Piper PA-40 Arapaho
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The Piper PA-40 Arapaho was an American twin-engined cabin monoplane designed by Piper as a replacement for the PA-39 Twin Comanche C/R.
Arapaho
Lycoming O-320
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The Lycoming O-320 is a large family of naturally aspirated, 320 cu in air-cooled, horizontally-opposed four-cylinder, direct-drive engines produced by Lycoming Engines. Introduced in 1953, it is comm
Piper PA-40 Arapaho
…similar in size to the Twin Comanche and had six seats but had a taller main landing gear and larger cabin windows. It had two counter-rotating 160 hp Lycoming IO-320 engines. The prototype was damaged in June 1972 when the factory at Lock Haven, Pennsylvania, flooded and the prototype, registered N9999P, did not fly…
A Lycoming O-320 on display at the Museu do Ar
An O-320-B2C mounted in a Robinson R22 helicopter
A brand new Lycoming O-320-D2A engine with baffles already mounted
An O-320-H2AD cutaway to show internal parts of the engine.