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- Northrop_X-21 abstract "The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. It was based on the Douglas WB-66D airframe, with the wing-mounted engines moved to the rear fuselage and making space for air compressors. The aircraft first flew on 18 April 1963 with NASA test pilot Jack Wells at the controls. Although useful testing was accomplished, the extensive maintenance of the intricate laminar-flow system caused the end of the program.".
- Northrop_X-21 manufacturer Northrop_Corporation.
- Northrop_X-21 numberBuilt "2".
- Northrop_X-21 predecessor Douglas_B-66_Destroyer.
- Northrop_X-21 thumbnail X21.jpg?width=300.
- Northrop_X-21 wikiPageExternalLink x-21a.htm.
- Northrop_X-21 wikiPageExternalLink x21.htm.
- Northrop_X-21 wikiPageExternalLink x-21.htm.
- Northrop_X-21 wikiPageID "1258713".
- Northrop_X-21 wikiPageRevisionID "596704673".
- Northrop_X-21 areaAlt "116.17".
- Northrop_X-21 areaMain "1250.0".
- Northrop_X-21 ceilingAlt "12,957 m".
- Northrop_X-21 ceilingMain "42500.0".
- Northrop_X-21 crew "Five".
- Northrop_X-21 developedFrom Douglas_B-66_Destroyer.
- Northrop_X-21 emptyWeightAlt "20783.0".
- Northrop_X-21 emptyWeightMain "45828.0".
- Northrop_X-21 engine(jet)_ "General Electric J79-GE-13".
- Northrop_X-21 firstFlight "1963-04-18".
- Northrop_X-21 hasPhotoCollection Northrop_X-21.
- Northrop_X-21 heightAlt "7.8 m".
- Northrop_X-21 heightMain "779.78".
- Northrop_X-21 introduced "experimental".
- Northrop_X-21 jetOrProp%3F_ "jet".
- Northrop_X-21 lengthAlt "22.94 m".
- Northrop_X-21 lengthMain "2293.62".
- Northrop_X-21 loadedWeightAlt "37727.0".
- Northrop_X-21 loadedWeightMain "83000.0".
- Northrop_X-21 manufacturer Northrop_Corporation.
- Northrop_X-21 maxSpeedAlt "560".
- Northrop_X-21 maxSpeedMain "487.0".
- Northrop_X-21 numberBuilt "2".
- Northrop_X-21 numberOfJets "2".
- Northrop_X-21 planeOrCopter%3F_ "plane".
- Northrop_X-21 primaryUser NASA.
- Northrop_X-21 rangeAlt "4780".
- Northrop_X-21 rangeMain "4156.0".
- Northrop_X-21 related "* B-66 Destroyer".
- Northrop_X-21 retired "1968".
- Northrop_X-21 sequence "X-18 - X-19 - X-20 - X-21 - X-22 - X-23 - X-24".
- Northrop_X-21 spanAlt "28.51 m".
- Northrop_X-21 spanMain "2849.8799999999997".
- Northrop_X-21 thrustAlt "41.9 kN".
- Northrop_X-21 thrustMain "9400".
- Northrop_X-21 type "experimental aircraft".
- Northrop_X-21 typeOfJet "turbojets".
- Northrop_X-21 subject Category:Edwards_Air_Force_Base.
- Northrop_X-21 subject Category:United_States_experimental_aircraft_1960–1969.
- Northrop_X-21 type Aircraft.
- Northrop_X-21 type MeanOfTransportation.
- Northrop_X-21 type Product.
- Northrop_X-21 type Model_airplane.
- Northrop_X-21 type DesignedArtifact.
- Northrop_X-21 comment "The Northrop X-21A was an experimental aircraft designed to test wings with laminar flow control. It was based on the Douglas WB-66D airframe, with the wing-mounted engines moved to the rear fuselage and making space for air compressors. The aircraft first flew on 18 April 1963 with NASA test pilot Jack Wells at the controls. Although useful testing was accomplished, the extensive maintenance of the intricate laminar-flow system caused the end of the program.".
- Northrop_X-21 label "Northrop X-21".
- Northrop_X-21 label "Northrop X-21".
- Northrop_X-21 label "Northrop X-21".
- Northrop_X-21 label "Northrop X-21".
- Northrop_X-21 label "Northrop X-21".
- Northrop_X-21 label "Northrop X-21".
- Northrop_X-21 label "X-21 (航空機)".
- Northrop_X-21 label "نورثروب إكس-21".
- Northrop_X-21 sameAs Northrop_X-21.
- Northrop_X-21 sameAs Northrop_X-21.
- Northrop_X-21 sameAs Northrop_X-21.
- Northrop_X-21 sameAs Northrop_X-21.
- Northrop_X-21 sameAs X-21_(航空機).
- Northrop_X-21 sameAs Northrop_X-21.
- Northrop_X-21 sameAs Northrop_X-21.
- Northrop_X-21 sameAs m.04mwl1.
- Northrop_X-21 sameAs Q2001199.
- Northrop_X-21 sameAs Q2001199.
- Northrop_X-21 wasDerivedFrom Northrop_X-21?oldid=596704673.
- Northrop_X-21 depiction X21.jpg.
- Northrop_X-21 isPrimaryTopicOf Northrop_X-21.
