The Aermacchi or Macchi MB-326 is a light military jet trainer designed and produced by the Italian aircraft manufacter 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. The MB-326 was developed during a period in which "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 be perform both elementary and advanced training right through to a near combat-ready standard. 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 issued Aermacchi was an order for 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 simplicity and economy of scale of operating just one type for all training purposes was usually outweighed by the purchase and operating costs of a large all-jet training fleet. Many operators 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. 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. 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. 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. 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. 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. 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. Australia 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. 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, aka Plastic Parrot), 150 hours medium and another 75 hours advanced training on MB-326H, before finally progressing to the Mirage IIIOD. Although widely liked for its excellent handling and well-suited to its task, 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 flying hours, and the last examples had been withdrawn by 2001 when they were replaced by the Hawk 127. For more details of development, design and operational history, and the many variants, click here.
