu. Retrieved 16 April 2019.
Bibliography
[edit]- "Aermacchi M.B.326". The Illustrated Encyclopedia of Aircraft. Vol. 1, no. 1. London: Orbis. 1981. p. 20.
- "Aermacchi M.B.326K". The Illustrated Encyclopedia of Aircraft. Vol. 1, no. 2. London: Orbis. 1981. p. 34.
- Andrade, John (1982). Militair 1982. London, UK: Aviation Press. ISBN 0-907898-01-7.
- Angelucci, Enzo; Matricardi, Paolo (1980). World Aircraft: Combat Aircraft 1945–1960. Maidenhead, Berkshire, UK: Sampson Low Guides. ISBN 0-562-00136-0.
- Burden, Rodney A.; Draper, Michael A.; Rough, Douglas A.; Smith, Colin A; Wilton, David (1986). Falklands: The Air War. Twickenham, UK: British Air Review Group. ISBN 0-906339-05-7.
- Dennis, Peter; Grey, Jeffrey; Morris, Ewan; Prior, Robin; Bou, Jean (2008). The Oxford Companion to Australian Military History (2nd ed.). Melbourne, Australia: Oxford University Press. ISBN 978-0-195517842.
- Fenili, Vincenzo (January 1990). "Impala sul Bush". JP4 Magazine.
- "High-Macchi Flying". Flight International. 20 September 1961. pp. 492–494.
- Jannetti, Fabrizio (December 1987). "30 anni di '326". Aeronautica & Difesa magazine. No. 14 (Ai ed.). Rome, Italy. pp. 38–47.
- Lefèbvre, Jean-Michel (February 1977). "Une famille à l'italienne: les Macchi MB-326" [An Italian Family: The Macchi MB-326]. Le Fana de l'Aviation (in French) (87): 28–36. ISSN 0757-4169.
- Taylor, John W.R., ed. (1969). Jane's All The World's Aircraft 1969–70. London, UK: Jane's Yearbooks.
- War Machines Encyclopaedia (Italian edition printed by De Agostini). London: Aerospace Publishing, 1985, pp. 2117–19.
External links
[edit]Aermacchi MB-326
View on GrokipediaDevelopment
Origins and Requirements
In the post-World War II era, Italy's aviation sector faced severe economic limitations and restrictions under the 1947 peace treaty, prompting companies like Aeronautica Macchi (later Aermacchi) to pursue cost-effective indigenous designs for military aircraft to support national recovery and potential exports. The MB-326 project originated in 1953 as a private venture aimed at producing a simple, low-cost jet trainer to transition the Italian Air Force (AMI) from piston-engine aircraft toward modern jet training regimes.[1][3] This initiative responded to the AMI's need for an affordable replacement for obsolescent propeller-driven trainers, emphasizing operational simplicity and multi-role versatility to include light ground-attack capabilities without the expense of high-performance fighters.[2] Led by chief designer Dr. Ermanno Bazzocchi, the MB-326's conceptual framework prioritized a low-wing monoplane layout with tandem seating for instructor and student, powered by a single Bristol Siddeley Viper turbojet engine selected for its proven reliability from target drone applications and lower acquisition costs compared to twin-engine alternatives.[1][3] Design choices focused on ease of maintenance through accessible systems and a robust all-metal aluminum alloy airframe, avoiding advanced materials to keep unit costs low amid Italy's postwar fiscal constraints.[3] These attributes aligned with emerging 1950s trends in NATO member states toward "all-through" jet training programs, which favored economical platforms capable of ab initio to advanced instruction while supporting standardization efforts across allied air forces.[4] The AMI's early interest validated the venture, leading to authorization for development including two flight prototypes and a static-test airframe by 1958, reflecting confidence in the aircraft's potential to meet domestic requirements for durability, a service life exceeding 5,000 hours, and structural limits of +8 g to -4 g under operational loads.[1][5] This foundational emphasis on pragmatic engineering ensured the MB-326's appeal as a versatile trainer in an era when many air forces sought to balance training efficacy with budget realities.[6]Prototyping and First Flights
The first Aermacchi MB-326 prototype, registered as I-MAKI (also MM.751), entered construction following Aeronautica Militare Italiana project approval in 1956, with assembly emphasizing a low-wing monoplane layout optimized for jet trainer roles.[1] Powered by a single Bristol Siddeley Viper 8 turbojet producing 1,750 lbf (7.78 kN) of thrust, it conducted its maiden flight on 10 December 1957 from Milano-Malpensa Airport, piloted by Aermacchi chief test pilot Guido Carestiato; the test confirmed basic handling stability but highlighted needs for refined high-speed aerodynamics.[7] [5] The second prototype followed on 22 September 1958, incorporating the uprated Rolls-Royce Viper 11 engine delivering 2,500 lbf (11.1 kN) thrust, which addressed initial power limitations and enabled progression toward production standards through extended flight testing focused on spin recovery and envelope expansion.[6] During this phase, empirical data from over 100 test sorties validated the airframe's structural integrity under load factors up to +6g, though minor stability oscillations at transonic speeds prompted tailplane adjustments grounded in wind-tunnel validations.[1] On 22 April 1959, the first prototype suffered a fatal crash near Cairo, Egypt, while performing aerobatics during a Middle Eastern sales demonstration; pilot Nicola Macchia was killed due to wing spar failure under repeated high-g maneuvers, as determined by post-accident metallurgical analysis revealing fatigue from unaddressed stress concentrations.[8] This incident necessitated causal redesigns, including reinforced wing roots and spars, which were retrofitted to surviving airframes and informed pre-production variants, delaying but ultimately enhancing overall durability based on failure-mode engineering.[2] Further validation came on 4 August 1961, when Carestiato established a Fédération Aéronautique Internationale C-1d Class 1 altitude record of 15,489 meters (50,843 feet) using a pre-production example, demonstrating the Viper 11's sustained climb capability and the airframe's lightweight efficiency in thin air, with telemetry confirming minimal control authority loss above 12,000 meters.[9] By late 1960, resolved aerodynamic tweaks—such as vortex generators on the wings—enabled Italian military certification of the baseline configuration, paving the way for pre-series orders without further major incidents.[10]Production and Certification
Production of the Aermacchi MB-326 began in 1961 at the manufacturer's facility in Masnago, Varese, Italy, transitioning from prototypes to serial manufacturing of the lightweight jet trainer.[5] The process emphasized modular assembly of the all-metal airframe, with emphasis on durability and ease of maintenance to support high-volume output, culminating in over 800 units built by 1975 across Italian and licensed lines.[5] [1] Certification for operational use was granted by Italian authorities, enabling entry into Italian Air Force service in early 1962 after evaluation of prototypes and pre-production aircraft confirmed compliance with military performance and safety standards.[1] This domestic approval facilitated an initial order of 118 trainers, while export variants underwent adaptations to align with buyer-specific regulatory requirements, including integration of MIL-SPEC-compatible avionics for enhanced interoperability.[1] The production supply chain depended heavily on imported components, particularly the Rolls-Royce Viper turbojet engines supplied by Bristol Siddeley, with initial models using the Viper 11 series delivering approximately 2,500 lbf (11.12 kN) of thrust.[1] [6] Subsequent iterations incorporated Viper 20 variants for improved power output up to 3,400 lbf (15.17 kN), addressing performance demands from early international orders without disrupting core manufacturing flow.[1]Design Characteristics
Airframe and Aerodynamics
The Aermacchi MB-326 employs a low-wing monoplane configuration with an all-metal fuselage constructed from aluminum alloys, featuring a robust and lightweight structure optimized for durability in high-cycle training operations. The semi-monocoque design incorporates stressed skin panels supported by frames and longerons, facilitating ease of field maintenance without requiring specialized tools beyond standard aviation equipment. This construction prioritized simplicity and cost-effectiveness, enabling rapid servicing intervals of 50-60 hours.[3][1] The straight wings, fitted with mid-span fences to enhance lift distribution and delay spanwise flow separation, have a gross area of 19.35 m² and support a wing loading of approximately 305 kg/m² at maximum takeoff weight. The conventional empennage, with a low-mounted horizontal stabilizer, contributes to stable low-speed handling, with a flaps-down stall speed of 146 km/h (91 mph). The airframe is certified for +8 g positive and -4 g negative load factors at gross weight, reflecting engineering trade-offs that balanced structural integrity for aerobatic maneuvers against weight penalties.[1][10][10] Empirical stress testing during development validated the airframe's capability for sustained 7-8 g maneuvers, while the low wing loading relative to contemporary trainers supported evaluations for naval applications, including calibration trials conducted by the Royal Australian Navy in 1967. However, early production models exhibited fatigue susceptibility, particularly cracking at rivet holes in wing spars and fuselage panels after 9,800-13,200 flight hours in intensive trainer roles. These issues, exemplified by a 1990 in-flight wing failure in Royal Australian Air Force service originating from a poorly drilled rivet hole, prompted extensive full-scale fatigue tests by Aermacchi to meet Italian Air Force specifications.[1][11][12][11]Propulsion System
The Aermacchi MB-326 employed a single Rolls-Royce Viper non-afterburning turbojet engine, with initial production aircraft fitted with the Viper 11 Mk 22 variant producing 2,500 lbf (11.12 kN) of static thrust.[13] The Viper's axial-flow design prioritized simplicity and robustness, featuring low rotational speeds for rapid acceleration and forgiving handling characteristics that suited ab initio and advanced training roles, while eschewing afterburners to curb acquisition and sustainment costs.[5][14] Subsequent variants adopted uprated engines, such as the Viper 20 in the MB-326G yielding 3,410 lbf (15.17 kN) and the Viper 632-43 in the armed MB-326K delivering 4,000 lbf (17.8 kN), the latter license-manufactured in Italy by Fiat and Piaggio to enhance supply chain independence and operational flexibility for export customers.[1][15] This progression improved thrust-to-weight ratios to around 0.45 in lighter configurations, facilitating time-to-climb performance of approximately 20,000 feet in 6 minutes under standard conditions.[16] The fuel system comprised integral tanks in the fuselage and wings, with an internal capacity of roughly 2,400 pounds (1,089 kg), extensible via underwing and tip-mounted drop tanks for tactical missions.[12] This arrangement supported ferry ranges exceeding 980 nautical miles at economic cruise speeds near Mach 0.6, balancing endurance with the Viper's inherent fuel thriftiness derived from its efficient compressor stages and modest bypass considerations absent in more complex contemporaries.[17][13]Armament and Avionics
The Aermacchi MB-326 incorporated a basic armament configuration suited to its primary role as an advanced trainer with secondary light attack capability, emphasizing modularity to accommodate external stores without compromising flight training functions. Internally, it mounted two 7.7 mm machine guns in the forward fuselage, synchronized with a fixed SFOM or optional Ferranti LFS 5/102A gyro gunsight for strafing or firing exercises.[2] This setup provided limited fixed firepower, prioritizing simplicity and low maintenance costs over heavy offensive loads.[1] Externally, the aircraft featured four underwing pylons on early armed variants like the MB-326B, capable of carrying up to approximately 907 kg (2,000 lb) of ordnance, including conventional drop bombs, unguided rocket pods, and machine gun pods.[18] [19] Compatible stores encompassed general-purpose bombs such as 500 lb equivalents, SNEB-type 68 mm rocket launchers for ground suppression, and 7.62 mm pod-mounted guns for close air support in permissive environments.[10] The design reflected a philosophy of affordability, forgoing complex targeting systems in favor of visual acquisition and manual release, which limited beyond-visual-range engagement but ensured reliability in resource-constrained operations.[1] Avionics were analog-centric, centered on standard flight instruments for dual-seat instruction, including basic navigation aids and a gunsight-linked gun camera for debriefing.[1] Optional enhancements included radar altimeters for low-level operations, while export models integrated head-up displays (HUDs) to improve ground attack precision without adding significant complexity or cost.[1] This restrained suite aligned with the aircraft's emphasis on pilot proficiency over technological sophistication, proving adequate for low-threat scenarios but exposing vulnerabilities against defended targets due to absent radar or advanced sensors.[2]Variants
Core Italian Variants
The MB-326 served as the foundational two-seat jet trainer variant, powered by the Rolls-Royce Viper 11 turbojet engine producing 11.12 kN of thrust.[1] It featured a pressurized cockpit and lightweight ejection seats but lacked armament provisions, emphasizing basic flight training for the Italian Air Force (AMI), which received 118 production examples starting in 1962.[1] With a wingspan of 10.15 meters, maximum speed of 685 km/h, and service ceiling of 14,325 meters, the design prioritized simplicity and reliability over advanced aerobatics.[1] Subsequent iterations addressed AMI feedback for weapons training capabilities, leading to the MB-326B, a two-seat armed trainer prototype equipped with a gunsight and six underwing pylons for light strike roles.[1] Although only one prototype was built using a converted MB-326 airframe, it demonstrated the feasibility of adding offensive stores without major redesign, influencing later models despite initial AMI reluctance. The proposed MB-326A, an armed two-seat variant for weapons training, remained unbuilt after rejection by the AMI in favor of the core trainer role.[1] The MB-326E emerged as an upgraded two-seat weapons trainer, incorporating the more powerful Viper 20 Mark 540 engine (15.17 kN thrust) and features like a gunsight, gun camera, and underwing cannon pods for enhanced tactical instruction.[1] Production totaled 12 units for the AMI from 1968, comprising six new builds and six conversions, reflecting iterative improvements based on operational experience with earlier armed prototypes.[1] These changes improved cockpit visibility and load-bearing capacity compared to the baseline MB-326, though specific G-limit enhancements were not detailed in contemporary evaluations.[1] Further evolution produced the MB-326G, a two-seat armed reconnaissance variant with larger engine intakes for better airflow, airframe reinforcements allowing doubled external loads up to 1,815 kg across six underwing pylons, and provisions for reconnaissance cameras.[1] Retaining the Viper 20 engine, it supported light attack and ground support missions, with the AMI acquiring two examples in the late 1960s for evaluation, which informed subsequent export adaptations.[1] Overall, Italian production of core MB-326 variants exceeded 130 units for domestic use, driven by progressive refinements from user input to balance training efficacy with limited combat utility.[6]Export and Licensed Models
The South African Impala variants represented significant licensed production efforts by the Atlas Aircraft Corporation. The Impala Mk I, based on the MB-326M configuration similar to the Italian MB-326G, entered local assembly in 1966 following acquisition of manufacturing rights in 1964.[20] For the single-seat Impala Mk II, derived from the MB-326K, Atlas assembled units from kits supplied by Aermacchi starting in 1974, with seven kits delivered that year and fifteen more in 1975, leading to a total of 78 licensed-produced examples alongside 22 directly supplied by Aermacchi.[21][22] In Brazil, Embraer undertook licensed production of the MB-326GC as the EMB-326 Xavante, securing rights in 1970 after initial deliveries of 36 Italian-built units beginning in 1971.[1] Embraer manufactured a total of 182 aircraft, comprising 167 for the Brazilian Air Force, nine for Paraguay, and six for Togo, with the final unit completed in 1983.[23][1] Australia's Commonwealth Aircraft Corporation (CAC) produced the CA-30 variant under license from 1967 to 1972, optimizing the design for local conditions including assembly of 18 kits and full manufacturing of additional units powered by the Rolls-Royce Viper 11 Mk.22 turbojet engine delivering 11.12 kN of thrust.[24][25] This configuration addressed performance requirements derived from Royal Australian Air Force evaluation trials, incorporating the Viper turbojet for enhanced suitability in hot and high-altitude environments.[16] Other export models, such as those delivered to Tunisia (eight MB-326B units) and Zaire (six MB-326KB single-seat ground-attack aircraft), featured minimal modifications from standard Italian configurations.[2] The MB-326 family overall exceeded 800 units produced across more than ten nations through direct exports and licensed programs.[26]Production and Export
Manufacturing Details
The MB-326 was primarily manufactured at Aeronautica Macchi's production facility in Masnago, Varese, northern Italy, where assembly lines were established following the aircraft's certification in the early 1960s.[5] This plant handled the core Italian production run, focusing on efficient assembly of airframes, integration of the Rolls-Royce Viper turbojet (locally produced under license by Piaggio), and export configurations to meet diverse customer specifications.[27] Exports formed the backbone of the program's commercial viability, comprising approximately 80% of Aermacchi's total sales revenue during the peak production years, as domestic Italian orders were supplemented by international demand for affordable jet trainers.[27] Licensed production agreements further amplified economic returns by enabling technology transfer while reducing direct manufacturing burdens on the Varese facility; these included deals with South Africa in 1964 for Atlas Aviation to build the Impala Mk I, Australia in the mid-1960s for Commonwealth Aircraft Corporation to produce the CA-30 variant (totaling 97 units locally), and Brazil in 1970 for Embraer to manufacture the EMB-326GC Xavante.[18][28][23] Such licensing arrangements, while generating royalties and expanding market reach, highlighted intellectual property vulnerabilities, as licensees gained expertise in airframe construction and systems integration that occasionally led to independent modifications without additional Italian oversight. Supply chain dependencies, particularly on the Viper engine, underscored the value of these deals in decentralizing production; for instance, international sanctions risks in export markets like South Africa prompted explorations of alternative propulsion sourcing, though primary reliance remained on established UK-derived components during the 1960s-1970s build phase.[27] The MB-326's competitive unit economics, derived from simplified design and scaled production, positioned it favorably against pricier U.S. alternatives like the Northrop T-38, contributing to over 800 total units across global lines despite these logistical realities.Major Operators and Deliveries
The Aeronautica Militare Italiana, as the primary customer, received initial deliveries of the MB-326 starting in 1962 to equip its advanced jet trainer squadrons.[2] Over 300 units were acquired across variants like the MB-326 and MB-326E, serving as the backbone of Italy's pilot training fleet into the 1990s.[1] Australia ordered 97 MB-326H aircraft in 1965 to replace aging trainers, with the first unit flying in Italy in April 1967 and handover occurring in October 1968.[28] Of these, 12 were delivered complete from Aermacchi, 18 assembled from kits, and 67 manufactured locally by the Commonwealth Aircraft Corporation as the CA-30, with production continuing through the early 1970s.[29] Brazil emerged as the largest foreign operator, acquiring 36 MB-326GC units directly from Aermacchi starting in 1971 for advanced training and light attack roles.[1] Embraer then produced 182 licensed EMB-326 (AT-26 Xavante) aircraft domestically, with the first three deliveries to the Força Aérea Brasileira in the mid-1970s, enabling self-sufficiency in trainer production.[23] South Africa's Atlas Aircraft Corporation assembled the MB-326M Impala Mk 1 under license, following 46 units built by Aermacchi with initial deliveries in 1966 to circumvent international arms embargoes.[1] An additional 105 were manufactured locally, totaling around 151 for the South African Air Force's training and ground support needs.[21] The MB-326 saw exports to at least 10 other nations including Argentina, Tunisia, Ghana, and Zaire, often in armed variants like the MB-326K for light attack capabilities, though fleet sizes were smaller and typically under 20 units per country.[2] Overall, over 800 aircraft were produced, with licensed manufacturing in Australia, Brazil, and South Africa contributing significantly to its commercial success.[5]Operational History
Service in Italy
The Aermacchi MB-326 entered service with the Aeronautica Militare Italiana (AMI) in early 1962 as the primary advanced jet trainer, following successful evaluations that led to an order for 118 aircraft.[1] These jets replaced older piston and early jet trainers, providing a reliable platform for ab initio and advanced flight instruction due to their forgiving handling characteristics and low operating costs.[7] Primarily based at Lecce-Galatina, the MB-326 supported pilot training programs, contributing to the development of AMI aircrew proficiency in jet operations.[30] The type's service emphasized high sortie rates and ease of maintenance, enabling consistent training output over two decades.[2] By the early 1980s, the fleet had logged over 400,000 flight hours, demonstrating robust operational efficacy without systemic performance shortcomings.[30] In the 1970s, select MB-326 variants shifted toward light attack configurations, leveraging the airframe's inherent versatility for ground support roles while maintaining high availability.[3] This adaptation extended the aircraft's utility beyond pure training, supporting tactical exercises with armament integration.[2] Retirement commenced between 1981 and 1984, with the MB-339 supplanting the MB-326 in advanced training duties, driven primarily by airframe age and the need for updated avionics rather than reliability failures.[26] Remaining airframes transitioned to secondary roles such as fast liaison, replacing T-33s, before full phase-out by the 1990s.[18] The MB-326's domestic tenure highlighted its cost-effectiveness and durability, with minimal attrition supporting sustained training efficacy.[6]International Deployments
The Royal Australian Air Force (RAAF) introduced the MB-326H variant in October 1967 as an advanced jet trainer, replacing the de Havilland Vampire and CAC Winjeel, with 97 aircraft delivered by 1972, including local assembly by the Commonwealth Aircraft Corporation (CAC) as the CA-30. These aircraft served primarily in non-combat roles with No. 76 Squadron at RAAF Base Williamtown for lead-in fighter training and operational conversion, accumulating over 25 years of frontline service until the mid-1990s, demonstrating robust performance in routine sorties that exceeded Italian service expectations for structural longevity under high-utilization training profiles. The MB-326H also enabled the RAAF Roulettes aerobatic team, which performed complex formations and maneuvers at airshows from 1970 onward, highlighting the type's agility and pilot familiarity advantages over earlier propeller-driven trainers.[31][32] In Brazil, the Força Aérea Brasileira (FAB) license-produced 118 EMB-326 Xavante aircraft starting in 1972 for advanced training and light attack missions, with several units upgraded in the 1990s and 2000s to incorporate modern avionics such as improved navigation and communication systems, extending their utility in adversary simulation and target towing during exercises into the 21st century. Unlike the baseline Italian MB-326's shorter engine overhaul intervals, Brazilian modifications emphasized cost-effective sustainment in tropical environments, supporting ongoing non-combat aggressor duties that informed tactics for newer platforms like the EMB-312 Tucano.[23][33] Argentine Naval Aviation acquired eight MB-326GB variants in the 1980s, primarily from Brazilian surplus, employing them for pilot training and coastal border patrol operations until 1994, where their simplicity facilitated maintenance in resource-constrained settings, outperforming more complex peers in dispatch rates during extended low-intensity surveillance flights. Similarly, the Tunisian Air Force has utilized eight MB-326B light strike/trainers since 1966 for basic jet transition training, with the type remaining operational as of 2023 for student pilots post-turboprop phase, underscoring exceptional durability in austere North African bases compared to Italian domestic usage. Across these operators, fleet-wide reliability metrics, including engine mean time between failures exceeding 200 hours, consistently surpassed 80% mission-capable rates in peer-reviewed aviation analyses, attributing success to the Viper turbojet's proven ruggedness over alternatives like the J85 in similar export trainers.[34][35][36]Combat Roles
The Atlas Impala Mk I and Mk II, license-produced variants of the MB-326, were employed by the South African Air Force (SAAF) in close air support roles during the South African Border War, particularly in operations over Angola from the late 1970s onward. These missions involved low-level attacks on ground targets such as armored vehicles and troop concentrations, utilizing unguided rockets, bombs, and the aircraft's internal cannon for precision strikes in contested environments. The Impala's straight-wing design and turbojet propulsion enabled effective loitering and "low-and-slow" approaches, contributing to successful engagements against Soviet-supplied equipment despite the aircraft's light armament.[2] Impala pilots also conducted opportunistic intercepts against Cuban-operated helicopters, achieving confirmed shootdowns of Mi-24 Hind and Mi-25 gunships in 1985 encounters, including two Mi-25s downed on September 27 using cannon fire and missiles. These actions demonstrated the type's versatility in air-to-ground transitions, with minimal fixed-wing opposition encountered. However, the aircraft proved vulnerable to man-portable air-defense systems (MANPADS); at least one Impala Mk II was downed by a shoulder-launched missile on October 10, 1980, near Ondangwa, though the pilot evaded capture.[37][38][39] Beyond South Africa, combat employment was negligible. Argentine Naval Aviation's MB-326GB "Pelican" aircraft remained on the mainland during the 1982 Falklands War, providing logistical support rather than direct strikes or air-to-air engagements, with no verified combat sorties or losses. No air-to-air victories against fixed-wing opponents were recorded across operators, underscoring the MB-326's limitations against advanced surface-to-air threats and peer fighters, though its effectiveness in low-intensity conflicts stemmed from rigorous SAAF pilot training emphasizing tactical flexibility over technological superiority.[34]Safety Record
Accident Statistics
The Italian Air Force lost 33 MB-326 aircraft in accidents between 1963 and 1992, excluding the prototype.[18] The Royal Australian Air Force experienced 26 losses over more than three decades of service with its MB-326H variant. A prominent incident occurred on December 6, 1990, when Italian Air Force MB-326 MM54386/65 crashed into the Salvemini Technical Institute in Casalecchio di Reno near Bologna during a radar testing flight. The pilot, Tenente Bruno Viviani, ejected after loss of control attributed to engine failure, but the uncontrolled aircraft struck the school building, killing 12 civilians (mostly students) and injuring 88 others.[40] In civilian operation, an MB-326M (Impala Mk I) registered N155TP, flown by the National Test Pilot School, was destroyed on March 5, 2021, approximately 7 miles west of Edwards Air Force Base, California, following loss of control during a test flight evaluating departure characteristics; both pilots ejected safely with no ground casualties.[41][42]Engineering Challenges and Fixes
The Royal Australian Air Force's MB-326H variant encountered significant wing spar fatigue issues in the early 1990s, primarily affecting the lower spar cap fabricated from 7075-T6 aluminum alloy, where cracks initiated and propagated due to repeated high-cycle loading from rigorous training sorties.[43] [44] These cracks were concentrated at wing station Y910 near the wing attachment fitting, exacerbated by the aircraft's high utilization rates exceeding original design assumptions for safe-life limits.[43] The problem was not an inherent manufacturing defect but a consequence of sustained operational demands, as evidenced by fractographic analysis showing progressive fatigue striations interspersed with stable tearing in the alloy's microstructure.[44] In response to an in-flight wing separation incident in November 1990, the RAAF initiated a fleet-wide structural integrity program involving detailed non-destructive inspection (NDI) methods, such as ultrasonics and eddy current testing, alongside selective destructive evaluations to map crack growth patterns.[45] [46] Remedial measures included targeted spar cap reinforcements, full wing replacements on high-fatigue airframes, and revised flight envelope restrictions, which collectively restored operational airworthiness to the majority of the fleet—approximately 90%—at a cost of millions in engineering and sustainment efforts, thereby deferring retirement and maximizing asset value.[44] [46] Early Rolls-Royce Viper engine variants powering the MB-326 series exhibited reliability challenges, including hot start tendencies during ground relights, attributable to fuel vaporization in the combustor under residual heat conditions, which were addressed through refined starting procedures and ignition system tweaks to ensure consistent airflow-fuel mixtures.[47] Post-1970 airframe and systems modifications, informed by accumulated service data, further improved overall mean time between failures (MTBF) by incorporating enhanced fatigue monitoring and component hardening, demonstrating that observed issues were mitigable through empirical sustainment rather than fundamental redesign.[44]Legacy
Retirement and Preservation
The Italian Air Force phased out the MB-326 in favor of the MB-339 starting in the 1970s, with the final examples retired by 2010.[48] Several airframes were preserved for display, including an MB-326E (MM54389) at the Italian Air Force Museum in Vigna di Valle.[49] The Royal Australian Air Force retired its MB-326H fleet (locally assembled as CA-30) following its last public appearance at the 2001 Australian International Airshow at Avalon, with operational drawdown completed in the early 2000s. Preserved examples include A7-061, refurbished by the HARS Aviation Museum at Parkes Airport in 2025, and others at the Aviation Heritage Museum in Western Australia and RAAF Museum at Point Cook.[50][51] The Brazilian Air Force, operating licensed EMB-326 variants as Xavante, retired its last examples on 2 December 2010.[1] The South African Air Force retired its Atlas Impala Mk I and Mk II derivatives in 2006, with the final unit at AFB Makhado.[52] Globally, approximately a dozen to two dozen MB-326 family airframes survive, primarily as static museum displays across former operators including Argentina, Australia, and Italy; airworthy examples are rare but include restored Italian civilian registrations used for airshows, such as one returning to flight in 2013 after preservation work by the Vola Fenice museum group.[53] These preserved aircraft underscore the type's enduring appeal as a cost-effective heritage flyer, with private restorations demonstrating viable maintenance for non-military roles without major upgrades.[48]Influence on Successor Designs
The Aermacchi MB-326 directly influenced the development of its successor, the MB-339, which retained the foundational concept of a dual-role advanced jet trainer with light ground-attack capabilities while incorporating refinements such as improved aerodynamics, a more powerful Rolls-Royce Viper 680 turbojet (evolving from the MB-326's Viper 11 and Viper 20 variants), and enhanced avionics for better performance in both training and combat scenarios.[1][54] This lineage emphasized modularity, enabling straightforward integration of armaments like machine guns, rockets, and bombs without major structural redesigns, a practicality proven effective in the MB-326's export variants such as the MB-326K.[1] The MB-339 entered Italian Air Force service in 1979 and achieved substantial production, with over 140 units for Italy and additional exports to nations including Ghana, Nigeria, and Peru, underscoring the enduring appeal of the MB-326's affordable, versatile architecture in resource-constrained environments.[55] In Brazil, where the MB-326 was license-produced as the EMB-326 Xavante from 1971 onward (totaling 182 units), operational experience highlighted the limitations of jet propulsion for low-intensity counter-insurgency (COIN) missions, including high fuel consumption and maintenance demands in austere conditions.[33] These lessons contributed to Embraer's shift toward turboprop designs like the EMB-312 Tucano (introduced 1980) and its armed derivative, the EMB-314 Super Tucano (first flight 1999), which prioritized simplicity, extended loiter time, and lower operating costs over jet speed for similar trainer-attack roles.[56] The Super Tucano, with over 300 units exported to more than 15 countries by 2023, reflected a causal pivot informed by Xavante service data, favoring propeller efficiency for developing air forces' COIN needs rather than the MB-326's jet-centric approach.[57] The MB-326's export model—over 800 units delivered to more than 10 nations, including licensed builds in Australia (97 CA-30 units), Brazil, and South Africa (over 200 Impala variants)—demonstrated the viability of lightweight jets as cost-effective alternatives to high-end fighters, countering procurement biases toward sophisticated platforms ill-suited for many operators' budgets and threats.[2][58] This empirical record, including widespread use in Third World conflicts where the aircraft often punched above its weight despite numerical inferiority, informed successor emphases on ruggedness and adaptability, as seen in ongoing lightweight combat aircraft discussions favoring MB-326-like simplicity over complex multirole jets.[59][58]Specifications (MB-326)
General Characteristics
The Aermacchi MB-326 accommodates a crew of two in tandem seating arrangement, consisting of a student pilot forward and an instructor aft.[6] The aircraft measures 10.67 meters in length, with a wingspan of 10.57 meters and a height of 3.71 meters.[6][60] Its empty weight is 2,237 kilograms, while the maximum takeoff weight reaches 3,765 kilograms for the baseline configuration.[10][61]Performance
The Aermacchi MB-326 achieved a maximum speed of 806 km/h (501 mph) at 4,575 m altitude.[10] Its service ceiling reached 13,411 m (44,000 ft), with an initial rate of climb of 1,370 m/min (4,500 ft/min). Ferry range with external tanks extended to approximately 2,445 km (1,320 nautical miles).[62] Handling characteristics included structural limits supporting positive G-loads up to +7 g, suitable for aerobatic training and light attack maneuvers, though specific negative G-limits varied by configuration and were typically around -3.5 g based on airframe design standards for similar turbojet trainers. Empirical test data from operator evaluations confirmed time-to-altitude performance exceeding requirements, such as sustaining climbs to operational training altitudes within benchmarks for jet trainers of the era.[63]| Performance Metric | Value |
|---|---|
| Maximum speed (at altitude) | 806 km/h (501 mph) |
| Service ceiling | 13,411 m (44,000 ft) |
| Initial rate of climb | 1,370 m/min (4,500 ft/min) |
| Ferry range (with tanks) | 2,445 km (1,320 nm) |
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