🌐EnglishEnglishFrançaisItalianoPortuguês한국어中文日本語EntityQ3063504· pop 11· linked from 359 articlesflat-twinAlso known as flat-two, flat 2, F-2, F2, O-2, O2horizontally-opposed two-cylinder piston engineWikidata factsImageDouglas motorcycle engine, Abergavenny steam rally 2012.jpgSources (1)wikidata.orgvia Wikidata · CC0Available in 10 languagesFrançais中文日本語PortuguêsItalianoAfrikaansCatalanFinnish한국어via Wikidata sitelinks · CC0ConnectionsCarl BenzEntitysingle and double-acting cylindersEntityCategoriesAutomobile enginesFlat enginesMotorcycle enginesPiston engine configurations