English: Operating as a small subsidiary of the Auburn Auto Company, Lycoming produced its first aeronautical engine, the R-680, in 1929. The engine’s straightforward design and overall reliability established the company as a leader in the design and manufacture of aircraft engines. As a result, the Aviation Corporation acquired Lycoming in 1932 to add its engines to the corporation’s range of aeronautical products, which
included Stinson aircraft and Smith variable-pitch propellers.
The R-680 series powered various models of the Stinson Reliant cabin plane of the 19308 and the Boeing PT-13 Kaydet trainer of World War II. Overall, Lycoming manufactured over 26,000 R-680 engines. This R-680-BA, an early model in the R-680 series, first appeared in 1932.
Picture taken at the National Air and Space Museum's Steven F. Udvar-Hazy Center in Chantilly, Virginia, USA
Type: reciprocating 9 cylinders, radial, air cooled
Power Rating: 179 kW (240 hp) at 2,000 rpm
Displacement: 11L (680 cu in)
Weight: 225 kg (505 lb)
Manufacturer: Lycoming Manufacturing Co., Williamsport, Pa, USA
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