EntityQ1867613· pop 14· linked from 421 articlesLockheed 12Sign in to savefamily of airliners and executive transport aircraftConnectionsLockheed AH-56 CheyenneEntityLockheed P-38 LightningEntityLockheed A-12EntityLockheed VenturaEntityCanada Aviation and Space MuseumEntityconstant speed propellerEntityUnited StatesCountryCanadaCountryUnited KingdomCountryBrazilCountryNetherlandsConceptArgentinaCountrySouth AfricaCountryIndonesiaCountryCubaCountryWorld War IIConceptCaliforniaEntityTexasEntityOhioEntityColoradoEntityCategories1930s United States airliners1930s United States civil utility aircraftAircraft first flown in 1936Aircraft with retractable conventional landing gearLockheed aircraftLow-wing aircraftTwin piston-engined tractor aircraftTwin-tail aircraft