EntityQ12061352· pop 8· linked from 243 articlesLockheed XH-51Sign in to save1962 experimental helicopter series by LockheedConnectionsLockheed AH-56 CheyenneEntityhelicopterEntityLockheed CorporationEntityLockheed A-12EntityLockheed VenturaEntityNASAConceptInternational Standard Book NumberEntityUnited States NavyEntityGeneral Dynamics F-16 Fighting FalconEntityLockheed Martin F-22 RaptorEntityUnited States ArmyEntityLockheed Martin F-35 Lightning IIConceptLockheed MartinEntityLockheed C-130 HerculesEntityHughes AH-64 ApacheEntityBoeing B-17 Flying FortressEntityLockheed F-117 NighthawkEntityLockheed SR-71 BlackbirdEntityLockheed U-2EntityLockheed P-38 LightningEntityCategories1960s United States helicoptersAircraft first flown in 1962Aircraft with auxiliary jet enginesAircraft with skid landing gearCompound helicoptersJet-propelled helicoptersLockheed aircraftRigid rotor helicoptersSingle-rotor helicoptersSingle-turbine helicoptersUnited States military helicopters