🌐EnglishEnglishBahasa IndonesiaDeutschEspañolFrançaisItalianoPolskiPortuguêsРусскийالعربيةفارسی한국어中文日本語EntityQ2454458· pop 17· linked from 197 articlesLockheed D-21Also known as D-21, Lockheed Q-12, Q-121962 American Mach 3+ reconnaissance droneWikidata factsImageM21Ship2-cropped.jpgSources (11)wikidata.orgarchive.orgtheaviationist.comarchive.orgarchive.orgarchive.orgnro.govAvailable in 16 languagesEspañolFrançaisDeutsch中文日本語РусскийPortuguêsItalianoالعربيةBahasa IndonesiaPolskiConnectionsLockheed AH-56 CheyenneEntityLockheed SR-71 BlackbirdEntityCategories1960s United States military reconnaissance aircraftAircraft first flown in 1964Composite aircraftLockheed aircraftRamjet-powered aircraftSingle-engined jet aircraftTailless delta-wing aircraftUnmanned military aircraft of the United StatesUnmanned stealth aircraft