Aermacchi

The company was established in 1912 by Giulio Macchi as Nieuport-Macchi, building Nieuport monoplanes under licence for the Italian military from a factory on the shores of Lake Varese. During World War I it produced a series of Nieuport designs and seaplanes. In the interwar period, as Aeronautica Macchi, the company developed a succession of Schneider Trophy racing seaplanes, including the Macchi M.39 (1926), M.52 (1927), M.67 (1929), and the M.C.72 (1931), which set a world airspeed record. The firm also produced the M.C.200 Saetta fighter before and during World War II, followed by the M.C.202 Folgore and M.C.205 Veltro.

After World War II the company became Aermacchi and pivoted toward jet trainer aircraft, developing the MB-326 (1957) and later the MB-339, which became widely used military trainers. In July 2003 Aermacchi was integrated into the Finmeccanica Group as Alenia Aermacchi.

Aermacchi began producing motorcycles around 1951 as a means of addressing post-war demand for affordable transport. Its earliest offering was a scooter-motorcycle hybrid called the Convertible, with a semi-enclosed drivetrain and footboards. This was followed in 1953 by the Zeffiro, available in 125 cc and 150 cc two-stroke versions.

In 1955 the company introduced the 125 cc Monsone and the 150 cc Corsaro, both featuring telescopic front forks and pivoted rear suspension. A significant development came in 1956 with the Chimera, which introduced an overhead-valve four-stroke engine mounted horizontally — a layout that would become characteristic of the marque. Sport models with 175 cc and 250 cc single-cylinder engines followed in 1957.

In 1960, US manufacturer Harley-Davidson purchased a 50 per cent stake in Aermacchi's motorcycle division. The Italian operation was branded Aermacchi-Harley-Davidson, with the first joint product being a modified version of the Ala Verde adapted for the American market. In 1972 Harley-Davidson acquired the remaining shares, taking full ownership, and in 1974 the motorcycle holdings were sold to AMF-Harley-Davidson. Cagiva purchased the business in 1978.

Following the Harley-Davidson investment, Aermacchi developed racing machinery beginning with the 250 cc Ala d'Oro, a production-volume road racing machine. Early results in competition were inconsistent, but the programme matured progressively. In the 1966 350 cc World Championship, racer Renzo Pasolini placed third. Third place was achieved again in 1968 with Kelvin Carruthers, who also competed at the Isle of Man TT the following year.

A new chapter opened in 1971 with the development of twin-cylinder two-stroke racers in 250 cc and 350 cc configurations, designed by the factory's chief engineer, Ing. William Soncini. The first 250 cc twin produced 46 horsepower at 11,000 rpm and weighed approximately 250 pounds. After Harley-Davidson assumed full ownership in 1972 and funded further development, the racers carried Harley-Davidson branding on their fuel tanks.

These machines delivered Harley-Davidson's only Grand Prix victories and four World Championships: the 250 cc title in 1974, 1975, and 1976, and the 350 cc title in 1976. All four championships were won by Italian rider Walter Villa, whose consistency and speed on the Varese-built two-stroke twins represented the high point of the Aermacchi-Harley-Davidson racing programme.

The Aermacchi story is unusual in bridging aviation and motorcycle manufacturing, with both disciplines producing machinery of international competitive significance. The Varese factory's World Championship-winning two-stroke twins of the mid-1970s remain the only Grand Prix motorcycle championships associated with the Harley-Davidson name. After Cagiva's 1978 acquisition, the Varese factory continued under new ownership, eventually contributing to Cagiva's own competition efforts in grand prix motorcycle racing.