🌐EnglishEnglishItalianoPortuguêsEntityQ4650149· pop 5· linked from 42 articlesABC DragonflyAlso known as DragonflyR-9 piston aircraft engineWikidata factsImageABC Dragonfly at London Science Museum.jpgvia Wikidata · CC0Available in 4 languagesPortuguêsItalianoTajikvia Wikidata sitelinks · CC0ConnectionsWorld War IConceptcopperEntityCategories1910s aircraft piston enginesABC aircraft enginesAircraft air-cooled radial piston enginesNine-cylinder engines