The Vintage Ultralight SR-1 Hornet is an American homebuilt aircraft produced by the Vintage Ultralight and Lightplane Association of Marietta, Georgia, introduced in the early 1980s. The aircraft was supplied in the form of plans for amateur construction, although plans are no longer available.
The aircraft was designed to comply with the US FAR 103 Ultralight Vehicles rules, including the category's maximum empty weight of . The aircraft has a standard empty weight of .
The SR-1 Hornet features a strut-braced and cable-braced biplane layout, a single-seat open cockpit, fixed conventional landing gear with a steerable tail wheel, and a single engine in pusher configuration.
The aircraft is made from bolted-together aluminum tubing, with its flying surfaces covered in doped aircraft fabric. Its span wing has a wing area of . The Hornet has the largest wing area and lightest wing loading of any ultralight of its period. The acceptable power range is and the standard engine used is the Cuyuna 430 powerplant. The engine is mounted between four tubes that support the tail surfaces.
The SR-1 Hornet has a typical empty weight of and a gross weight of , giving a useful load of . With full fuel of the payload for the pilot and baggage is .
The standard day, sea level, no wind, take off and landing roll with a engine is .
The designer estimated the construction time from the supplied plans as 250 hours.
The Hornet was widely sold in the United States in the 1980s.
In the United States ultralights are not required to be registered, and in April 2014 no examples were in fact registered in the United States with the Federal Aviation Administration, although a total of two had been registered at one time.