Air-cooled aircraft piston engines

flat-four piston aircraft engine family

1930s piston aircraft engine family by de Havilland

6-cylinder horizontally-opposed piston engine family by Lycoming

1900s French aircraft piston engne

four-cylinder horizontally-opposed piston aircraft engine family

German aircraft engine

4-cylinder horizontally-opposed piston engine family

1947 6-cylinder horizontally-opposed piston engine family by Continental

rotary aircraft engine

R-9 piston aircraft engine

1910s British piston aircraft engine

four-cylinder horizontally-opposed piston aircraft engine family

1936 6-cylinder inline piston engine family by de Havilland

family of small, low-horsepower, four-cylinder, air-cooled engines

rotary 9 cylinder piston aircraft engine

type of aircraft engine

engine family by Continental

11-cylinder radial piston engine

I-6 air cooled piston aircraft engine

four-cylinder, air-cooled, in-line, inverted aero-engine series

1950 6-cylinder horizontally-opposed piston engine family by Continental

1930s piston aircraft engine model by de Havilland

Spanish four-cylinder inverted air-cooled engine designed and built by Elizalde SA shortly after the Spanish Civil War

nine-cylinder air-cooled aircraft Diesel engine

rotary piston aircraft engine

O-4 piston aircraft engine family

1997 direct drive, six-cylinder airplane engine, including the AEIO-580 aerobatic engine

O-2 piston aircraft engine

6-cylinder horizontally-opposed piston engine family by Lycoming

French series of aircraft engines

four-cylinder aircraft engine

twin-cylinder aircraft piston engine

1920s piston aircraft engine family by Napier

1930s British piston aircraft engine

9-cylinder radial aircraft engine

1930s British aircraft piston engine

Small aircraft engines

O-4 piston aircraft engine

1930s piston aircraft engine family by de Havilland

Austrian two-stroke aircraft engine

aircraft engine family by Lycoming in the United States

I-4 piston aircraft engine

1990s French piston aircraft engine