EntityQ3840979· pop 8· linked from 139 articlesR-680Sign in to save1929 9-cylinder radial engine family by LycomingConnectionsWasp JuniorEntityBeechcraft AT-10 WichitaEntityT55EntityUnited StatesCountryInternational Standard Book NumberEntitygasolineEntitypistonEntityUnited States Department of DefenseConceptgas turbineEntityoctane ratingEntityturbopropEntityturbofanEntityaircraft engineEntityradial engineEntityPratt & WhitneyEntityV engineEntityflat engineEntitycompression ratioEntityengine displacementEntitystraight engineEntityCategories1920s aircraft piston enginesAircraft air-cooled radial piston enginesLycoming aircraft enginesNine-cylinder engines